AT91M40008 - Atmel Corporation

Features

•Incorporates the ARM7TDMI™ARM®Thumb®Processor Core

– High-performance 32-bit RISC Architecture

– High-density 16-bit Instruction Set

– Leader in MIPS/Watt

– Little-endian

– Embedded ICE (In-circuit Emulation)

•8-, 16- and 32-bit Read and Write Support

•256K Bytes of On-chip SRAM

–32-bitDataBus

– Single-clock Cycle Access

•Fully Programmable External Bus Interface (EBI)

– Maximum External Address Space of 64M Bytes

– UptoEightChipSelects

– Software Programmable 8/16-bit External Data Bus

•Eight-level Priority, Individually Maskable, Vectored Interrupt Controller

– Four External Interrupts, including a High-priority, Low-latency Interrupt Request

•32 Programmable I/O Lines

•Three-channel 16-bit Timer/Counter

– Three External Clock Inputs

– Two Multi-purpose I/O Pins per Channel

•Two USARTs

– Two Dedicated Peripheral Data Controller (PDC) Channels per USART

•Programmable Watchdog Timer

•Advanced Power-saving Features

– CPU and Peripheral Can be Deactivated Individually

•Fully Static Operation:

– 0 Hz to 70 MHz Internal Frequency Range at VDDCORE = 1.65V, 85°C

•2.7V to 3.6V I/O Operating Range

•1.65V to 1.95V Core Operating Range

•-40°Cto+85°C Temperature Range

•Available in 100-lead TQFP Package

Description

The AT91R40008 microcontroller is a member of the Atmel AT91 16/32-bit microcon-

troller family, which is based on the ARM7TDMI processor core. This processor has a

high-performance, 32-bit RISC architecture with a high-density, 16-bit instruction set

and very low power consumption. Furthermore, it features 256K bytes of on-chip

SRAM and a large number of internally banked registers, resulting in very fast excep-

tion handling, and making the device ideal for real-time control applications.

The AT91R40008 microcontroller features a direct connection to off-chip memory,

including Flash, through the fully programmable External Bus Interface (EBI). An 8-

level priority vectored interrupt controller, in conjunction with the Peripheral Data Con-

troller, significantly improves the real-time performance of the device.

The device is manufactured using Atmel’s high-density CMOS technology. By combin-

ing the ARM7TDMI processor core with a large, on-chip, high-speed SRAM and a

wide range of peripheral functions on a monolithic chip, the AT91R40008 is a powerful

microcontroller that offers a flexible and high-performance solution to many compute-

intensive embedded control applications.

AT91 ARM®

Thumb®

Microcontrollers

AT91R40008

Summary

Rev. 1732CS–ATARM–02/02

Note: This is a summary document. A complete document is

available on our web site at www.atmel.com.

2AT91R40008

1732CS–ATARM–02/02

Pin Configuration

Figure 1. AT91R40008 in 100-lead TQFP Package

P21/TXD1/NTRI

P20/SCK1

P19

P18

P17

P16

P15/RXD0

P14/TXD0

P13/SCK0

P12/FIQ

GND

P11/IRQ2

P10/IRQ1

VDDCORE

P9/IRQ0

P8/TIOB2

P7/TIOA2

P6/TCLK2

P5/TIOB1

P4/TIOA1

P3/TCLK1

GND

P2/TIOB0

P1/TIOA0

P0/TCLK0

D15

D14

D13

D12

VDDIO

D11

D10

GND

P31/A23/CS4

P30/A22/CS5

VDDIO

VDDCORE

P29/A21/CS6

P22/RXD1

NWR1/NUB

GND

NRST

NWDOVF

VDDIO

MCKI

P23

P24/BMS

P25/MCKO

GND

TMS

TDO

TCK

NRD/NOE

NWR0/NWE

VDDCORE

VDDIO

NWAIT

NCS0

NCS1

P26/NCS2

P27/NCS3

A0/NLB

A2A2

A10

A11

A12

A13

A14

GND

A15

A16

A17

A18

A19

P28/A20/CS7

GND

116

100

TDI

VDDIO

AT91R40008

1732CS–ATARM–02/02

Pin Description

Table 1. AT91R40008 Pin Description

Module Name Function Type

Active

Level Comments

EBI

A0 - A23 Address Bus Output –All valid after reset

D0 - D15 Data Bus I/O –

NCS0 - NCS3 Chip Select Output Low

CS4 - CS7 Chip Select Output High A23 - A20 after reset

NWR0 Lower Byte 0 Write Signal Output Low Used in Byte Write option

NWR1 Upper Byte 1 Write Signal Output Low Used in Byte Write option

NRD Read Signal Output Low Used in Byte Write option

NWE Write Enable Output Low Used in Byte Select option

NOE Output Enable Output Low Used in Byte Select option

NUB Upper Byte Select Output Low Used in Byte Select option

NLB Lower Byte Select Output Low Used in Byte Select option

NWAIT Wait Input Input Low

BMS Boot Mode Select Input –Sampled during reset

AIC FIQ Fast Interrupt Request Input –PIO-controlled after reset

IRQ0 - IRQ2 External Interrupt Request Input –PIO-controlled after reset

TCLK0 - TCLK2 Timer External Clock Input –PIO-controlled after reset

TIOA0 - TIOA2 Multipurpose Timer I/O pin A I/O –PIO-controlled after reset

TIOB0 - TIOB2 Multipurpose Timer I/O pin B I/O –PIO-controlled after reset

USART

SCK0 - SCK1 External Serial Clock I/O –PIO-controlled after reset

TXD0 - TXD1 Transmit Data Output Output –PIO-controlled after reset

RXD0 - RXD1 Receive Data Input Input –PIO-controlled after reset

PIO P0 - P31 Parallel IO line I/O –

WD NWDOVF Watchdog Overflow Output Low Open-drain

Clock MCKI Master Clock Input Input –Schmidt trigger

MCKO Master Clock Output Output –

Reset NRST Hardware Reset Input Input Low Schmidt trigger

NTRI Tri-state Mode Select Input Low Sampled during reset

ICE

TMS Test Mode Select Input –Schmidt trigger, internal pull-up

TDI Test Data Input Input –Schmidt trigger, internal pull-up

TDO Test Data Output Output –

TCK Test Clock Input –Schmidt trigger, internal pull-up

Power

VDDIO I/O Power Power –3V nominal supply

VDDCORE Core Power Power –1.8V nominal supply

GND Ground Ground –

4AT91R40008

1732CS–ATARM–02/02

Block Diagram

Figure 2. AT91R40008

ARM7TDMI Core

Embedded

ICE

Reset

EBI: External Bus Interface

ASB

Controller

Clock

AIC: Advanced

Interrupt Controller

AMBA Bridge

EBI User

Interface

TC: Timer

Counter

TC0

TC1

TC2

USART0

USART1

2 PDC

Channels

2 PDC

Channels

PIO: Parallel I/O Controller

PS: Power Saving

Chip ID

WD: Watchdog

Timer

APB

ASB

NRST

D0-D15

A1-A19

A0/NLB

NRD/NOE

NWR0/NWE

NWR1/NUB

NWAIT

NCS0

NCS1

P26/NCS2

P27/NCS3

P28/A20/CS7

P29/A21/CS6

P30/A22/CS5

P31/A23/CS4

P0/TCLK0

P3/TCLK1

P6/TCLK2

P1/TIOA0

P2/TIOB0

P4/TIOA1

P5/TIOB1

P7/TIOA2

P8/TIOB2

NWDOVF

TMS

TDO

TDI

TCK

MCKI

P25/MCKO

P12/FIQ

P9/IRQ0

P10/IRQ1

P11/IRQ2

P13/SCK0

P14/TXD0

P15/RXD0

P20/SCK1

P21/TXD1/NTRI

P22/RXD1

P16

P17

P18

P19

P23

P24/BMS

256K Bytes RAM

AT91R40008

1732CS–ATARM–02/02

Architectural

Overview

The AT91R40008 microcontroller integrates an ARM7TDMI with embedded ICE interface,

memories and peripherals. The architecture consists of two main buses: the Advanced Sys-

tem Bus (ASB) and the Advanced Peripheral Bus (APB). Designed for maximum performance

and controlled by the memory controller, the ASB interfaces the ARM7TDMI processor with

the on-chip 32-bit memories, the External Bus Interface (EBI) and the AMBA™Bridge. The

AMBA Bridge drives the APB, which is designed for accesses to on-chip peripherals and opti-

mized for low power consumption.

The AT91R40008 microcontroller implements the ICE port of the ARM7TDMI processor on

dedicated pins, offering a complete, low-cost and easy-to-use debug solution for target

debugging.

Memories The AT91R40008 microcontroller embeds 256K bytes of internal SRAM. The internal memory

is directly connected to the 32-bit data bus and is single-cycle accessible.

The AT91R40008 microcontroller features an External Bus Interface (EBI), which enables

connection of external memories and application-specific peripherals. The EBI supports 8- or

16-bit devices and can use two 8-bit devices to emulate a single 16-bit device. The EBI imple-

ments the early read protocol, enabling faster memory accesses than standard memory

interfaces.

Peripherals The AT91R40008 microcontrollers integrate several peripherals, that are classified as system

or user peripherals. All on-chip peripherals are 32-bit accessible by the AMBA Bridge, and can

be programmed with a minimum number of instructions. The peripheral register set consists of

control, mode, data, status and enable/disable/status registers.

An on-chip Peripheral Data Controller (PDC) transfers data between the on-chip USARTs and

on- and off-chip memories address space without processor intervention. Most importantly,

the PDC removes the processor interrupt handling overhead, making it possible to transfer up

to 64K contiguous bytes without reprogramming the start address, thus increasing the perfor-

mance of the microcontroller and reducing the power consumption.

System Peripherals The External Bus Interface (EBI) controls the external memory or peripheral devices via an 8-

or 16-bit data bus and is programmed through the Advanced Peripheral Bus (APB). Each chip

select line has its own programming register.

The Power-saving (PS) module implements the Idle mode (ARM7TDMI core clock stopped

until the next interrupt) and enables the user to adapt the power consumption of the microcon-

troller to application requirements (independent peripheral clock control).

The Advanced Interrupt Controller (AIC) controls the internal interrupt sources from the inter-

nal peripherals and the four external interrupt lines (including the FIQ) to provide an interrupt

and/or fast interrupt request to the ARM7TDMI. It integrates an 8-level priority controller and,

using the Auto-vectoring feature, reduces the interrupt latency time.

The Parallel Input/Output Controller (PIO) controls up to 32 I/O lines. It enables the user to

select specific pins for on-chip peripheral input/output functions and general-purpose

input/output signal pins. The PIO controller can be programmed to detect an interrupt on a sig-

nal change from each line.

The Watchdog (WD) can be used to prevent system lock-up if the software becomes trapped

in a deadlock.

The Special Function (SF) module integrates the Chip ID, the Reset Status and the Protect

registers.

6AT91R40008

1732CS–ATARM–02/02

User Peripherals Two independently configurable USARTs enable communication at a high baud rate in syn-

chronous or asynchronous mode. The format includes start, stop and parity bits and up to 8

data bits. Each USART also features a Time-out and a Time-guard register, facilitating the

use of the two dedicated Peripheral Data Controller (PDC) channels.

The 3-channel, 16-bit Timer/Counter (TC) is highly programmable and supports capture or

waveform modes. Each TC channel can be programmed to measure or generate different

kinds of waves, and can detect and control two input/output signals. The TC also has three

external clock signals.

AT91R40008

1732CS–ATARM–02/02

Associated Documentation

The AT91R40008 is part of the AT91X40 series of microcontrollers, a member of the Atmel AT91 16/32-bit microcontroller

family, which is based on the ARM7TDMI processor core. The table below contains details of associated documentation for

further reference.

Table 2. Associated Documentation

Product Information Document Title

AT91R40008

Internal architecture of processor

ARM/Thumb instruction sets

Embedded in-circuit-emulator

ARM7TDMI (Thumb) Datasheet

External memory interface mapping

Peripheral operations

Peripheral user interfaces

AT91x40 Series Datasheet

DC characteristics

Power consumption

Thermal and reliability considerations

AC characteristics

AT91R40008 Electrical Characteristics

Product overview

Ordering information

Packaging information

Soldering profile

AT91R40008 Summary Datasheet (this document)

8AT91R40008

1732CS–ATARM–02/02

Product Overview

Power Supply The AT91R40008 microcontroller has two types of power supply pins:

•VDDCORE pins, which power the chip core (i.e., the ARM7TDMI, embedded memory and

the peripherals).

•VDDIO pins, which power the I/O lines.

An independent I/O supply allows a flexible adaptation to external component signal levels.

Input/Output

Considerations

After the reset, the peripheral I/Os are initialized as inputs to provide the user with maximum

flexibility. It is recommended that in any application phase, the inputs to the AT91R40008

microcontroller be held at valid logic levels to minimize the power consumption.

Master Clock The AT91R40008 microcontroller has a fully static design and works on the Master Clock

(MCK) provided on the MCKI pin from an external source.

The Master Clock is also provided as an output of the device on the pin MCKO, which is multi-

plexed through a general-purpose I/O line. While NRST is active, MCKO remains low. After

the reset, the MCKO is valid and outputs an image of the MCK signal. The PIO controller must

be programmed to use this pin as standard I/O line.

Reset Reset restores the default states of the user interface registers (defined in the user interface of

each peripheral) and forces the ARM7TDMI to perform the next instruction fetch from address

zero. Except for the program counter, the ARM7TDMI registers do not have defined reset

states.

NRST Pin NRST is active low-level input. It is asserted asynchronously, but exit from reset is synchro-

nized internally to the MCK. The signal presented on MCKI must be active within the

specification for a minimum of 10 clock cycles up to the rising edge of NRST to ensure correct

operation.

The first processor fetch occurs 80 clock cycles after the rising edge of NRST.

Watchdog Reset The Watchdog can be programmed to generate an internal reset. In this case, the reset has

the same effect as the NRST pin assertion, but the pins BMS and NTRI are not sampled. Boot

Mode and Tri-state Mode are not updated. If the NRST pin is asserted and the Watchdog trig-

gers the internal reset, the NRST pin has priority.

Emulation

Functions

Tri-state Mode The AT91R40008 microcontroller provides a tri-state mode, which is used for debug purposes.

This enables the connection of an emulator probe to an application board without having to

desolder the device from the target board. In tri-state mode, all the output pin drivers of the

AT91R40008 microcontroller are disabled.

To enter tri-state mode, the NTRI pin must be held low during the last 10 clock cycles before

the rising edge of NRST. For normal operation, the NTRI pin must be held high during reset by

aresistorofupto400kΩ.

NTRI is multiplexed with I/O line P21 and USART1 serial data transmit line TXD1.

Standard RS-232 drivers generally contain internal 400 kΩpull-up resistors. If TXD1 is con-

nected to a device not including this pull-up, the user must make sure that a high level is tied

on NTRI while NRST is asserted.

AT91R40008

1732CS–ATARM–02/02

JTAG/ICE Debug ARM standard embedded in-circuit emulation is supported via the JTAG/ICE port. The pins

TDI, TDO, TCK and TMS are dedicated to this debug function and can be connected to a host

computer via the external ICE interface.

In ICE Debug mode, the ARM7TDMI core responds with a non-JTAG chip ID that identifies the

microcontroller. This is not fully IEEE1149.1 compliant.

Memory Controller The ARM7TDMI processor address space is 4G bytes. The memory controller decodes the

internal 32-bit address bus and defines three address spaces:

•Internal memories in the four lowest megabytes

•Middle space reserved for the external devices (memory or peripherals) controlled by the

EBI

•Internal peripherals in the four highest megabytes

In any of these address spaces, the ARM7TDMI operates in Little-endian mode only.

Internal Memories The AT91R40008 microcontroller integrates 256K bytes of internal SRAM. All internal memo-

ries are 32 bits wide and single-clock cycle accessible. Byte (8-bit), half-word (16-bit) or word

(32-bit) accesses are supported and are executed within one cycle. Fetching Thumb or ARM

instructions is supported and internal memory can store twice as many Thumb instructions as

ARM ones.

The SRAM is mapped at address 0x0 (after the Remap command), allowing ARM7TDMI

exception vectors between 0x0 and 0x20 to be modified by the software.

Placing the SRAM on-chip and using the 32-bit data bus bandwidth maximizes the microcon-

troller performance and minimizes the system power consumption. The 32-bit bus increases

the effectiveness of the use of the ARM instruction set and the ability of processing data that is

wider than 16-bit, thus making optimal use of the ARM7TDMI advanced performance.

Being able to dynamically update application software in the 256-Kbyte SRAM adds an extra

dimension to the AT91R40008.

Boot Mode Select The ARM reset vector is at address 0x0. After the NRST line is released, the ARM7TDMI exe-

cutes the instruction stored at this address. This means that this address must be mapped in

nonvolatile memory after the reset.

The input level on the BMS pin during the last 10 clock cycles before the rising edge of the

NRST selects the type of boot memory (see Table 3).

The BMS pin is multiplexed with the I/O line P24, which can be programmed after reset like

any standard PIO line.

Table 3. Boot Mode Select

BMS Boot Memory

1 External 8-bit memory on NCS0

0 External 16-bit memory on NCS0

10 AT91R40008

1732CS–ATARM–02/02

Remap Command The ARM vectors (Reset, Abort, Data Abort, Pre-fetch Abort, Undefined Instruction, Interrupt,

Fast Interrupt) are mapped from address 0x0 to address 0x20. In order to allow these vectors

to be redefined dynamically by the software, the AT91R40008 microcontroller uses a Remap

command that enables switching between the boot memory and the internal primary SRAM

bank addresses. The Remap command is accessible through the EBI User Interface by writing

one in RCB of EBI_RCR (Remap Control Register). Performing a Remap command is manda-

tory if access to the other external devices (connected to chip-selects 1 to 7) is required. The

Remap operation can only be changed back by an internal reset or an NRST assertion.

Abort Control The abort signal providing a Data Abort or a Pre-fetch Abort exception to the ARM7TDMI is

asserted when accessing an undefined address in the EBI address space.

No abort is generated when reading the internal memory or by accessing the internal peripher-

als, whether or not the address is defined.

External Bus Interface The External Bus Interface handles the accesses between addresses 0x0040 0000 and

0xFFC0 0000. It generates the signals that control access to the external devices, and can be

configured from eight 1M byte banks up to four 16M bytes banks. It supports byte-, half-word-

and word-aligned accesses.

For each of these banks, the user can program:

•Number of wait states

•Number of data float times (wait time after the access is finished to prevent any bus

contention in case the device is too long in releasing the bus)

•Data bus width (8-bit or 16-bit)

The user can program the EBI to control one 16-bit device (Byte Select Access mode) with a

16-bit wide data bus or two 8-bit devices in parallel that emulate a 16-bit memory (Byte Write

Access mode).

The External Bus Interface also features the Early Read Protocol, configurable for all the

devices, which significantly reduces access time requirements on an external device in the

case of single-clock cycle access.

AT91R40008

1732CS–ATARM–02/02

Peripherals The AT91R40008 microcontroller peripherals are connected to the 32-bit wide Advanced

Peripheral Bus. Peripheral registers are only word accessible –byte and half-word accesses

are not supported. If a byte or a half-word access is attempted, the memory controller auto-

matically masks the lowest address bits and generates a word access.

Each peripheral has a 16-Kbyte address space allocated (the AIC only has a 4-Kbyte address

space).

Peripheral Registers The following registers are common to all peripherals:

•Control Register –write-only register that triggers a command when a one is written to the

corresponding position at the appropriate address. Writing a zero has no effect.

•Mode Register –read/write register that defines the configuration of the peripheral.

Usually has a value of 0x0 after a reset.

•Data Registers –read and/or write registers that enable the exchange of data between the

processor and the peripheral.

•Status Register –read-only register that returns the status of the peripheral.

•Enable/Disable/Status Registers are shadow command registers. Writing a one in the

Enable Register sets the corresponding bit in the Status Register. Writing a one in the

Disable Register resets the corresponding bit and the result can be read in the Status

efficiency of bit manipulation and enables modification of a register with a single non-

interruptible instruction, replacing the costly read-modify-write operation.

Unused bits in the peripheral registers are shown as “–” and must be written at 0 for upward

compatibility. These bits read 0.

Peripheral Interrupt

Control

The Interrupt Control of each peripheral is controlled from the Status Register using the inter-

rupt mask. The Status Register bits are ANDed to their corresponding interrupt mask bits and

the result is then ORed to generate the Interrupt Source signal to the Advanced Interrupt

Controller.

The interrupt mask is read in the Interrupt Mask Register and is modified with the Interrupt

Enable Register and the Interrupt Disable Register. The enable/disable/status (or mask)

makes it possible to enable or disable peripheral interrupt sources with a non-interruptible sin-

gle instruction. This eliminates the need for interrupt masking at the AIC or Core level in real-

time and multi-tasking systems.

Peripheral Data

Controller

The AT91R40008 microcontroller has a 4-channel PDC dedicated to the two on-chip USARTs.

One PDC channel is dedicated to the receiver and one to the transmitter of each USART.

The user interface of a PDC channel is integrated in the memory space of each USART. It

contains a 32-bit Address Pointer Register (RPR or TPR) in addition to a 16-bit Transfer

Counter Register (RCR or TCR). When the programmed number of transfers are performed, a

status bit indicating the end of transfer is set in the USART Status Register and an interrupt

can be generated.

12 AT91R40008

1732CS–ATARM–02/02

System

Peripherals

PS: Power-saving The Power-saving feature optimizes power consumption, enabling the software to stop the

ARM7TDMI clock (Idle mode), restarting it when the module receives an interrupt (or reset). It

also enables on-chip peripheral clocks to be enabled and disabled individually, matching

power consumption and application need.

AIC: Advanced

Interrupt Controller

The Advanced Interrupt Controller has an 8-level priority, individually maskable, vectored

interrupt controller, and drives the NIRQ and NFIQ pins of the ARM7TDMI from:

•The external fast interrupt line (FIQ)

•The three external interrupt request lines (IRQ0 - IRQ2)

•The interrupt signals from the on-chip peripherals

The AIC is extensively programmable offering maximum flexibility, and its vectoring features

reduce the real-time overhead in handling interrupts.

The AIC also features a spurious vector, which reduces spurious interrupt handling to a mini-

mum, and a protect mode that facilitates the debug capabilities.

PIO: Parallel I/O

Controller

The AT91R40008 microcontroller has 32 programmable I/O lines. Six pins are dedicated as

general-purpose I/O pins. Other I/O lines are multiplexed with an external signal of a periph-

eral to optimize the use of available package pins. The PIO controller enables generation of an

interrupt on input change on any of the PIO pins.

WD: Watchdog The Watchdog is built around a 16-bit counter and is used to prevent system lock-up if the soft-

ware becomes trapped in a deadlock. It can generate an internal reset or interrupt, or assert

an active level on the dedicated pin NWDOVF. All programming registers are password-pro-

tected to prevent unintentional programming.

SF: Special Function The AT91R40008 microcontroller provides registers that implement the following special

functions:

•Chip identification

•RESET status

•Protect mode

AT91R40008

1732CS–ATARM–02/02

User Peripherals

USART: Universal

Synchronous/

Asynchronous

Receiver Transmitter

The AT91R40008 microcontroller provides two identical, full-duplex, universal synchro-

nous/asynchronous receiver/transmitters.

Each USART has its own baud rate generator and two dedicated Peripheral Data Controller

channels. The data format includes a start bit, up to 8 data bits, an optional programmable par-

ity bit and up to 2 stop bits.

The USART also features a Receiver Time-out Register, facilitating variable length frame sup-

port when it is working with the PDC, and a Time-guard Register, used when interfacing with

slow remote equipment.

TC: Timer/Counter The AT91R40008 microcontroller features a Timer/Counter block that includes three identical

16-bit Timer/Counter channels. It is possible to independently program each channel to per-

form a wide range of functions, including frequency measurement, event counting, interval

measurement, pulse generation, delay timing and pulse width modulation.

The Timer/Counter can be used in Capture or Waveform mode, and all three counter channels

can be started simultaneously and chained together.

14 AT91R40008

1732CS–ATARM–02/02

Ordering Information

Table 4. Ordering Information

Ordering Code Package Operation Range

AT91R40008-66AI TQFP 100 Industrial

(-40°Cto85°C)

AT91R40008

1732CS–ATARM–02/02

Packaging Information

Figure 3. 100-lead Thin Quad Flat Pack Package Outline

PIN 1

aaa

bbb

ddd





R1 R2 0.25



ccc



16 AT91R40008

1732CS–ATARM–02/02

Table 5. Common Dimensions (mm)

Symbol Min Nom Max

c 0.09 0.2

c1 0.09 0.16

L 0.45 0.6 0.75

L1 1.00 REF

R2 0.08 0.2

R1 0.08

S0.2

q0°3.5°7°

θ10°

θ211°12°13°

θ311°12°13°

A1.6

A1 0.05 0.15

A2 1.35 1.4 1.45

Tolerances of Form and Position

aaa 0.2

bbb 0.2

Table 6. Lead Count Dimensions (mm)

Count

D/E

BSC

D1/E1

BSC

bb1

BSC ccc dddMin Nom Max Min Nom Max

100 16.0 14.0 0.17 0.22 0.27 0.17 0.2 0.23 0.50 0.10 0.06

Table 7. Device and 100-lead TQFP Package Maximum Weight

710 mg

AT91R40008

1732CS–ATARM–02/02

Soldering

Profile

Table 8 gives the recommended soldering profile from J-STD-20.

Small packages may be subject to higher temperatures if they are reflowed in boards with

larger components. In this case, small packages may have to withstand temperatures of up to

235°C, not 220°C(IRreflow).

Recommended package reflow conditions depend on package thickness and volume. See

Table 9.

When certain small thin packages are used on boards without larger packages, these small

packages may be classified at 220°C instead of 235°C.

Notes: 1. The packages are qualified by Atmel by using IR reflow conditions, not convection or VPR.

2. By default, the package level 1 is qualified at 220°C (unless 235°C is stipulated).

3. The body temperature is the most important parameter but other profile parameters such as

total exposure time to hot temperature or heating rate may also influence component

reliability.

A maximum of three reflow passes is allowed per component.

Table 8. Soldering Profile

Convection or

IR/Convection VPR

Average Ramp-up Rate (183°C to Peak) 3°C/sec. max. 10°C/sec.

Preheat Temperature 125°C±25°C 120 sec. max

Temperature Maintained Above 183°C 60sec.to150sec.

Time within 5°C of Actual Peak Temperature 10 sec. to 20 sec. 60 sec.

Peak Temperature Range 220 +5/-0°Cor

235 +5/-0°C

215 to 219°Cor

235 +5/-0°C

Ramp-down Rate 6°C/sec. 10°C/sec.

Time 25°C to Peak Temperature 6 min. max

Table 9. Recommended Package Reflow Conditions (1,2,3)

Parameter Temperature

Convection 235 +5/-0°C

VPR 235 +5/-0°C

IR/Convection 235 +5/-0°C

18 AT91R40008

1732CS–ATARM–02/02

Document Details

Title AT91R40008 Summary

Literature Number 1732S

Revision History

Version A Publication Date: Jun-01

Version B Publication Date: Jul-01

Version C Publication Date: 21-Jan-02

Revisions Since Previous Version

Page: 9

Added information to section Internal Memories

Page: 14

Change in Table 4

Page: 16

Added Table 6, Package Weight

Page: 17

Added section Soldering Profile

Printed on recycled paper.

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