PRELIMINARY Am29240EH, Am29245EH, and Am29243EH Enhanced High-Performance RISC Microcontrollers 5/2/97 DISTINCTIVE CHARACTERISTICS Am29240EH Microcontroller All three microcontrollers in the Am29240EH microcontroller series have the following characteristics: The Am29240EH microcontroller has the following additional features: Completely integrated system for embedded applications 2-Kbyte, two-way set-associative data cache Full 32-bit architecture 4-Kbyte, two-way set-associative instruction cache 4-Gbyte virtual address space, 304-Mbyte physical space implemented Glueless system interfaces with on-chip wait state control 36 VAX MIPS (million instructions per second) sustained at 25 MHz Four banks of ROM, each separately programmable for 8-, 16-, or 32-bit interface Four banks of DRAM Single-cycle ROM burst-mode and DRAM page-mode access DRAM timing is software-programmable for 3/1 or 2/1 initial/burst access cycles Single-cycle 32-bit multiplier for faster integer math; two-cycle Multiply Accumulate (MAC) function 16-entry on-chip Memory Management Unit (MMU) with one Translation Look-Aside Buffer 4-channel double-buffered DMA controller with queued reload Two serial ports (UARTs) Bidirectional bit serializer/deserializer 20- and 25-MHz operating frequencies Am29243EH Microcontroller The Am29243EH data microcontroller is similar to the Am29240EH microcontroller, without the video interface. It includes the following features: 2-Kbyte, two-way set-associative data cache 6-port peripheral interface adapter Single-cycle 32-bit multiplier for faster integer math; two-cycle MAC 16-line programmable I/O port 32-entry on-chip MMU with dual TLBs Bidirectional parallel port controller 4-channel, double-buffered DMA controller with queued reload Interrupt controller Fully pipelined integer unit Three-address instruction architecture 192 general purpose registers Traceable Cache technology instruction and data cache tracing IEEE Std 1149.1-1990 (JTAG) compliant Standard Test Access Port and Boundary Scan Architecture Binary compatibility with all 29K family microprocessors and microcontrollers Two serial ports (UARTs) 20- and 25-MHz operating frequencies DRAM parity Am29245EH Microcontroller The low-cost Am29245EH microcontroller is similar to the Am29240EH microcontroller, without the data cache and 32-bit multiplier. It includes the following features: 16-entry on-chip MMU with one TLB Two-channel DMA controller CMOS technology/TTL compatible One serial port (UART) 208-pin Plastic Quad Flat Pack (PQFP) package Bidirectional bit serializer/deserializer 3.3-V power supply with 5-V-tolerant I/O 16-MHz operating frequency This document contains information on a product under development at Advanced Micro Devices, Inc. The information is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed product without notice. Publication #: 20068 Rev. A Amendment: /0 Issue Date: May 1997 PRELIMINARY Am29240EH MICROCONTROLLER BLOCK DIAGRAM Parallel Port Control/Status Lines 4 6 Serial Data Printer/Scanner Video ROM Chip Selects 6 STAT MEMCLK 4 JTAG Clock/ Control Lines 11 8 4 DREQ 4 DACK GREQ/GACK/TDMA Parallel Port Controller Am29000 CPU 4-Channel DMA Controller 16 Dual Serial Ports Programmable I/O Port I/O 4K ICache Serializer/ Deserializer 2K DCache Interrupt Controller ROM Controller 4 6 24 4/4 32 Instruction/Data Bus Address Bus PIA Chip Selects RAS/CAS Timer/Counter MMU 6 Interrupts, Traps 32x32 Multiply DRAM Controller PIA Controller ROM Space Memory 5 DRAM Peripherals Am29245EH MICROCONTROLLER BLOCK DIAGRAM Parallel Port Control/Status Lines 4 4 Serial Data Printer/Scanner Video ROM Chip Selects 4 ROM Space Memory 6 STAT MEMCLK Parallel Port Controller Single Serial Port 4 JTAG 5 Clock/ Control Lines 8 7 2 DREQ 2 DACK GREQ/GACK/TDMA 16 Am29000 CPU 2-Channel DMA Controller Programmable I/O Port I/O 4K ICache Serializer/ Deserializer Interrupt Controller ROM Controller DRAM Controller PIA Controller MMU 6 PIA Chip Selects 24 Address Bus Timer/Counter 32 Instruction/Data Bus Peripherals 2 Am29240 EH Microcontroller Series 6 Interrupts, Traps RAS/CAS 4/4 DRAM PRELIMINARY Am29243EH MICROCONTROLLER BLOCK DIAGRAM Parallel Port Control/Status Lines 5 6 Serial Data ROM Chip Selects 6 STAT MEMCLK JTAG Clock/ 5 Control Lines 8 11 4 DREQ 4 DACK GREQ/GACK/TDMA Parallel Port Controller 4-Channel DMA Controller 16 Am29000 CPU Dual Serial Ports Programmable I/O Port I/O 4K ICache 2K DCache Interrupt Controller ROM Controller 4 4 MMU Timer/Counter 32 ROM Space Memory 6 PIA Chip Selects Interrupts, Traps 32x32 Multiply DRAM Controller PIA Controller 24 Address Bus 32 Instruction/Data Bus 6 36 DRAM Parity RAS/CAS 4/4 DRAM Peripherals CUSTOMER SERVICE AMD's customer service network includes U.S. offices, international offices, and a customer training center. Expert technical assistance is available from AMD's worldwide staff of field application engineers and support staff. For answers to technical questions, AMD provides a toll-free number for direct access to our corporate applications hotline. Also available is the AMD World Wide Web home page and FTP site, which provides the latest 29K family product information. Documentation and Literature A simple phone call gets you free 29K family information such as data sheets, user's manuals, application notes, the Fusion29K Partner Solutions Catalog, and other literature. Internationally, contact your local AMD sales office for complete 29K family literature. Literature Ordering Corporate Applications Hotline (800) 222-9323, option 3 (512) 602-5651 (800) 222-9323, option 2 (800) 222-9323, option 5 44-(0) 1276-803-299 Engineering Support RELATED DOCUMENTS toll-free for U.S. U.K. and Europe hotline lpd.support@amd.com e-mail World Wide Web Home Page and FTP Site To access the AMD home page on the web, go to: http:/www.amd.com. Questions, requests, and input concerning AMD's WWW pages can be sent via e-mail to webmaster@amd.com. To download documents and software, ftp to ftp.amd.com and log on as anonymous using your e-mail address as a password. Or, with your web browser, go to ftp://ftp.amd.com. toll-free for U.S. direct dial worldwide AMD Facts-On-Demand fax information service toll-free for U.S., Canada The Am29240EH, Am29245EH, and Am29243EH RISC Microcontrollers User's Manual (order #17741) describes the technical features, programming interface, on-chip peripherals, register set, and instruction set for the Am29240EH microcontroller series. Programming the 29K RISC Family (order #19243) includes comprehensive information about the 29K family for the software developer. Am29240 EH Microcontroller Series 3 PRELIMINARY GENERAL DESCRIPTION Am29245EH Microcontroller The Am29240EH microcontroller series is an enhanced bus-compatible extension of the Am29200 RISC microcontroller family, with two to four times the performance. The Am29240EH microcontroller series includes the Am29240EH microcontroller, the low-cost Am29245EH microcontroller, and the Am29243EH data microcontroller. The on-chip caches, MMU, faster integer math, and extended DMA addressing capability of the Am29240EH microcontroller series allow the embedded systems designer to provide increasing levels of performance and software compatibility throughout a range of products (see Table 1 on page 6). The low-cost Am29245EH microcontroller is designed for embedded applications in which cost and space constraints, along with increased performance requirements, are primary considerations. Based on a low-voltage CMOS-technology design, these devices offer a complete set of system peripherals and interfaces commonly used in embedded applications. Compared to CISC processors, the Am29240EH microcontroller series offers better performance, more efficient use of low-cost memories, lower system cost, and complete design flexibility for the designer. Coupled with hardware and software development tools from the AMD Fusion29K partners, the Am29240EH microcontroller series provides the embedded product designer with the cost and performance edge required by today's marketplace. For a complete description of the technical features, onchip peripherals, programming interface, register set, and instruction set, please refer to the Am29240EH, Am29245EH, and Am29243EH RISC Microcontrollers User's Manual (order #17741). Am29240EH Microcontroller The Am29245EH microcontroller also provides an easy upgrade path for Am29200, Am29202, and Am29205 microcontroller-based products. Am29243EH Microcontroller With DRAM parity support and a full MMU, the Am29243EH data microcontroller is recommended for communications applications that require high-speed data movement and fast protocol processing in a faulttolerant environment. Both the Am29243EH and Am29240EH microcontrollers support fly-by DMA at 100 Mbytes/s for LANs and switching applications, and a two-cycle Multiply Accumulate function for DSP applications. The low power requirements make either microcontroller a good choice for field-deployed devices. Development Support Products The Fusion29K Program of Partnerships for Application Solutions provides the user with a vast array of products designed to meet critical time-to-market needs. Products/solutions available from the AMD Fusion29K partners include the following: Optimizing compilers for common high-level languages Assembler and utility packages For general-purpose embedded applications, such as mass-storage controllers, communications, digital signal processing, networking, industrial control, penbased systems, and multimedia, the Am29240EH microcontroller provides a high-performance solution with a low total-system cost. The memory interface of the Am29240EH microcontroller provides even faster direct memory access than the Am29200 microcontroller. This performance improvement minimizes the effect of memory latency, allowing designers to use low-cost memory with simpler memory designs. On-chip instruction and data caches provide even better performance for time-critical code. Source- and assembly-level software debuggers Other on-chip functions include: a ROM controller, DRAM controller, peripheral interface adapter controller, DMA controller, programmable I/O port, parallel port controller, serial ports, and an interrupt controller. Networking and communication solutions 4 Target-resident development monitors Simulators Execution boards Hardware development tools Silicon products Board-level products Laser-printer solutions Multiuser, kernel, and real-time operating systems Graphics solutions Manufacturing support Custom software consulting, support, and training Am29240 EH Microcontroller Series PRELIMINARY ORDERING INFORMATION Standard Products AMDr standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the elements below. Am29240EH -25 K C \W PROCESSING \W = Trimmed and Formed TEMPERATURE RANGE C = Commercial (TC = 0C to +85C) PACKAGE TYPE K = 208-Lead Plastic Quad Flat Pack (PQR 208) SPEED OPTION -25 = 25 MHz -20 = 20 MHz -16 = 16 MHz DEVICE NUMBER/DESCRIPTION Am29240EH Enhanced RISC Microcontroller Am29245EH Enhanced RISC Microcontroller Am29243EH Enhanced RISC Data Microcontroller Valid Combinations Valid Combinations Am29240EH-20 Am29240EH-25 KC\W Am29243EH-20 Am29243EH-25 KC\W Am29245EH-16 KC\W Valid Combinations lists configurations planned to be supported in volume. Consult the local AMD sales office to confirm availability of specific valid combinations, to check on newly released combinations, and to obtain additional data on AMD standard military grade products. RELATED AMD PRODUCTS 29K Family Devices Product Description Am29000R 32-bit RISC microprocessor Am29005 Low-cost 32-bit RISC microprocessor with no MMU and no branch target cache Am29030 32-bit RISC microprocessor with 8-Kbyte instruction cache Am29035 32-bit RISC microprocessor with 4-Kbyte instruction cache Am29040 32-bit RISC microprocessor with 8-Kbyte instruction cache and 4-Kbyte data cache Am29050 32-bit RISC microprocessor with on-chip floating point Am29200 32-bit RISC microcontroller Am29202 Low-cost 32-bit RISC microcontroller with IEEE-1284-compliant parallel interface Am29205 Low-cost 32-bit RISC microcontroller Am29240 EH Microcontroller Series 5 PRELIMINARY Table 1. Product Comparison--Am29200 Microcontroller Family Am29205 Controller Am29202 Controller Am29200 Controller Am29245EH Controller Am29240EH Controller Am29243EH Controller Instruction Cache -- -- -- 4 Kbytes 4 Kbytes 4 Kbytes Data Cache -- -- -- -- 2 Kbytes 2 Kbytes Cache Associativity -- -- -- 2-way 2-way 2-way Software Software Software Software 32 x 32-bit 32 x 32-bit -- -- -- 1 TLB 16 Entry 1 TLB 16 Entry 2 TLBs 32 Entry 32 bits 16 bits 32 bits 32 bits 32 bits 32 bits 32 bits 32 bits 32 bits 32 bits 32 bits 32 bits 3 8, 16 bits 4 Mbytes 16 bits Not Supported 4 8, 16, 32 bits 4 Mbytes 8, 16, 32 bits Not Supported 4 8, 16, 32 bits 16 Mbytes 8, 16, 32 bits Supported 4 8, 16, 32 bits 16 Mbytes 8, 16, 32 bits Supported 4 8, 16, 32 bits 16 Mbytes 8, 16, 32 bits Supported 4 8, 16, 32 bits 16 Mbytes 8, 16, 32 bits Supported 4 16 bits only -- 8 Mbytes/bank Not Supported 4 16, 32 bits 16 Mbytes/bank 8 Mbytes/bank Not Supported 4 16, 32 bits 16 Mbytes/bank 8 Mbytes/bank Supported 4 32 bits 16 Mbytes/bank Not supported Supported 4 32 bits 16 Mbytes/bank Not supported Supported 4 32 bits 16 Mbytes/bank Not supported Not Supported 3/2 No 3/2 No 3/2 No 2/1 or 3/1 No 2/1 or 3/1 No 2/1 or 3/1 Yes 8, 16 bits 2 1 No No No 8, 16, 32 bits 2 1 No No No 8, 16, 32 bits 2 2 Yes No Yes 8, 16, 32 bits 2 2 Yes Yes Yes 8, 16, 32 bits 4 4 Yes Yes Yes 8, 16, 32 bits 4 4 Yes Yes Yes No No No Yes Yes Yes 2 8, 16 bits 3 2 8, 16, 32 bits 3 6 8, 16, 32 bits 3 6 8, 16, 32 bits 1 6 8, 16, 32 bits 1 6 8, 16, 32 bits 1 8 12 16 16 16 16 8 8 8 8 8 8 1 Port PIO signals 1 Port PIO signals 1 Port Supported 1 Port Supported 2 Ports 1 Port Supported 2 Ports 1 Port Supported 2 2 4 4 4 4 0 0 3 3 3 3 Parallel Port Controller 32-Bit Transfer IEEE-1284 Interface Yes No No Yes Yes Yes Yes Yes No Yes Yes No Yes Yes No Yes Yes No JTAG Debug Support No Yes Yes Yes Yes Yes Serializer/Deserializer Yes Yes Yes Yes Yes No 100 PQFP 132 PQFP 168 PQFP 208 PQFP 208 PQFP 208 PQFP 5V 5V 5V 5V 5V 5V 3.3 V 5V 3.3 V 5V 3.3 V 5V 12, 16 MHz 12, 16, 20 MHz 16, 20 MHz 16 MHz 20, 25 MHz 20, 25 MHz FEATURE Integer Multiplier Memory Management Unit (MMU) Data Bus Width Internal External ROM Interface Banks Width ROM Size (Max/Bank) Boot-Up ROM Width Burst-Mode Access DRAM Interface Banks Width Size: 32-Bit Mode Size: 16-Bit Mode Video DRAM Access Cycles Initial/Burst DRAM Parity On-Chip DMA Width (ext. peripherals) Total Number of Channels Externally Controlled External Master Access External Master Burst External Terminate Signal Low-Voltage Operation Peripheral Interface Adapter (PIA) PIA Ports Data Width Min. Cycles Access Programmable I/O Port (PIO) Signals Signals programmable for interrupt generation Serial Ports Ports DSR/DTR Interrupt Controller External Interrupt Pins External Trap and Warn Pins Pin Count and Package Operating Voltage VCC I/O Tolerance Processor Clock Rate 6 Am29240 EH Microcontroller Series PRELIMINARY KEY FEATURES AND BENEFITS Complete Set of Common Peripherals The Am29240EH microcontroller series extends the line of RISC microcontrollers based on 29K family architecture, providing performance upgrades to the Am29205 and Am29200 microcontrollers. The RISC microcontroller product line allows users to benefit from the very high performance of the 29K family architecture, while also capitalizing on the very low system cost made possible by integrating processor and peripherals. The Am29240EH microcontroller series minimizes system cost by incorporating a complete set of system facilities commonly found in embedded applications, eliminating the cost of additional components. The onchip functions include: a ROM controller, a DRAM controller, a peripheral interface adapter, a DMA controller, a programmable I/O port, a parallel port, up to two serial ports, and an interrupt controller. A video interface is also included in the Am29240EH and Am29245EH microcontrollers for printer, scanner, and other imaging applications. These facilities allow many simple systems to be built using only the Am29240EH microcontroller series, external ROM, and/or DRAM memory. The Am29240EH microcontroller series expands the price/performance range of systems that can be built with the 29K family. The Am29240EH microcontroller series is fully software compatible with the Am29000, Am29005, Am29030, Am29035, Am29040, and Am29050 microprocessors, as well as the Am29200 and Am29205 microcontrollers. It can be used in existing 29K family microcontroller applications without software modifications. On-Chip Caches The Am29240EH microcontroller series incorporates a 4-Kbyte, two-way instruction cache that supplies most processor instructions without wait states at the processor frequency. For best performance, the instruction cache supports critical-word-first reloading with fetchthrough, so that the processor receives the required instruction and the pipeline restarts with minimum delay. The instruction cache has a valid bit per word to minimize the reload overhead. All cache array elements are visible to software for testing and preload. The Am29240EH and Am29243EH microcontrollers incorporate a 2-Kbyte, two-way set-associative data cache. The data cache appears in the execute stage of the processor pipeline, so that loaded data is available immediately to the next instruction. This provides the maximum performance for loads without requiring load scheduling. This minimizes the time the processor waits on external data as well as minimizing the reload time. The data cache uses a write-through policy with a twoentry write buffer. Byte, half-word, and word reads and writes are supported. All cache array elements are visible to software for testing and preload. Single-Cycle Multiplier The Am29240EH and Am29243EH microcontrollers incorporate a full combinatorial multiplier that accepts two 32-bit input operands and produces a 32-bit result in a single cycle. The multiplier can produce a 64-bit result in two cycles. The multiplier permits maximum performance without requiring instruction scheduling, since the latency of the multiply is the same as the latency of other integer operations. High-performance multiplication benefits imaging, signal processing, and state modeling applications. ROM Controller The ROM controller supports four individual banks of ROM or other static memory, each with its own timing characteristics. Each ROM bank may be a different size and may be either 8, 16, or 32 bits wide. The ROM banks can appear as a contiguous memory area of up to 64 Mbytes in size. The ROM controller also supports byte, half-word, and word writes to the ROM memory space for devices such as flash EPROMs and SRAMs. DRAM Controller The DRAM controller supports four separate banks of dynamic memory. Each bank may be a different size and must be 32 bits wide. The DRAM banks can appear as a contiguous memory area of up to 64 Mbytes in size. The DRAM controller supports two- or three-cycle accesses (programmable by software), with single-cycle pagemode and burst-mode accesses. Burst accesses are supported at two initial, one burst, or three initial, one burst. Peripheral Interface Adapter The Peripheral Interface Adapter (PIA) permits glueless interfacing to as many as six external peripheral chips. The PIA allows for additional system features implemented by external peripheral chips. DMA Controller The DMA controller provides up to four channels for transferring data between the DRAM and internal or external peripherals. Fly-by DMA transfers data directly between an external peripheral and DRAM or ROM, permitting very high data bandwidth. The peripheral must support the timing of the memory (DRAM or ROM). The transfer occurs at the rate of one 32-bit word per cycle, if DRAM page-mode accesses or ROM burst-mode or single-cycle accesses are enabled. For page-mode DRAM, the TDMA signal is asserted on the rising edge following the last access. For an initial access, TDMA is asserted simultaneously with DACKx. DMA wait states and peripheral wait states are ignored Am29240 EH Microcontroller Series 7 PRELIMINARY during fly-by transfers. A higher fly-by DMA transfer can interrupt a lower fly-by transfer. Refresh does not pre-empt a fly-by transfer. A DMA transfer continues until either DREQx is deasserted, the transfer is interrupted by a higher priority DMA, or the Count Terminate Enable (CTE) bit is set. No refreshes will occur until the fly-by transfer is completed, so fly-by transfers must be less than one refresh interval in length. The DREQx signal must be configured as levelsensitive in the DRAM Control Register. Parity checking and generation cannot be performed during a fly-by transfer. Note also that zero-wait-state ROM cannot be used with fly-by DMA. I/O Port The I/O port permits direct access to 16 individually programmable external input/output signals. Eight of these signals can be configured to cause interrupts. Parallel Port The parallel port implements a bidirectional IBM PCcompatible parallel interface to a host processor. Serial Port The serial port implements up to two full-duplex UARTs. Serializer/Deserializer The serializer/deserializer (video interface) on the Am29240EH and Am29245EH microcontrollers permits direct connection to a number of laser-marking engines, video displays, or raster input devices such as scanners. Interrupt Controller The interrupt controller generates and reports the status of interrupts caused by on-chip peripherals. Wide Range of Price/Performance Points To reduce design costs and time-to-market, the product designer can use the Am29200 microcontroller family and one basic system design as the foundation for an entire product line. From this design, numerous implementations of the product at various levels of price and performance may be derived with minimum time, effort, and cost. The Am29240EH RISC microcontroller series supports this capability through various combinations of on-chip caches, programmable memory widths, programmable wait states, burst-mode and page-mode access support, bus compatibility, and 29K family software compatibility. A system can be upgraded using various memory architectures without hardware and software redesign. The ROM controller accommodates memories that are either 8, 16, or 32 bits wide, and the DRAM controller accommodates dynamic memories that are 32 bits wide. This unique feature provides a flexible interface to lowcost memory, as well as a convenient, flexible upgrade 8 path. For example, a system can start with a 16-bit ROM memory design and can subsequently improve performance by migrating to a 32-bit ROM memory design. One particular advantage is the ability to add memory in half-megabyte increments. This provides significant cost savings for applications that do not require larger memory upgrades. The Am29200, Am29202, Am29205, Am29240, Am29245, and Am29243EH microcontrollers allow users to address an extremely wide range of cost performance points, with higher performance and lower cost than existing designs based on CISC microprocessors. Glueless System Interfaces The Am29240EH microcontroller series also minimizes system cost by providing a glueless attachment to external ROMs, DRAMs, and other peripheral components. Processor outputs have edge-rate control that allows them to drive a wide range of load capacitances with low noise and ringing. This eliminates the cost of external logic and buffering. Bus and Software Compatibility Compatibility within a processor family is critical for achieving a rational, easy upgrade path. Processors in the Am29240EH microcontroller series are all members of a bus-compatible family of RISC microcontrollers. All members of this family--the Am29205, Am29202, Am29200, Am29240, Am29245, and Am29243EH microcontrollers--allow improvements in price, performance, and system capabilities without requiring that users redesign their system hardware or software. Bus compatibility ensures a convenient upgrade path for future systems. The Am29240EH microcontroller series is available in a 208-pin plastic quad flat-pack (PQFP) package. The Am29240EH microcontroller series is signal-compatible with the Am29200 and the Am29205 microcontrollers. Moreover, the Am29240EH microcontroller series is binary compatible with existing RISC microcontrollers and other members of the 29K family (the Am29000, Am29005, Am29030, Am29035, Am29040, and Am29050 microprocessors, as well as the Am29200, Am29202, and Am29205 microcontrollers). The Am29240EH microcontroller series provides a migration path to low-cost, high-performance, highly integrated systems from other 29K family members, without requiring expensive rewrites of application software. Debugging and Testing The Am29240EH microcontroller series provides debugging and testing features at both the software and hardware levels. Am29240 EH Microcontroller Series PRELIMINARY Software debugging is facilitated by the instruction trace facility and instruction breakpoints. Instruction tracing is accomplished by forcing the processor to trap after each instruction has been executed. Instruction breakpoints are implemented by the HALT instruction or by a software trap. The processor provides several additional features to assist system debugging and testing: The Test/Development Interface is composed of a group of pins that indicate the state of the processor and control the operation of the processor. A Traceable Cache feature permits a hardwaredevelopment system to track accesses to the onchip caches, permitting a high level of visibility into processor operation. An IEEE Std 1149.1-1990 (JTAG) compliant Standard Test Access Port and Boundary-Scan Architecture. The Test Access Port provides a scan interface for testing processor and system hardware in a production environment, and contains extensions that allow a hardware-development system to control and observe the processor without interposing hardware between the processor and system. PERFORMANCE OVERVIEW The Am29240EH microcontroller series offers a significant margin of performance over CISC microprocessors in existing embedded designs, since the majority of processor features were defined for the maximum achievable performance at very low cost. This section describes the features of the Am29240EH microcontroller series from the point of view of system performance. Instruction Timing The Am29240EH microcontroller series uses an arithmetic/logic unit, a field shift unit, and a prioritizer to execute most instructions. Each of these is organized to operate on 32-bit operands and provide a 32-bit result. All operations are performed in a single cycle. The performance degradation of load and store operations is minimized in the Am29240EH microcontroller series by overlapping them with instruction execution, by taking advantage of pipelining, by an on-chip data cache, and by organizing the flow of external data into the processor so that the impact of external accesses is minimized. Pipelining Instruction operations are overlapped with instruction fetch, instruction decode and operand fetch, instruction execution, and result write-back to the Register File. Pipeline forwarding logic detects pipeline dependencies and routes data as required, avoiding delays that might arise from these dependencies. Pipeline interlocks are implemented by processor hardware. Except for a few special cases, it is not necessary to rearrange programs to avoid pipeline dependencies, although this is sometimes desirable for performance. On-Chip Instruction and Data Caches On-chip instruction and data caches satisfy most processor fetches without wait states. The caches are pipelined for best performance. The reload policies minimize the amount of time spent waiting for reload, while optimizing the benefit of locality of reference. Burst-Mode and Page-Mode Memories The Am29240EH microcontroller series directly supports burst-mode memories. The burst-mode memory supplies instructions at the maximum bandwidth, without the complexity of an external cache or the performance degradation due to cache misses. The processor can also use the page-mode capability of common DRAMs to improve the access time in cases where page-mode accesses can be used. Instruction Set Overview All 29K family members employ a three-address instruction set architecture. The compiler or assembly-language programmer is given complete freedom to allocate register usage. There are 192 general-purpose registers, allowing the retention of intermediate calculations and avoiding needless data destruction. Instruction operands may be contained in any of the general-purpose registers, and the results may be stored into any of the general-purpose registers. The Am29240EH microcontroller series instruction set contains 117 instructions that are divided into nine classes. These classes are integer arithmetic, compare, logical, shift, data movement, constant, floating point, branch, and miscellaneous. The floating-point instructions are not executed directly, but are emulated by trap handlers. All directly implemented instructions are capable of executing in one processor cycle, with the exception of interrupt returns, loads, and stores. Data Formats The Am29240EH microcontroller series defines a word as 32 bits of data, a half-word as 16 bits, and a byte as 8 bits. The hardware provides direct support for wordinteger (signed and unsigned), word-logical, word-Boolean, half-word integer (signed and unsigned), and character data (signed and unsigned). Word-Boolean data is based on the value contained in the most significant bit of the word. The values TRUE and FALSE are represented by the most significant bit values 1 and 0, respectively. Other data formats, such as character strings, are supported by instruction sequences. Floating-point formats Am29240 EH Microcontroller Series 9 PRELIMINARY (single and double precision) are defined for the processor; however, there is no direct hardware support for these formats in the Am29240EH microcontroller series. PIN DESCRIPTIONS A23-A0 Address Bus (output, synchronous) Protection The Am29240EH microcontroller series offers two mutually exclusive modes of execution--the User and Supervisor modes--that restrict or permit accesses to certain processor registers and external storage locations. The Address Bus supplies the byte address for all accesses, except for DRAM accesses. For DRAM accesses, multiplexed row and column addresses are provided on A14-A1. A2-A0 are also used to provide a clock to an optional burst-mode EPROM. The register file may be configured to restrict accesses to Supervisor-mode programs on a bank-by-bank basis. BOOTW Memory Management Unit This input configures the width of ROM Bank 0, so the ROM can be accessed before the ROM configuration has been set by the system initialization software. The BOOTW signal is sampled during and after a processor reset. If BOOTW is High before and after reset (tied High), the boot ROM is 32 bits wide. If BOOTW is Low before and after reset (tied Low), the boot ROM is 16 bits wide. If BOOTW is Low before reset and High after reset (tied to RESET), the boot ROM is 8 bits wide. This signal has special hardening against metastable states, allowing it to be driven with a slow-rise-time signal and permitting it to be tied to RESET. The Am29240EH microcontroller series provides a memory-management unit (MMU) for translating virtual addresses into physical addresses. The page size for translation ranges from 1 Kbyte to 16 Mbytes in powers of 4. The Am29245EH and Am29240EH microcontrollers each have a single, 16-entry TLB. The Am29243EH microcontroller has dual 16-entry TLBs, each capable of mapping pages of different size. Interrupts and Traps When the microcontroller takes an interrupt or trap, it does not automatically save its current state information in memory. This lightweight interrupt and trap facility greatly improves the performance of temporary interruptions such as simple operating-system calls that require no saving of state information. In cases where the processor state must be saved, the saving and restoring of state information is under the control of software. The methods and data structures used to handle interrupts--and the amount of state saved--may be tailored to the needs of a particular system. Interrupts and traps are dispatched through a 256-entry vector table that directs the processor to a routine that handles a given interrupt or trap. The vector table may be relocated in memory by the modification of a processor register. There may be multiple vector tables in the system, though only one is active at any given time. The vector table is a table of pointers to the interrupt and trap handlers, and requires only 1 Kbyte of memory. The processor performs a vector fetch every time an interrupt or trap is taken. The vector fetch requires at least three cycles, in addition to the number of cycles required for the basic memory access. Boot ROM Width (input, asynchronous) BURST Burst-Mode Access (output, synchronous) This signal is asserted to perform sequential accesses from a burst-mode device. CAS3-CAS0 Column Address Strobes, Byte 3-0 (output, synchronous) A High-to-Low transition on these signals causes the DRAM selected by RAS3-RAS0 to latch the column address and complete the access. To support byte and half-word writes, column address strobes are provided for individual DRAM bytes. CAS3 is the column address strobe for the DRAMs, in all banks, attached to ID31-ID24. CAS2 is for the DRAMs attached to ID23-ID16, and so on. These signals are also used in other special DRAM cycles. CNTL1-CNTL0 CPU Control (input, asynchronous, internal pull-ups) These inputs specify the processor mode: Load Test Instruction, Step, Halt, or Normal. DACKD-DACKA DMA Acknowledge D through A (output, synchronous) These signals acknowledge an external transfer on a DMA channel. DMA acknowledgments are not dedicated to a particular DMA channel--each channel specifies which acknowledge line, if any, it is using. Only one 10 Am29240 EH Microcontroller Series PRELIMINARY channel at a time can use either DACKD, DACKC, DACKB, or DACKA, and the same channel uses the respective DREQD-DREQA signal for transfer requests. DMA transfers can occur to and from internal peripherals independent of these acknowledgments. The DACKD and DACKC signals are supported on the Am29240EH and Am29243EH microcontrollers only. DREQD-DREQA DMA Request D through A (input, asynchronous, pull-up resistors) These inputs request an external transfer on a DMA channel. DMA requests are not dedicated to a particular channel--each channel specifies which request line, if any, it is using. Only one channel at a time can use either DREQD, DREQC, DREQB, or DREQA. This channel acknowledges a transfer using the respective DACKD- DACKA signal. These requests are individually programmable to be either level- or edge-sensitive for either polarity of level or edge. DMA transfers can occur to and from internal peripherals independent of these requests. The DMA request/acknowledge pairs DREQA/ DACKA and DREQB/ DACKB correspond to the Am29200 microcontroller signals DREQ0/DACK0 and DREQ1/DACK1, respectively. The pin placement reflects this correspondence, and a processor reset dedicates these request/ acknowledge pairs to DMA channels 0 and 1, respectively. This permits backward-compatible upgrade to an Am29200 microcontroller. The DREQD and DREQC signals are supported on the Am29240EH and Am29243EH microcontrollers only. GREQ External Memory Grant Request (input, synchronous, pull-up resistor) This signal is used by an external device to request an access to the processor's ROM or DRAM. To perform this access, the external device supplies an address to the ROM controller or DRAM controller. To support a hardware-development system, GREQ should be either tied High or held at a high-impedance state during a processor reset. ID31-ID0 Instruction/Data Bus (bidirectional, synchronous) The Instruction/Data Bus (ID Bus) transfers instructions to, and data to and from the processor. IDP3-IDP0 Instruction/Data Parity (bidirectional, synchronous) If parity checking is enabled by the PCE bit of the DRAM Control Register, IDP3-IDP0 are parity bits for the ID Bus during DRAM accesses. IDP3 is the parity bit for ID31-ID24, IDP2 is the parity bit for ID23-ID16, and so on. If parity is enabled, the processor drives IDP3-IDP0 with valid parity during DRAM writes, and expects IDP3-IDP0 to be driven with valid parity during DRAM reads. These signals are supported on the Am29243EH microcontroller only. INCLK DSRA Input Clock (input) Data Set Ready, Port A (output, synchronous) This is an oscillator input at twice the system operating frequency. This indicates to the host that the serial port is ready to transmit or receive data on Serial Port A. INTR3-INTR0 Interrupt Requests 3-0 (input, asynchronous, internal pull-up resistors) DTRA Data Terminal Ready, Port A (input, asynchronous) This indicates to the processor that the host is ready to transmit or receive data on Serial Port A. GACK External Memory Grant Acknowledge (output, synchronous) This signal indicates to an external device that it has been granted an access to the processor's ROM or DRAM, and that the device should provide an address. The processor can be placed into a slave configuration that allows tracing of a master processor. In this configuration, GACK is used to indicate that the processor pipeline was held during the previous processor cycle. These inputs generate prioritized interrupt requests. The interrupt caused by INTR0 has the highest priority, and the interrupt caused by INTR3 has the lowest priority. The interrupt requests are masked in prioritized order by the Interrupt Mask field in the Current Processor Status Register and are disabled by the DA and DI bits of the Current Processor Status Register. These signals have special hardening against metastable states, allowing them to be driven with slow-transition-time signals. LSYNC Line Synchronization (input, asynchronous) This signal indicates the start of a raster line. This signal is supported on the Am29240EH and Am29245EH microcontrollers only. Am29240 EH Microcontroller Series 11 PRELIMINARY MEMCLK PIO15-PIO0 Memory Clock (output) Programmable Input/Output (input/output, asynchronous) MEMCLK is an output clock only. It operates at the system operating frequency, which is half of the INCLK frequency. Most processor inputs and outputs are synchronous to MEMCLK. Note that MEMCLK as an input is not supported on the Am29240EH microcontroller series. MEMDRV MEMCLK Drive Enable (input, internal pull-up resistor) The MEMDRV signal is reserved on the Am29240EH microcontroller series. This pin should be either tied High or left unconnected. PACK Parallel Port Acknowledge (output, synchronous) This signal is used by the processor to acknowledge a transfer from the host or to indicate to the host that data has been placed on the port. PAUTOFD These signals are available for direct software control and inspection. PIO15-PIO8 may be individually programmed to cause processor interrupts. These signals have special hardening against metastable states, allowing them to be driven with slow-transition-time signals. The PIO signals are sampled during a processor reset. After reset, the sampled value is held in the PIO Input Register. This sampled value is supplied the first time this register is read, unless the read is preceded by write to the PIO Input Register or by a read or write of any other PIO register. This may be used to indicate system configuration information to the processor during a reset. POE Parallel Port Output Enable (output, synchronous) This signal enables an external data buffer containing data from the host to drive the ID Bus. Parallel Port Autofeed (input, asynchronous) PSTROBE This signal is used by the host to indicate how line feeds should be performed or is used to indicate that the host is busy and cannot accept a data transfer. Parallel Port Strobe (input, asynchronous) PBUSY This signal is used by the host to indicate that data is on the Parallel Port or to acknowledge a transfer from the processor. Parallel Port Busy (output, synchronous) PSYNC This indicates to the host that the Parallel Port is busy and cannot accept a data transfer. Page Synchronization (input/output, asynchronous) PIACS5-PIACS0 This signal indicates the beginning of a raster page. This signal is supported on the Am29240EH and Am29245EH microcontrollers only. Peripheral Chip Selects, Regions 5-0 (output, synchronous) PWE These signals are used to select individual peripheral devices. DMA channels may be programmed to use dedicated chip selects during an external peripheral access. Parallel Port Write Enable (output, synchronous) This signal writes a buffer with data on the ID Bus. Then, the buffer drives data to the host. R/W PIAOE Read/Write (output, synchronous) Peripheral Output Enable (output, synchronous) This signal enables the selected peripheral device to drive the ID bus. During an external ROM, DRAM, DMA, or PIA access, this signal indicates the direction of transfer: High for a read and Low for a write. PIAWE RAS3-RAS0 Peripheral Write Enable (output, synchronous) Row Address Strobe, Banks 3-0 (output, synchronous) This signal causes data on the ID bus to be written into the selected peripheral. 12 A High-to-Low transition on one of these signals causes a DRAM in the corresponding bank to latch the row address and begin an access. RAS3 starts an access in DRAM Bank 3, and so on. These signals also are used in other special DRAM cycles. Am29240 EH Microcontroller Series PRELIMINARY RESET TDI Reset (input, asynchronous) Test Data Input (input, synchronous to TCK, pull-up resistor) This input places the processor in the Reset mode. This signal has special hardening against metastable states, allowing it to be driven with a slow-rise-time signal. ROMCS3-ROMCS0 ROM Chip Selects, Banks 3-0 (output, synchronous) A Low level on one of these signals selects the memory devices in the corresponding ROM bank. ROMCS3 selects devices in ROM Bank 3, etc. The timing and access parameters of each bank are individually programmable. ROMOE ROM Output Enable (output, synchronous) This signal enables the selected ROM Bank to drive the ID bus. It is used to prevent bus contention when switching between different ROM banks or switching between a ROM bank and another device or DRAM bank. RSWE ROM Space Write Enable (output, synchronous) This signal is used to write an alterable memory in a ROM bank (such as an SRAM or Flash EPROM). This input supplies data to the test logic from an external source. It is sampled on the rising edge of TCK. If it is not driven, it appears High internally. TDMA Terminate DMA (input/output, synchronous) This signal is either an input or an output as controlled by the corresponding DMA Control Register. As an input, this signal can be asserted during an external DMA transfer (non-fly-by) to terminate the transfer after the current access. The TDMA input is ignored during fly-by transfers. As an output, this signal is asserted to indicate the final transfer of a sequence. TDO Test Data Output (three-state output, synchronous to TCK) This output supplies data from the test logic to an external destination. It changes on the falling edge of TCK. It is in the high-impedance state except when scanning is in progress. TMS RXDA Receive Data, Port A (input, asynchronous) This input is used to receive serial data to Serial Port A. Test Mode Select (input, synchronous to TCK, pull-up resistor) RXDB This input is used to control the Test Access Port. If it is not driven, it appears High internally. Receive Data, Port B (input, asynchronous) TR/OE This input is used to receive data to Serial Port B. This signal is supported on the Am29240EH and Am29243EH microcontrollers only. Video DRAM Transfer/Output Enable (output, synchronous) STAT2-STAT0 CPU Status (output, synchronous) These outputs indicate information about the processor or the current access for the purposes of hardware debug. This signal is used with video DRAMs to transfer data to the video shift register. It is also used as an output enable in normal video DRAM read cycles. This signal is supported on the Am29240EH and Am29245EH microcontrollers only. TRAP1-TRAP0 Trap Requests 1-0 (input, asynchronous, internal pull-ups) TCK Test Clock Input (input, asynchronous, pull-up resistor) This input is used to operate the Test Access Port. The state of the Test Access Port must be held if this clock is held either High or Low. This clock is internally synchronized to MEMCLK for certain operations of the Test Access Port controller, so signals internally driven and sampled by the Test Access Port are synchronous to processor internal clocks. These inputs generate prioritized trap requests. The trap caused by TRAP0 has the highest priority. These trap requests are disabled by the DA bit of the Current Processor Status Register. These signals have special hardening against metastable states, allowing them to be driven with slow-transition-time signals. Am29240 EH Microcontroller Series 13 PRELIMINARY This input is asserted to force all processor outputs into the high-impedance state. This signal is tied High through an internal pull-up resistor. For external DMA accesses, the number of wait states taken by the DRAM controller (this includes peripheral read and write wait states during DMA transfers) is determined by the actual value in the DMAWAIT field of the DMA Control Register or the number of wait states specified by the IOWAIT field in the PIA Control Register, whichever is greater. TRST WARN Test Reset Input (input, asynchronous, pull-up resistor) Warn (input, asynchronous, edge-sensitive, internal pull-up) This input asynchronously resets the Test Access Port. If TRST is not driven, it appears High internally. TRST must be tied to RESET, even if the Test Access Port is not being used. This output is used to transmit serial data from Serial Port A. A High-to-Low transition on this input causes a nonmaskable WARN trap to occur. This trap bypasses the normal trap vector fetch sequence, and is useful in situations where the vector fetch may not work (e.g., when data memory is faulty). This signal has special hardening against metastable states, allowing it to be driven with a slow-transition-time signal. WARN must be held active for at least four system clocks for the processor to recognize it. TXDB WE Transmit Data, Port B (output, asynchronous) Write Enable (output, synchronous) This output is used to transmit data from Serial Port B. This signal is supported on the Am29240EH and Am29243EH microcontrollers only. This signal is used to write the selected DRAM bank. "Early write" cycles are used so the DRAM data inputs and outputs can be tied to the common ID Bus. UCLK PRODUCT ENHANCEMENTS Programmable DRAM Timing TRIST Three-State Control (input, asynchronous, pull-up resistor) TXDA Transmit Data, Port A (output, asynchronous) UART Clock (input) This is an oscillator input for generating the UART (Serial Port) clock. To generate the UART clock, the oscillator frequency may be divided by any amount up to 65,536. The UART clock operates at 16 times the Serial Port's baud rate. As an option, UCLK may be driven with MEMCLK or INCLK. It can be driven with TTL levels. VCLK Video Clock (input, asynchronous) This clock is used to synchronize the transfer of video data. As an option, VCLK may be driven with MEMCLK or INCLK. It can be driven with TTL levels. This signal is supported on the Am29240EH and Am29245EH microcontrollers only. VDAT Through Bit 24 in the DRAM Control Register, the DRAM controller now supports programmable DRAM timing, for either two- or three-cycle simple accesses, with single-cycle page-mode accesses. The new bit defined below. Bit 24: Programmable DRAM Timing (PDT)--A 1 in this bit sets the DRAM timing to 2/1, for two-cycle simple accesses and single-cycle page-mode accesses. A 0 in this bit sets the DRAM timing to 3/1, for three-cycle simple accesses and single-cycle page-mode accesses. FEATURES NO LONGER SUPPORTED The following features are no longer supported on the Am29240EH, Am29245EH, and Am29243EH microcontrollers: Video Data (input/output, synchronous to VCLK) 33 MHz operating frequency This is serial data to or from the video device. This signal is supported on the Am29240EH and Am29245EH microcontrollers only. Scalable Clocking technology (also known as turbo mode or clock doubling) WAIT MEMDRV signal Add Wait States (input, synchronous, internal pull-up) 16-bit DRAM memory MEMCLK as an input External accesses are normally timed by the processor. However, the WAIT signal may be asserted during a PIA, ROM, or DMA access to extend the access indefinitely. 14 Am29240 EH Microcontroller Series PRELIMINARY 208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 CONNECTION DIAGRAM 208-Pin PQFP Top Side View Am29240EH Microcontroller Series 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Note: Pin 1 is marked for orientation. Am29240 EH Microcontroller Series 15 PRELIMINARY AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAA AAAAAA AAAAA AAAAAA AAAA AAAAAA AAAA AAAAAA PQFP PIN DESIGNATIONS (Pin Number) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Pin Name Reserved MEMCLK MEMDRV INCLK VCC GND ID31 ID30 ID29 ID28 ID27 ID26 ID25 ID24 GND VCC ID23 ID22 ID21 ID20 ID19 ID18 ID17 ID16 GND VCC ID15 ID14 ID13 ID12 ID11 ID10 ID9 ID8 GND VCC ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 GND VCC IDP3 1, 3 IDP2 1, 3 IDP1 1, 3 IDP0 1, 3 Pin No. 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 Pin Name Reserved VCC GND Reserved TXDB 3 RXDB 3 DTRA RXDA UCLK DSRA TXDA ROMCS3 ROMCS2 ROMCS1 ROMCS0 VCC GND BURST RSWE ROMOE RAS3 RAS2 RAS1 RAS0 CAS3 CAS2 VCC GND CAS1 CAS0 TR/ OE WE GACK PIACS5 PIACS4 PIACS3 PIACS2 VCC GND PIACS1 PIACS0 PIAWE PIAOE R/ W DACKB DACKA DACKD 3 DACKC 3 VCC GND 51 GND 103 Reserved 52 Reserved 104 Reserved Notes: 1. Defined as no-connect on Am29240EH microcontroller. 16 Pin No. 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 Pin Name Reserved VCC GND Reserved A23 A22 A21 A20 A19 A18 A17 A16 GND VCC A15 A14 A13 A12 A11 A10 A9 A8 GND VCC A7 A6 A5 A4 A3 A2 A1 A0 GND VCC BOOTW WAIT PAUTOFD PSTROBE PWE POE PACK PBUSY GND VCC PIO15 PIO14 PIO13 DREQD 3 DREQC 3 GND Pin No. 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 Pin Name Reserved VCC GND PIO12 PIO11 PIO10 PIO9 PIO8 PIO7 PIO6 PIO5 PIO4 GND VCC PIO3 PIO2 PIO1 PIO0 TDO STAT2 STAT1 STAT0 VDAT 2 PSYNC 2 GND VCC GREQ DREQB DREQA TDMA TRAP0 TRAP1 INTR0 INTR1 INTR2 INTR3 GND VCC WARN VCLK 2 LSYNC 2 TMS TRST TCK TDI RESET CNTL1 CNTL0 TRIST VCC 155 VCC 207 GND 156 Reserved 208 Reserved 2. Defined as no-connect on Am29243EH microcontroller. 3. Defined as no-connect on Am29245EH microcontroller. Am29240 EH Microcontroller Series PRELIMINARY AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAA AAAAAA AAAAA AAAAA AAAAA PQFP PIN DESIGNATIONS (Pin Name) Pin Name Pin No. Pin Name Pin No. A0 136 GND 91 A1 135 GND 102 A2 134 GND 107 A3 133 GND 117 A4 132 GND 127 A5 131 GND 137 A6 130 GND 147 A7 129 GND 154 A8 126 GND 159 A9 125 GND 169 A10 124 GND 181 A11 123 GND 193 A12 122 GND 207 A13 121 Reserved 208 A14 120 GREQ 183 A15 119 ID0 44 A16 116 ID1 43 A17 115 ID2 42 A18 114 ID3 41 A19 113 ID4 40 A20 112 ID5 39 A21 111 ID6 38 A22 110 ID7 37 A23 109 ID8 34 BOOTW 139 ID9 33 BURST 70 ID10 32 CAS0 82 ID11 31 CAS1 81 ID12 30 CAS2 78 ID13 29 CAS3 77 ID14 28 CNTL0 204 ID15 27 CNTL1 203 ID16 24 DACKA 98 ID17 23 DACKB 97 ID18 22 DACKC 3 100 ID19 21 3 DACKD 99 ID20 20 DREQA 185 ID21 19 DREQB 184 ID22 18 DREQC 3 153 ID23 17 DREQD 3 152 ID24 14 DSRA 62 ID25 13 DTRA 59 ID26 12 GACK 85 ID27 11 GND 6 ID28 10 GND 15 ID29 9 GND 25 ID30 8 GND 35 ID31 7 1, 3 GND 45 IDP0 50 GND 51 IDP1 1, 3 49 GND 55 IDP2 1, 3 48 GND 69 IDP3 1, 3 47 GND 80 INCLK 4 Notes: 1. Defined as no-connect on Am29240EH microcontroller. Pin Name Pin No. Pin Name Pin No. INTR0 189 RESET 202 INTR1 190 ROMCS0 67 INTR2 191 ROMCS1 66 INTR3 192 ROMCS2 65 2 LSYNC 197 ROMCS3 64 MEMCLK 2 ROMOE 72 MEMDRV 3 RSWE 71 PACK 145 RXDA 60 PAUTOFD 141 RXDB 3 58 PBUSY 146 STAT0 178 PIACS0 93 STAT1 177 PIACS1 92 STAT2 176 PIACS2 89 TCK 200 PIACS3 88 TDI 201 PIACS4 87 TDMA 186 PIACS5 86 TDO 175 PIAOE 95 TMS 198 PIAWE 94 TR/OE 83 PIO0 174 TRAP0 187 PIO1 173 TRAP1 188 PIO2 172 TRIST 205 PIO3 171 TRST 199 PIO4 168 TXDA 63 3 PIO5 167 TXDB 57 PIO6 166 UCLK 61 PIO7 165 Reserved 1 PIO8 164 VCC 5 PIO9 163 VCC 16 PIO10 162 VCC 26 PIO11 161 VCC 36 PIO12 160 VCC 46 PIO13 151 VCC 54 PIO14 150 VCC 68 PIO15 149 VCC 79 POE 144 VCC 90 PSTROBE 142 VCC 101 PSYNC 2 180 VCC 106 PWE 143 VCC 118 R/W 96 VCC 128 RAS0 76 VCC 138 RAS1 75 VCC 148 RAS2 74 VCC 155 RAS3 73 VCC 158 Reserved 52 VCC 170 Reserved 53 VCC 182 Reserved 56 VCC 194 Reserved 103 VCC 206 2 Reserved 104 VCLK 196 Reserved 105 VDAT 2 179 Reserved 108 WAIT 140 Reserved 156 WARN 195 Reserved 157 WE 84 2. Defined as no-connect on Am29243EH microcontroller. 3. Defined as no-connect on Am29245EH microcontroller. Am29240 EH Microcontroller Series 17 PRELIMINARY Am29240EH MICROCONTROLLER LOGIC SYMBOL INCLK MEMDRV 2 TRIST CNTL1-CNTL0 3 A23-A0 24 R/ W RESET WARN ROMCS3-ROMCS0 INTR3-INTR0 4 2 STAT2-STAT0 4 ROMOE RSWE BURST TRAP1-TRAP0 WAIT RAS3-RAS0 4 CAS3-CAS0 4 BOOTW WE TR/ OE PIACS5-PIACS0 Am29240EH Microcontroller 4 PIAOE PIAWE DACKD-DACKA DREQD-DREQA GREQ PBUSY PACK POE PWE UCLK RXDB-RXDA DTRA TXDB-TXDA DSRA VCLK LSYNC TCK TDI TMS TRST TDO MEMCLK VDAT PSYNC TDMA 18 4 GACK PSTROBE PAUTOFD 2 6 PIO15-PIO0 ID31-ID0 16 32 Am29240 EH Microcontroller Series 2 PRELIMINARY Am29245EH MICROCONTROLLER LOGIC SYMBOL INCLK MEMDRV 2 TRIST CNTL1-CNTL0 3 A23-A0 24 R/ W RESET WARN ROMCS3-ROMCS0 INTR3-INTR0 4 2 STAT2-STAT0 4 ROMOE RSWE BURST TRAP1-TRAP0 WAIT RAS3-RAS0 4 CAS3-CAS0 4 BOOTW WE TR/ OE PIACS5-PIACS0 PIAOE PIAWE Am29245EH Microcontroller 2 6 DACKB-DACKA DREQB-DREQA GREQ 2 GACK PBUSY PACK POE PWE PSTROBE PAUTOFD UCLK RXDA DTRA TXDA DSRA VCLK LSYNC TCK TDI TMS TRST TDO MEMCLK VDAT PSYNC TDMA PIO15-PIO0 ID31-ID0 16 32 Am29240 EH Microcontroller Series 19 PRELIMINARY Am29243EH MICROCONTROLLER LOGIC SYMBOL INCLK MEMDRV 2 TRIST CNTL1-CNTL0 STAT2-STAT0 3 A23-A0 24 R/ W RESET WARN ROMCS3-ROMCS0 INTR3-INTR0 4 2 4 ROMOE RSWE BURST TRAP1-TRAP0 WAIT RAS3-RAS0 4 CAS3-CAS0 4 BOOTW WE TR/ OE PIACS5-PIACS0 Am29243EH Microcontroller 4 PIAOE PIAWE DACKD-DACKA DREQD-DREQA GREQ PBUSY PACK POE PWE UCLK RXDB-RXDA DTRA TXDB-TXDA DSRA TCK TDI TMS TRST MEMCLK TDO TDMA PIO15-PIO0 16 20 4 GACK PSTROBE PAUTOFD 2 6 ID31-ID0 32 Am29240 EH Microcontroller Series IDP3-IDP0 4 2 PRELIMINARY ABSOLUTE MAXIMUM RATINGS OPERATING RANGES Storage Temperature . . . . . . . . . . . . -65C to +125C Voltage on any Pin with Respect to GND . . . . . . . . . -0.5 V to VCC +2.4 Commercial (C) Devices Stresses above those listed under Absolute Maximum Ratings may cause permanent device failure. Functionality at or above these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. Case Temperature (TC) . . . . . . . . . . . . . . 0C to +85C Supply Voltage (VCC) . . . . . . . . . . . . . . . +3 V to +3.6 V Operating ranges define those limits between which the functionality of the device is guaranteed. DC CHARACTERISTICS over COMMERCIAL Operating Ranges Preliminary Symbol Parameter Description VIL Test Conditions Min Max Unit Input Low Voltage -0.5 0.8 V VIH Input High Voltage 2.0 VCC +2.4 V VILINCLK INCLK Input Low Voltage -0.5 0.8 V VIHINCLK INCLK Input High Voltage 2.4 5.5 V VOL Output Low Voltage for All Outputs except MEMCLK IOL = 3.2 mA 0.5 V VOH Output High Voltage for All Outputs except MEMCLK IOH = -400 A ILI Input Leakage Current 0.45 V VIN VCC -0.45 V Note 1 ILO Output Leakage Current 0.45 V VOUT VCC -0.45 V ICCOP Operating Power-Supply Current with respect to MEMCLK VCC = 3.6 V, Outputs Floating; Holding RESET active at 25 MHz VOLC MEMCLK Output Low Voltage IOLC = 20 mA VOHC MEMCLK Output High Voltage IOHC = -20 mA 2.4 V IOSGND MEMCLK GND Short Circuit Current VCC = 3.3 V 100 mA IOSVCC MEMCLK VCC Short Circuit Current VCC = 3.3 V 100 mA 2.4 V 10 or +10/-200 A 10 A 8 mA/MHz 0.6 V Notes: 1. The Low input leakage current for the inputs CNTL1-CNTL0, INTR3-INTR0, TRAP1-TRAP0, DREQD-DREQA, TCK, TDI, RESET, TRST, TMS, GREQ, WARN, MEMDRV, WAIT, and TRIST is -200 A. These pins have internal pull-up resistors. CAPACITANCE Preliminary Symbol Parameter Description CIN Test Conditions Max Unit Input Capacitance 15 pF CINCLK INCLK Input Capacitance 15 pF CMEMCLK MEMCLK Capacitance 20 pF COUT Output Capacitance 20 pF CI/O I/O Pin Capacitance 20 pF fC = 10 MHz Min Note: Limits guaranteed by characterization. Am29240 EH Microcontroller Series 21 PRELIMINARY SWITCHING CHARACTERISTICS over COMMERCIAL Operating Ranges Preliminary 16 MHz No. Test Conditions 1 Parameter Description 20 MHz 25 MHz Min Max Min Max Min Max Unit 50 25 50 20 50 ns 1 INCLK Period (=0.5T) 30 2 INCLK High Time 10 8 6 ns 3 INCLK Low Time 10 8 6 ns 4 INCLK Rise Time 0 5 0 5 0 5 ns 5 INCLK Fall Time 0 5 0 5 0 5 ns 6 MEMCLK Delay from INCLK Note 1C, 3 1 7 1 7 1 7 ns 8 MEMCLK High Time Note 1C 0.5T-3 0.5T-3 0.5T-3 ns 9 MEMCLK Low Time Note 1C 0.5T-3 0.5T-3 0.5T-3 ns 10 MEMCLK Rise Time Note 1C 1 4 1 4 1 4 ns 11 MEMCLK Fall Time Note 1C 1 4 1 4 1 4 ns 12a 12b Synchronous Output Valid Delay from MEMCLK Rising Edge PIO15-PIO0, STAT2-STAT0, PIACS5-PIACS0, and RAS3-RAS0 Note 1A 1 13 1 12 1 11 ns CAS3-CAS0 Rising Edge/ CAS3-CAS0 Falling Edge Notes 1B, 4B 1 17/11 1 15/9 1 13/7 ns All others Note 1B 1 12 1 11 1 10 ns Synchronous Output Valid Delay from MEMCLK Falling Edge PIO15-PIO0, STAT2-STAT0, PIACS5-PIACS0 Note 1A 1 12 1 11 1 10 ns RAS3-RAS0 Note 1B 1 15 1 14 1 13 ns CAS3-CAS0 Falling Edge Notes 1B, 4B 1 11 1 9 1 7 ns All others Note 1B 1 11 1 10 1 9 ns 1 12 1 11 1 10 ns 13 Synchronous Output Disable Delay from MEMCLK Rising Edge 14 Synchronous Input Setup Time to MEMCLK Rising Edge ID31-ID0 and IDP3-IDP0 for DRAM access Parity Enabled Note 4A 18 16 15 ID31-ID0 for DRAM access Parity Disabled Note 4A 10 8 7 10 8 7 All others 15 Available CAS Access Time (TCAS-TSetup) Note 4B 16a Synchronous Input Hold Time to MEMCLK Rising Edge Note 4A 0 0 0 16b Synchronous Input Hold Time to CAS Rising Edge Note 4B 3 3 3 22 25 Am29240 EH Microcontroller Series 24 ns ns ns 19 ns ns ns PRELIMINARY SWITCHING CHARACTERISTICS over COMMERCIAL Operating Ranges (continued) Preliminary 16 MHz Test Conditions 1 No. Parameter Description 17 Asynchronous Input Pulse Width LSYNC and PSYNC All others Min Max 20 MHz Min Max 25 MHz Min Max Unit Note 5 Note 5 Note 5 4T 4T 4T ns UCLK Period Note 2 30 25 20 ns VCLK Period Note 2 25 20 15 ns UCLK High Time Note 2 10 8 6 ns VCLK High Time Note 2 8 6 4 ns UCLK Low Time Note 2 10 8 6 ns VCLK Low Time Note 2 8 6 4 ns UCLK Rise time Note 2 0 5 0 5 0 5 ns VCLK Rise time Note 2 0 3 0 3 0 3 ns UCLK Fall Time Note 2 0 5 0 5 0 5 ns VCLK Fall Time Note 2 0 3 0 3 0 3 ns 23 Synchronous Output Valid Delay from VCLK Rise and Fall Note 6 1 16 1 14 1 14 ns 24 Input Setup Time to VCLK Rise and Fall Notes 6, 7 10 9 9 ns 25 Input Hold Time to VCLK Rise and Fall Notes 6, 7 0 0 0 ns 26 RAS Low Time 50 50 50 ns 27 CAS Low Time 13 13 13 ns 18 19 20 21 22 Notes: 1. All outputs driving 80 pF, measured at VOL = 1.5 V and VOH = 1.5 V using the switching test circuit shown on page 33. For higher capacitance loads: A. Add 1 ns output delay per 15 pF loading above 80 pF, up to 150 pF total. The minimum delay from PIAOE to PIACSx is 0 ns if the capacitance loading on PIACSx is equal to or higher than the capacitance loading on PIAOE. B. Add 1 ns output delay per 25 pF loading above 80 pF, up to 300 pF total. For 2/1 DRAM timing, in order to meet the setup time (tASR ) from A23-A0 to RAS3-RAS0 for DRAM, the capacitive loading of A23-A0 must not exceed the capacitance loading of RAS3-RAS0 by more than 150 pF. C. Add 1 ns of output delay for MEMCLK to drive an external load of 100 pF. 2. VCLK and UCLK can be driven with TTL inputs. UCLK must be tied High if it is unused. 3. Maximum INCLK-to-MEMCLK delay can be decreased by 0.5 ns for each 10 mA increase in IOL up to the maximum of 20 mA, i.e., 6 ns maximum delay at IOL = 20 mA. 4. ID31-ID0 and IDP3-IDP0 are sampled on the rising edge of MEMCLK for all non-DRAM accesses, simple DRAM accesses, and the first access of a DRAM page-mode access. ID31-ID0 and IDP3-IDP0 are sampled on the rising edge of CASx for all DRAM page-mode accesses, except the first access of a DRAM page-mode access. (See Figures 1-12 on pages 25-32.) A. Applies to ID31-ID0 and IDP3-IDP0 for simple DRAM accesses and the first access of a DRAM page-mode access. B. Applies to ID31-ID0 and IDP3-IDP0 for DRAM page-mode accesses, except the first access of a DRAM page-mode access. When ID31-ID0 and IDP3-IDP0 are sampled on CASx, there is no additional setup time required for ID31-ID0 and IDP3-IDP0 when the parity is enabled. 5. LSYNC and PSYNC minimum width is two bit-times. A bit-time is one period of the internal video clock, which is determined by the CLKDIV field in the Video Control Register and VCLK. 6. Active VCLK edge depends on the CLKI bit in the Video Control Register. 7. LSYNC and PSYNC can be treated as synchronous signals by meeting the setup and hold times, though the synchronization delay still applies. Am29240 EH Microcontroller Series 23 PRELIMINARY SWITCHING WAVEFORMS 1 3 2 4 5 2.0 V 1.5 V 0.8 V INCLK 6 8 9 10 11 VCC -0.6 V 1.5 V 0.8 V MEMCLK 12a SYNCHRONOUS OUTPUTS 12b 13 1.5 V 14 SYNCHRONOUS INPUTS 1.5 V 16a 1.5 V 15 CASx Note: See Note 4 on page 23. 16b 17 ASYNCHRONOUS INPUTS 1.5 V 1.5 V 18 19 21 UCLK, VCLK 20 22 2.0 V 1.5 V 0.8 V 23 VCLK-RELATIVE OUTPUTS 25 24 VCLK-RELATIVE INPUTS 1.5 V 1.5 V Note: During AC testing, all inputs are driven at VIL = 0.4 V, VIH = 2.4 V. 24 Am29240 EH Microcontroller Series Note: Video Timing may be relative to VCLK falling edge if CLK = 1. PRELIMINARY SWITCHING WAVEFORMS (continued) 1.5 V MEMCLK A14-A1 Row Address Column Address R/W RAS3-RAS0 CAS3-CAS0 WE TR/OE 16a 14 ID31-ID0 IDP3-IDP0 1.5 V 1.5 V Note: The RAS3-RAS0 signals are asserted and deasserted on the falling edge of MEMCLK. Figure 1. Simple 3/1 DRAM Read Cycle MEMCLK A14-A1 Row Address Column Address R/W RAS3-RAS0 CAS3-CAS0 WE TR/OE ID31-ID0 IDP3-IDP0 Data Figure 2. Simple 3/1 DRAM Write Cycle Am29240 EH Microcontroller Series 25 PRELIMINARY SWITCHING WAVEFORMS (continued) 1.5 V MEMCLK A14-A1 Row Address +2/4 +4/8 +6/12 1.5 V 1.5 V 1.5 V Column Address R/W RAS3-RAS0 CAS3-CAS0 1.5 V WE TR/OE 15 + T/2 ID31-ID0 IDP3-IDP0 1.5 1.5VV 16b 15 16b 1.5 V 1.5 V 15 16b 16b 15 1.5 V 1.5 V Note: The RAS3-RAS0 signals are asserted and deasserted on the falling edge of MEMCLK. Figure 3. 3/1 DRAM Page-Mode Read MEMCLK A14-A1 Row Address Column Address +2/4 +4/8 +6/12 R/W RAS3-RAS0 CAS3-CAS0 WE TR/OE ID31-ID0 IDP3-IDP0 Data Data Data Figure 4. 3/1 DRAM Page-Mode Write 26 Am29240 EH Microcontroller Series Data PRELIMINARY SWITCHING WAVEFORMS (continued) MEMCLK A14-A1 1.5 V Row Addr Column Address R/W RAS3-RAS0 CAS3-CAS0 WE TR/OE 14 ID31-ID0 IDP3-IDP0 1.5 V 16a 1.5 V Figure 5. Simple 2/1 DRAM Read Cycle MEMCLK A14-A1 Row Addr Column Address R/W RAS3-RAS0 CAS3-CAS0 WE TR/OE ID31-ID0 IDP3-IDP0 Data Figure 6. Simple 2/1 DRAM Write Cycle Am29240 EH Microcontroller Series 27 PRELIMINARY SWITCHING WAVEFORMS (continued) MEMCLK A14-A1 1.5 V Row Addr Column Address +2/4 +4/8 +6/12 R/W RAS3-RAS0 CAS3-CAS0 1.5 V 1.5 V 1.5 V 1.5 V WE TR/OE 15 + T/2 1.5 V ID31-ID0 IPD3-IDP0 16b 15 16b 15 1.5 V 1.5 V 16b 15 16b 1.5 V 1.5 V Note: May be repeated up to 1-Kbyte address boundary. Figure 7. 2/1 DRAM Page-Mode Read Cycle MEMCLK A14-A1 Row Addr Column Address +2/4 +4/8 +6/12 Data Data Data R/W RAS3-RAS0 CAS3-CAS0 WE TR/OE ID31-ID0 IDP3-IDP0 Data Note: May be repeated up to 1-Kbyte address boundary. Figure 8. 2/1 DRAM Page-Mode Write Cycle 28 Am29240 EH Microcontroller Series PRELIMINARY SWITCHING WAVEFORMS (continued) MEMCLK DREQx DACKx A14-A1 Row Addr Col Addr Col Addr Row Addr Col Addr R/W RASx CASx WE TR/OE ID31-ID0 Data Data Data PIACSx PIAOE PIAWE Note: May be repeated up to 1-Kbyte address boundary. Figure 9. Fly-By DMA Reads (Read Peripheral, Write DRAM)--3/1 DRAM Accesses Am29240 EH Microcontroller Series 29 PRELIMINARY SWITCHING WAVEFORMS (continued) MEMCLK DREQx DACKx A14-A1 Row Addr Col Addr Col Addr Row Addr Col Addr R/W RASx CASx WE TR/OE ID31-ID0 Data Data Data PIACSx PIAOE PIAWE Note: May be repeated up to 1-Kbyte address boundary. Figure 10. Fly-By DMA Writes (Read DRAM, Write Peripheral)--3/1 DRAM Accesses 30 Am29240 EH Microcontroller Series PRELIMINARY SWITCHING WAVEFORMS (continued) MEMCLK DREQx DACKx A14-A1 Row Addr Col Addr Col Addr Row Addr Col Addr R/W RASx CASx WE TR/OE ID31-ID0 Data Data Data PIACSx PIAOE PIAWE Note: May be repeated up to 1-Kbyte address boundary. Figure 11. Fly-By DMA Reads (Read Peripheral, Write DRAM)--2/1 DRAM Accesses Am29240 EH Microcontroller Series 31 PRELIMINARY SWITCHING WAVEFORMS (continued) MEMCLK DREQx DACKx Row Addr A14-A1 Col Addr Col Addr Row Addr Col Addr R/W RASx CASx WE TR/OE ID31-ID0 Data Data Data PIACSx PIAOE PIAWE Note: May be repeated up to 1-Kbyte address boundary. Figure 12. Fly-By DMA Writes (Read DRAM, Write Peripheral)--2/1 DRAM Accesses 32 Am29240 EH Microcontroller Series PRELIMINARY SWITCHING TEST CIRCUIT VL IOL = 3.2 mA * CL V Am29240EH Microcontroller Pin Under Test VREF = 1.5 V IOH = 400 A * VH Note: *All outputs except MEMCLK. MEMCLK is tested with IOL = 20 mA and IOH = -20mA. THERMAL CHARACTERISTICS The Am29240EH microcontroller series is specified for operation with case temperature ranges for a commercial temperature device. Case temperature is measured at the top center of the PQFP package as shown in Figure 13. The various temperatures and thermal resistances can be determined using the equations shown in Figure 14 along with information given in Table 2. (The variable P is power in watts.) JA = JC + CA JA P = ICCOP freq VCC TJ = TC + P JC CA TC TJ = TA + P JA JC EEEE TC = TJ - P JC TC = TA + P CA TA = TJ - P JA TA = TC - P CA JA = JC + CA Figure 13. Thermal Resistance -- C/Watt Figure 14. Thermal Characteristics Equations Table 2. Thermal Characteristics (C/Watt) Surface Mounted Parameter C/Watt JA Junction-to-Ambient 38 JC Junction-to-Case 8 CA Case-to-Ambient 30 Am29240 EH Microcontroller Series 33 PRELIMINARY PHYSICAL DIMENSIONS PQR 208, Trimmed and Formed Plastic Quad Flat Pack 30.40 30.80 27.90 28.10 Pin 208 25.50 Ref. Pin 156 Pin 1 I.D. 25.50 Ref. -B- -A- 27.90 28.10 30.40 30.80 Pin 52 -D- Pin 104 Top View See Detail X 0.50 Basic S 3.95 Max. 3.20 3.60 0.25 Min. -C- S Side View Notes: All measurements are in millimeters unless otherwise noted. Not to scale. For reference only. 34 -A- Am29240 EH Microcontroller Series Seating Plane PRELIMINARY PQR 208 (continued) 0.20 Min. Flat Shoulder 7 Typ. 0 Min. 0.300.05 R Gage Plane 3.95 Max 0.25 0.50 0.75 7 Typ. 0.13 0.20 0-7 0.18 0.30 Detail X 0.18 0.30 0.13 0.20 Section S-S Notes: All measurements are in millimeters unless otherwise noted. Not to scale. For reference only. Am29240 EH Microcontroller Series 35 PRELIMINARY PHYSICAL DIMENSIONS (continued) Solder Land Recommendations--208-Lead PQFP 31.60 Ref. 1.80 Typ. 28.00 Typ. 0.50 Typ. 25.50 Typ. 0.30 Typ. 29.80 Ref. Notes: All measurements are in millimeters unless otherwise noted. Not to scale. For reference only. Trademarks Copyright 1997 Advanced Micro Devices, Inc. All rights reserved. AMD, the AMD logo, Am29000, MiniMON29K, and Fusion29K are registered trademarks; 29K, AMD Facts-On-Demand, Am29005, Am29030, Am29035, Am29040, Am29050, Am29200, Am29202, Am29205, Am29240, Am29243, Am29245, and Traceable Cache are trademarks of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. 36 Am29240 EH Microcontroller Series