A29400V - AMIC Technology, Corp.

A29400 Series

512K X 8 Bit / 256K X 16 Bit CMOS 5.0 Volt-only,

Preliminary Boot Sector Flash Memory

PRELIMINARY (December, 2002, Version 0.2) 1 AMIC Technology, Corp.

Features

n 5.0V ± 10% for read and write operations

n Access times:

- 55/70/90 (max.)

n Current:

- 20 mA typical active read current

- 30 mA typical program/erase current

- 1 µA typical CMOS standby

n Flexible sector architecture

- 16 Kbyte/ 8 KbyteX2/ 32 Kbyte/ 64 KbyteX7 sectors

- 8 Kword/ 4 KwordX2/ 16 Kword/ 32 KwordX7 sectors

- Any combination of sectors can be erased

- Supports full chip erase

- Sector protection:

A hardware method of protecting sectors to prevent

any inadvertent program or erase operations within

that sector

n Top or bottom boot block configurations available

n Embedded Erase Algorithms

- Embedded Erase algorithm will automatically erase

the entire chip or any combination of designated

sectors and verify the erased sectors

- Embedded Program algorithm automatically writes

and verifies bytes at specified addresses

n Typical 100,000 program/erase cycles per sector

n 20-year data retention at 125°C

- Reliable operation for the life of the system

n Compatible with JEDEC-standards

- Pinout and software compatible with single-power-

supply Flash memory standard

- Superior inadvertent write protection

Data Polling and toggle bits

- Provides a software method of detecting completion

of program or erase operations

n Erase Suspend/Erase Resume

- Suspends a sector erase operation to read data from,

or program data to, a non-erasing sector, then

resumes the erase operation

n Hardware reset pin (RESET )

- Hardware method to reset the device to reading array

data

n Package options

- 44-pin SOP or 48-pin TSOP (I)

General Description

The A29400 is a 5.0 volt only Flash memory organized as

524,288 bytes of 8 bits or 262,144 words of 16 bits each. The

A29400 offers the RESET function. The 512 Kbytes of data are

further divided into eleven sectors for flexible sector erase

capability. The 8 bits of data appear on I/O0 - I/O7 while the

addresses are input on A1 to A17; the 16 bits of data appear on

I/O0~I/O15. The A29400 is offered in 44-pin SOP and 48-Pin

TSOP packages. This device is designed to be programmed in-

system with the standard system 5.0 volt VCC supply. Additional

12.0 volt VPP is not required for in-system write or erase

operations. However, the A29400 can also be programmed in

standard EPROM programmers.

The A29400 has the first toggle bit, I/O6, which indicates whether

an Embedded Program or Erase is in progress, or it is in the

Erase Suspend. Besides the I/O6 toggle bit, the A29400 has a

second toggle bit, I/O2, to indicate whether the addressed sector

is being selected for erase. The A29400 also offers the ability to

program in the Erase Suspend mode. The standard A29400

offers access times of 55, 70 and 90 ns, allowing high-speed

microprocessors to operate without wait states. To eliminate bus

contention the device has separate chip enable (CE ), write

enable (

) and output enable (OE ) controls.

The device requires only a single 5.0 volt power supply for both

read and write functions. Internally generated and regulated

voltages are provided for the program and erase operations.

The A29400 is entirely software command set compatible with

the JEDEC single-power-supply Flash standard. Commands are

written to the command register using standard microprocessor

write timings. Register contents serve as input to an internal

state-machine that controls the erase and programming circuitry.

Write cycles also internally latch addresses and data needed for

the programming and erase operations. Reading data out of the

device is similar to reading from other Flash or EPROM devices.

Device programming occurs by writing the proper program

command sequence. This initiates the Embedded Program

algorithm - an internal algorithm that automatically times the

program pulse widths and verifies proper program margin.

Device erasure occurs by executing the proper erase command

sequence. This initiates the Embedded Erase algorithm - an

internal algorithm that automatically preprograms the array (if it

is not already programmed) before executing the erase

operation. During erase, the device automatically times the

erase pulse widths and verifies proper erase margin.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 2 AMIC Technology, Corp.

The host system can detect whether a program or erase

operation is complete by reading the I/O7 ( Data Polling) and

I/O6 (toggle) status bits. After a program or erase cycle has

been completed, the device is ready to read array data or

accept another command.

The sector erase architecture allows memory sectors to be

erased and reprogrammed without affecting the data

contents of other sectors. The A29400 is fully erased when

shipped from the factory.

The hardware sector protection feature disables operations

for both program and erase in any combination of the

Pin Configurations

sectors of memory. This can be achieved via programming

equipment.

The Erase Suspend feature enables the user to put erase on

hold for any period of time to read data from, or program data

to, any other sector that is not selected for erasure. True

background erase can thus be achieved.

Power consumption is greatly reduced when the device is

placed in the standby mode.

The hardware RESET pin terminates any operation in

progress and resets the internal state machine to reading

array data.

n SOP n TSOP (I)

RY/BY

A17

VSS

I/O0

I/O14I/O8

I/O7

I/O15 (A-1)

VSS

BYTE

A16

A15

A14

A12

A11

A10

A13

A29400

16 29

NC RESET

I/O1

I/O9

I/O2

I/O10

I/O3

I/O11

I/O6

I/O13

I/O5

I/O12

I/O4

VCC

A29400V

A14

A13

A12

A11

A10

RESET

RY/BY

33 I/O2

I/O10

I/O3

I/O11

VCC

I/O4

I/O12

I/O5

I/O13

I/O6

I/O14

I/O7

I/O15 (A-1)

VSS

BYTE

A16A15

24 25

32 I/O9

I/O1

I/O8

I/O0

VSS

A17

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 3 AMIC Technology, Corp.

Block Diagram

Pin Descriptions

Pin No. Description

A0 - A17 Address Inputs

I/O0 - I/O14 Data Inputs/Outputs

I/O15 Data Input/Output, Word Mode

I/O15 (A-1) A-1 LSB Address Input, Byte Mode

CE Chip Enable

Write Enable

OE Output Enable

RESET Hardware Reset (N/A A294001)

BYTE

Selects Byte Mode or Word Mode

RY/

Ready/BUSY- Output

VSS Ground

VCC Power Supply

State

Control

Command

Address Latch

X-decoder

Y-Decoder

Chip Enable

Output Enable

Logic

Cell Matrix

Y-Gating

VCC Detector

PGM Voltage

Generator

Data Latch

Input/Output

Buffers

Erase Voltage

Generator

VCC

VSS

A0-A17

I/O0 - I/O15 (A-1)

Timer

STB

RESET

Sector Switches

BYTE

RY/BY

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 4 AMIC Technology, Corp.

Absolute Maximum Ratings*

Ambient Operating Temperature . . . . . -55°C to + 125°C

Storage Temperature . . . . . . . . . . . . . . -65°C to + 125°C

Ground to VCC . . . . . . . . . . . . . . . . . . . . . . -2.0V to 7.0V

Output Voltage (Note 1) . . . . . . . . . . . . . . . -2.0V to 7.0V

A9, OE & RESET (Note 2) . . . . . . . . . . . -2.0V to 12.5V

All other pins (Note 1) . . . . . . . . . . . . . . . . . -2.0V to 7.0V

Output Short Circuit Current (Note 3) . . . . . . . . . . 200mA

Notes:

1. Minimum DC voltage on input or I/O pins is -0.5V.

During voltage transitions, inputs may undershoot VSS

to -2.0V for periods of up to 20ns. Maximum DC voltage

on output and I/O pins is VCC +0.5V. During voltage

transitions, outputs may overshoot to VCC +2.0V for

periods up to 20ns.

2. Minimum DC input voltage on A9 pins is -0.5V. During

voltage transitions, A9,OE and RESET may overshoot

VSS to -2.0V for periods of up to 20ns. Maximum DC

input voltage on A9 and OE is +12.5V which may

overshoot to 13.5V for periods up to 20ns.

3. No more than one output is shorted at a time. Duration

of the short circuit should not be greater than one

second.

*Comments

Stresses above those listed under "Absolute Maximum

Ratings" may cause permanent damage to this device.

These are stress ratings only. Functional operation of

this device at these or any other conditions above

those indicated in the operational sections of these

specification is not implied or intended. Exposure to

the absolute maximum rating conditions for extended

periods may affect device reliability.

Operating Ranges

Commercial (C) Devices

Ambient Temperature (TA) . . . . . . . . . . . . . . 0°C to +70°C

VCC Supply Voltages

VCC for ± 10% devices . . . . . . . . . . . . . . +4.5V to +5.5V

Operating ranges define those limits between which the

functionally of the device is guaranteed.

Device Bus Operations

This section describes the requirements and use of the

device bus operations, which are initiated through the

internal command register. The command register itself

does not occupy any addressable memory location. The

along with the address and data information needed to

execute the command. The contents of the register serve

as inputs to the internal state machine. The state machine

outputs dictate the function of the device. The appropriate

device bus operations table lists the inputs and control

levels required, and the resulting output. The following

subsections describe each of these operations in further

detail.

Table 1. A29400 Device Bus Operations

I/O8 - I/O15 Operation

RESET A0 - A17 I/O0 - I/O7

BYTE

=VIH

BYTE

=VIL

Read L L H H AIN DOUT DOUT High-Z

Write L H L H AIN DIN DIN High-Z

CMOS Standby VCC ± 0.5 V

X X VCC ± 0.5 V X High-Z High-Z High-Z

TTL Standby H X X H X High-Z High-Z High-Z

Output Disable L H H H X High-Z High-Z High-Z

Hardware Reset X X X L X High-Z High-Z High-Z

Temporary Sector

Unprotect (See Note) X X X VID AIN DIN DIN X

Legend:

L = Logic Low = VIL, H = Logic High = VIH, VID = 12.0 ± 0.5V, X = Don't Care, DIN = Data In, DOUT = Data Out, AIN = Address In

Note:

See the "Sector Protection/Unprotection" section and Temporary Sector Unprotect for more information.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 5 AMIC Technology, Corp.

Word/Byte Configuration

The

BYTE

pin determines whether the I/O pins I/O15-I/O0

operate in the byte or word configuration. If the

BYTE

is set at logic ”1”, the device is in word configuration, I/O15-

I/O0 are active and controlled by CE and OE.

If the

BYTE

pin is set at logic “0”, the device is in byte

configuration, and only I/O0-I/O7 are active and controlled

by CE and OE . I/O8-I/O14 are tri-stated, and I/O15 pin is

used as an input for the LSB(A-1) address function.

Requirements for Reading Array Data

To read array data from the outputs, the system must drive

the CEand OE pins to VIL. CE is the power control and

selects the device. OE is the output control and gates

array data to the output pins.

should remain at VIH all

the time during read operation. The internal state machine

is set for reading array data upon device power-up, or after

a hardware reset. This ensures that no spurious alteration

of the memory content occurs during the power transition.

No command is necessary in this mode to obtain array

data. Standard microprocessor read cycles that assert valid

addresses on the device address inputs produce valid data

on the device data outputs. The device remains enabled for

read access until the command register contents are

altered.

See "Reading Array Data" for more information. Refer to the

AC Read Operations table for timing specifications and to

the Read Operations Timings diagram for the timing

waveforms, lCC1 in the DC Characteristics table represents

the active current specification for reading array data.

Writing Commands/Command Sequences

To write a command or command sequence (which

includes programming data to the device and erasing

sectors of memory), the system must drive

and CE to

VIL, and OE to VIH. An erase operation can erase one

sector, multiple sectors, or the entire device. The Sector

Address Tables indicate the address range that each sector

occupies. A "sector address" consists of the address inputs

required to uniquely select a sector. See the "Command

Definitions" section for details on erasing a sector or the

entire chip, or suspending/resuming the erase operation.

After the system writes the autoselect command sequence,

the device enters the autoselect mode. The system can

then read autoselect codes from the internal register (which

is separate from the memory array) on I/O7 - I/O0. Standard

read cycle timings apply in this mode. Refer to the

"Autoselect Mode" and "Autoselect Command Sequence"

sections for more information.

ICC2 in the DC Characteristics table represents the active

current specification for the write mode. The "AC

Characteristics" section contains timing specification tables

and timing diagrams for write operations.

Program and Erase Operation Status

During an erase or program operation, the system may

check the status of the operation by reading the status bits

on I/O7 - I/O0. Standard read cycle timings and ICC read

specifications apply. Refer to "Write Operation Status" for

more information, and to each AC Characteristics section

for timing diagrams.

Standby Mode

When the system is not reading or writing to the device, it

can place the device in the standby mode. In this mode,

current consumption is greatly reduced, and the outputs are

placed in the high impedance state, independent of the OE

input.

The device enters the CMOS standby mode when the CE

& RESET pins are both held at VCC ± 0.5V. (Note that this

is a more restricted voltage range than VIH.) The device

enters the TTL standby mode when CE is held at VIH, while

RESET is held at VCC±0.5V. The device requires the

standard access time (tCE) before it is ready to read data.

If the device is deselected during erasure or programming,

the device draws active current until the operation is

completed.

ICC3 in the DC Characteristics tables represents the standby

current specification.

Output Disable Mode

When the OE input is at VIH, output from the device is

disabled. The output pins are placed in the high impedance

state.

RESET : Hardware Reset Pin

The RESET pin provides a hardware method of resetting

the device to reading array data. When the system drives

the RESET pin low for at least a period of tRP, the device

immediately terminates any operation in progress, tristates

all data output pins, and ignores all read/write attempts for

the duration of the RESET pulse. The device also resets

the internal state machine to reading array data. The

operation that was interrupted should be reinitiated once

the device is ready to accept another command sequence,

to ensure data integrity.

The RESET pin may be tied to the system reset circuitry. A

system reset would thus also reset the Flash memory,

enabling the system to read the boot-up firmware from the

Flash memory.

Refer to the AC Characteristics tables for RESET

parameters and diagram.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 6 AMIC Technology, Corp.

Table 2. A29400 Top Boot Block Sector Address Table

Address Range (in hexadecimal)

Sector A17 A16 A15 A14 A13 A12 Sector Size

(Kbytes/Kwords)

(x8)

Address Range (x16)

Address Range

SA0 0 0 0 X X X 64/32 00000h - 0FFFFh 00000h - 07FFFh

SA1 0 0 1 X X X 64/32 10000h - 1FFFFh 08000h - 0FFFFh

SA2 0 1 0 X X X 64/32 20000h - 2FFFFh 10000h - 17FFFh

SA3 0 1 1 X X X 64/32 30000h - 3FFFFh 18000h - 1FFFFh

SA4 1 0 0 X X X 64/32 40000h - 4FFFFh 20000h - 27FFFh

SA5 1 0 1 X X X 64/32 50000h - 5FFFFh 28000h - 2FFFFh

SA6 1 1 0 X X X 64/32 60000h - 6FFFFh 30000h - 37FFFh

SA7 1 1 1 0 X X 32/16 70000h - 77FFFh 38000h - 3BFFFh

SA8 1 1 1 1 0 0 8/4 78000h - 79FFFh 3C000h - 3CFFFh

SA9 1 1 1 1 0 1 8/4 7A000h - 7BFFFh

3D000h - 3DFFFh

SA10 1 1 1 1 1 X 16/8 7C000h - 7FFFFh

3E000h - 3FFFFh

Table 3. A29400 Bottom Boot Block Sector Address Table

Address Range Sector A17 A16 A15 A14 A13 A12 Sector Size

(Kbytes) (x8)

Address Range (x16)

Address Range

SA0 0 0 0 0 0 X 16/8 00000h - 03FFFh 00000h - 01FFFh

SA1 0 0 0 0 1 0 8/4 04000h - 05FFFh 02000h - 02FFFh

SA2 0 0 0 0 1 1 8/4 06000h - 07FFFh 03000h - 03FFFh

SA3 0 0 0 1 X X 32/16 08000h - 0FFFFh 04000h - 07FFFh

SA4 0 0 1 X X X 64/32 10000h - 1FFFFh 08000h - 0FFFFh

SA5 0 1 0 X X X 64/32 20000h - 2FFFFh 10000h - 17FFFh

SA6 0 1 1 X X X 64/32 30000h - 3FFFFh 18000h - 1FFFFh

SA7 1 0 0 X X X 64/32 40000h - 4FFFFh 20000h - 27FFFh

SA8 1 0 1 X X X 64/32 50000h - 5FFFFh 28000h - 2FFFFh

SA9 1 1 0 X X X 64/32 60000h - 6FFFFh 30000h - 37FFFh

SA10 1 1 1 X X X 64/32 70000h - 7FFFFh 38000h - 3FFFFh

Autoselect Mode

The autoselect mode provides manufacturer and device

identification, and sector protection verification, through

identifier codes output on I/O7 - I/O0. This mode is primarily

intended for programming equipment to automatically

match a device to be programmed with its corresponding

programming algorithm. However, the autoselect codes

can also be accessed in-system through the command

When using programming equipment, the autoselect mode

requires VID (11.5V to 12.5 V) on address pinA9. Address

pins A6, A1, and A0 must be as shown in Autoselect

Codes (High Voltage Method) table. In addition, when

verifying sector protection, the sector address must appear

on the appropriate highest order address bits. Refer to the

corresponding Sector Address Tables. The Command

Definitions table shows the remaining address bits that are

don't care. When all necessary bits have been set as

required, the programming equipment may then read the

corresponding identifier code on I/O7 - I/O0.To access the

autoselect codes in-system, the host system can issue the

autoselect command via the command register, as shown

in the Command Definitions table. This method does not

require VID. See "Command Definitions" for details on

using the autoselect mode.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 7 AMIC Technology, Corp.

Table 4. A29400 Autoselect Codes (High Voltage Method)

Description Mode A17

A12

A11

A10

A9 A8

A6 A5

A1 A0 I/O8

I/O15

I/O7

I/O0

Manufacturer ID: AMIC X X VID X L X L L X 37h

Word B3h B0h Device ID: A29400

(Top Boot Block) Byte X X VID X L X L H X B0h

Word B3h 31h Device ID: A29400

(Bottom Boot Block) Byte X X VID X L X L H X 31h

Continuation ID X X VID X L X H H X 7Fh

X 01h

(protected)

Sector Protection Verification SA X VID X L X H L X 00h

(unprotected)

L=Logic Low= VIL, H=Logic High=VIH, SA=Sector Address, X=Don’t Care.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 8 AMIC Technology, Corp.

Sector Protection/Unprotection

The hardware sector protection feature disables both program

and erase operations in any sector. The hardware sector

unprotection feature re-enables both program and erase

operations in previously protected sectors.

Sector protection/unprotection must be implemented using

programming equipment. The procedure requires a high

voltage (VID) on address pin A9 and the control pins.

The device is shipped with all sectors unprotected.

It is possible to determine whether a sector is protected or

unprotected. See "Autoselect Mode" for details.

Hardware Data Protection

The requirement of command unlocking sequence for

programming or erasing provides data protection against

inadvertent writes (refer to the Command Definitions table). In

addition, the following hardware data protection measures

prevent accidental erasure or programming, which might

otherwise be caused by spurious system level signals during

VCC power-up transitions, or from system noise. The device is

powered up to read array data to avoid accidentally writing

data to the array.

Write Pulse "Glitch" Protection

Noise pulses of less than 5ns (typical) on OE, CE or

do not initiate a write cycle.

Logical Inhibit

Write cycles are inhibited by holding any one of OE =VIL, CE

= VIH or

= VIH. To initiate a write cycle, CE and

must be a logical zero while OE is a logical one.

Power-Up Write Inhibit

= CE = VIL and OE = VIH during power up, the

device does not accept commands on the rising edge of

. The internal state machine is automatically reset to

reading array data on the initial power-up.

Temporary Sector Unprotect

This feature allows temporary unprotection of previous

protected sectors to change data in-system. The Sector

Unprotect mode is activated by setting the RESET pin to VID.

During this mode, formerly protected sectors can be

programmed or erased by selecting the sector addresses.

Once VID is removed from the RESET pin, all the previously

protected sectors are protected again. Figure 1 shows the

algorithm, and the Temporary Sector Unprotect diagram

shows the timing waveforms, for this feature.

START

RESET = VID

(Note 1)

Perform Erase or

Program Operations

RESET = VIH

Temporary Sector

Unprotect

Completed (Note 2)

Notes:

1. All protected sectors unprotected.

2. All previously protected sectors are protected once again.

Figure 1. Temporary Sector Unprotect Operation

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 9 AMIC Technology, Corp.

Command Definitions

Writing specific address and data commands or sequences

into the command register initiates device operations. The

Command Definitions table defines the valid register

command sequences. Writing incorrect address and data

values or writing them in the improper sequence resets the

device to reading array data.

All addresses are latched on the falling edge of

or CE,

whichever happens later. All data is latched on the rising

edge of

or CE , whichever happens first. Refer to the

appropriate timing diagrams in the "AC Characteristics"

section.

Reading Array Data

The device is automatically set to reading array data after

device power-up. No commands are required to retrieve data.

The device is also ready to read array data after completing

an Embedded Program or Embedded Erase algorithm. After

the device accepts an Erase Suspend command, the device

enters the Erase Suspend mode. The system can read array

data using the standard read timings, except that if it reads at

an address within erase-suspended sectors, the device

outputs status data. After completing a programming

operation in the Erase Suspend mode, the system may once

again read array data with the same exception. See "Erase

Suspend/Erase Resume Commands" for more information on

this mode.

The system must issue the reset command to re-enable the

device for reading array data if I/O5 goes high, or while in the

autoselect mode. See the "Reset Command" section, next.

See also "Requirements for Reading Array Data" in the

"Device Bus Operations" section for more information. The

Read Operations table provides the read parameters, and

Read Operation Timings diagram shows the timing diagram.

Reset Command

Writing the reset command to the device resets the device to

reading array data. Address bits are don't care for this

command. The reset command may be written between the

sequence cycles in an erase command sequence before

erasing begins. This resets the device to reading array data.

Once erasure begins, however, the device ignores reset

commands until the operation is complete.

The reset command may be written between the sequence

cycles in a program command sequence before programming

begins. This resets the device to reading array data (also

applies to programming in Erase Suspend mode). Once

programming begins, however, the device ignores reset

commands until the operation is complete.

The reset command may be written between the sequence

cycles in an autoselect command sequence. Once in the

autoselect mode, the reset command must be written to

return to reading array data (also applies to autoselect during

Erase Suspend).

If I/O5 goes high during a program or erase operation, writing

the reset command returns the device to reading array data

(also applies during Erase Suspend).

Autoselect Command Sequence

The autoselect command sequence allows the host system to

access the manufacturer and devices codes, and determine

whether or not a sector is protected. The Command

Definitions table shows the address and data requirements.

This method is an alternative to that shown in the Autoselect

Codes (High Voltage Method) table, which is intended for

PROM programmers and requires VID on address bit A9.

The autoselect command sequence is initiated by writing two

unlock cycles, followed by the autoselect command. The

device then enters the autoselect mode, and the system may

read at any address any number of times, without initiating

another command sequence.

A read cycle at address XX00h retrieves the manufacturer

code and another read cycle at XX03h retrieves the

continuation code. A read cycle at address XX01h returns the

device code. A read cycle containing a sector address (SA)

and the address 02h in returns 01h if that sector is protected,

or 00h if it is unprotected. Refer to the Sector Address tables

for valid sector addresses.

The system must write the reset command to exit the

autoselect mode and return to reading array data.

Word/Byte Program Command Sequence

The system may program the device by word or byte,

depending on the state of the

BYTE

pin. Programming is a

four-bus-cycle operation. The program command sequence is

initiated by writing two unlock write cycles, followed by the

program set-up command. The program address and data

are written next, which in turn initiate the Embedded Program

algorithm. The system is not required to provide further

controls or timings. The device automatically provides

internally generated program pulses and verify the

programmed cell margin. Table 5 shows the address and

data requirements for the byte program command sequence.

When the Embedded Program algorithm is complete, the

device then returns to reading array data and addresses are

longer latched. The system can determine the status of the

program operation by using I/O7, I/O6, or RY/

. See “White

Operation Status” for information on these status bits.

Any commands written to the device during the Embedded

Program Algorithm are ignored. Not that a hardware reset

immediately terminates the programming operation. The Byte

Program command sequence should be reinitiated once the

device has reset to reading array data, to ensure data

integrity.

Programming is allowed in any sequence and across sector

boundaries. A bit cannot be programmed from a “0” back to a

“1”. Attempting to do so may halt the operation and set I/O5 to

“1”, or cause the Data Polling algorithm to indicate the

operation was successful. However, a succeeding read will

show that the data is still “0”. Only erase operations can

convert a “0” to a “1”.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 10 AMIC Technology, Corp.

START

Write Program

Command

Sequence

Data Poll

from System

Verify Data ?

Last Address ?

Programming

Completed

Yes

Increment Address

Embedded

Program

algorithm in

progress

Note : See the appropriate Command Definitions table for

program command sequence.

Figure 2. Program Operation

Chip Erase Command Sequence

Chip erase is a six-bus-cycle operation. The chip erase

command sequence is initiated by writing two unlock cycles,

followed by a set-up command. Two additional unlock write

cycles are then followed by the chip erase command, which in

turn invokes the Embedded Erase algorithm. The device does

not require the system to preprogram prior to erase. The

Embedded Erase algorithm automatically preprograms and

verifies the entire memory for an all zero data pattern prior to

electrical erase. The system is not required to provide any

controls or timings during these operations. The Command

Definitions table shows the address and data requirements

for the chip erase command sequence.

Any commands written to the chip during the Embedded

Erase algorithm are ignored. The system can determine the

status of the erase operation by using I/O7, I/O6, or I/O2. See

"Write Operation Status" for information on these status bits.

When the Embedded Erase algorithm is complete, the device

returns to reading array data and addresses are no longer

latched.

Figure 3 illustrates the algorithm for the erase operation. See

the Erase/Program Operations tables in "AC Characteristics"

for parameters, and to the Chip/Sector Erase Operation

Timings for timing waveforms.

Sector Erase Command Sequence

Sector erase is a six-bus-cycle operation. The sector erase

command sequence is initiated by writing two unlock cycles,

followed by a set-up command. Two additional unlock write

cycles are then followed by the address of the sector to be

erased, and the sector erase command. The Command

Definitions table shows the address and data requirements

for the sector erase command sequence.

The device does not require the system to preprogram the

memory prior to erase. The Embedded Erase algorithm

automatically programs and verifies the sector for an all zero

data pattern prior to electrical erase. The system is not

required to provide any controls or timings during these

operations.

After the command sequence is written, a sector erase time-

out of 50µs begins. During the time-out period, additional

sector addresses and sector erase commands may be

written. Loading the sector erase buffer may be done in any

sequence, and the number of sectors may be from one sector

to all sectors. The time between these additional cycles must

be less than 50µs, otherwise the last address and command

might not be accepted, and erasure may begin. It is

recommended that processor interrupts be disabled during

this time to ensure all commands are accepted. The interrupts

can be re-enabled after the last Sector Erase command is

written. If the time between additional sector erase

commands can be assumed to be less than 50µs, the system

need not monitor I/O3. Any command other than Sector Erase

or Erase Suspend during the time-out period resets the

device to reading array data. The system must rewrite the

command sequence and any additional sector addresses and

commands.

The system can monitor I/O3 to determine if the sector erase

timer has timed out. (See the " I/O3: Sector Erase Timer"

section.) The time-out begins from the rising edge of the final

pulse in the command sequence.

Once the sector erase operation has begun, only the Erase

Suspend command is valid. All other commands are ignored.

When the Embedded Erase algorithm is complete, the device

returns to reading array data and addresses are no longer

latched. The system can determine the status of the erase

operation by using I/O7, I/O6, or I/O2. Refer to "Write

Operation Status" for information on these status bits.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 11 AMIC Technology, Corp.

START

Write Erase

Command

Sequence

Data Poll

from System

Data = FFh ?

Erasure Completed

Yes

Embedded

Erase

algorithm in

progress

Note :

1. See the appropriate Command Definitions table for erase

command sequences.

2. See "I/O3 : Sector Erase Timer" for more information.

Figure 3. Erase Operation

Figure 3 illustrates the algorithm for the erase operation.

Refer to the Erase/Program Operations tables in the "AC

Characteristics" section for parameters, and to the Sector

Erase Operations Timing diagram for timing waveforms.

Erase Suspend/Erase Resume Commands

The Erase Suspend command allows the system to interrupt

a sector erase operation and then read data from, or program

data to, any sector not selected for erasure. This command is

valid only during the sector erase operation, including the

50µs time-out period during the sector erase command

sequence. The Erase Suspend command is ignored if written

during the chip erase operation or Embedded Program

algorithm. Writing the Erase Suspend command during the

Sector Erase time-out immediately terminates the time-out

period and suspends the erase operation. Addresses are

"don't cares" when writing the Erase Suspend command.

When the Erase Suspend command is written during a sector

erase operation, the device requires a maximum of 20µs to

suspend the erase operation. However, when the Erase

Suspend command is written during the sector erase time-

out, the device immediately terminates the time-out period

and suspends the erase operation.

After the erase operation has been suspended, the system

can read array data from or program data to any sector not

selected for erasure. (The device "erase suspends" all

sectors selected for erasure.) Normal read and write timings

and command definitions apply. Reading at any address

within erase-suspended sectors produces status data on I/O7

- I/O0. The system can use I/O7, or I/O6 and I/O2 together, to

determine if a sector is actively erasing or is erase-

suspended. See "Write Operation Status" for information on

these status bits.

After an erase-suspended program operation is complete, the

system can once again read array data within non-suspended

sectors. The system can determine the status of the program

operation using the I/O7 or I/O6 status bits, just as in the

standard program operation. See "Write Operation Status" for

more information.

The system may also write the autoselect command

sequence when the device is in the Erase Suspend mode.

The device allows reading autoselect codes even at

addresses within erasing sectors, since the codes are not

stored in the memory array. When the device exits the

autoselect mode, the device reverts to the Erase Suspend

mode, and is ready for another valid operation. See

"Autoselect Command Sequence" for more information.

The system must write the Erase Resume command (address

bits are "don't care") to exit the erase suspend mode and

continue the sector erase operation. Further writes of the

Resume command are ignored. Another Erase Suspend

command can be written after the device has resumed

erasing.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 12 AMIC Technology, Corp.

Table 5. A29400 Command Definitions

Bus Cycles (Notes 2 - 5)

First Second Third Fourth Fifth Sixth

Command

Sequence

(Note 1)

Cycles

Addr Data Addr Data Addr Data

Addr

Data Addr

Data

Addr Data

Read (Note 6) 1 RA RD

Reset (Note 7) 1 XXX F0

Word 555 2AA 555

Manufacturer ID Byte 4 AAA AA 555 55 AAA 90 X00 37

Word 555 2AA 555 X01 B3B0

Device ID,

Top Boot Block Byte 4 AAA AA 555 55 AAA 90 X02

Word 555 2AA 555 X01

B331

Device ID,

Bottom Boot Block Byte 4 AAA AA 555 55 AAA

X02

Word 555 2AA 555 X03

Continuation ID Byte 4 AAA AA 555 55 AAA 90 X06 7F

XX00

Word 555 2AA 555 (SA)

X02 XX01

Autoselect (Note 8)

Sector Protect Verify

(Note 9) Byte 4 AAA AA 555 55 AAA 90 (SA)

X04 01

Word 555 2AA 555

Program Byte 4 AAA AA 555 55 AAA A0 PA PD

Word 555 2AA 555 555 2AA 555

Chip Erase Byte 6 AAA AA 555 55 AAA 80 AAA

AA 555 55 AAA 10

Word 555 2AA 555 555 2AA

Sector Erase Byte 6 AAA AA 555 55 AAA 80 AAA

AA 555 55 SA 30

Erase Suspend (Note 9) 1 XXX B0

Erase Resume (Note 10) 1 XXX 30

Legend:

X = Don't care

RA = Address of the memory location to be read.

RD = Data read from location RA during read operation.

PA = Address of the memory location to be programmed. Addresses latch on the falling edge of the

or CE pulse, whichever

happens later.

PD = Data to be programmed at location PA. Data latches on the rising edge of

or CE pulse, whichever happens first.

SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits A17 - A12 select a unique sector.

Note:

1. See Table 1 for description of bus operations.

2. All values are in hexadecimal.

3. Except when reading array or autoselect data, all bus cycles are write operation.

4. Address bits A17 - A11 are don't cares for unlock and command cycles, unless SA or PA required.

5. No unlock or command cycles required when reading array data.

6. The Reset command is required to return to reading array data when device is in the autoselect mode, or if I/O5 goes high

(while the device is providing status data).

7. The fourth cycle of the autoselect command sequence is a read cycle.

8. The data is 00h for an unprotected sector and 01h for a protected sector. See "Autoselect Command Sequence" for more information.

9. The system may read and program in non-erasing sectors, or enter the autoselect mode, when in the Erase Suspend mode.

10. The Erase Resume command is valid only during the Erase Suspend mode.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 13 AMIC Technology, Corp.

Write Operation Status

Several bits, I/O2, I/O3, I/O5, I/O6, I/O7, RY/

are provided

in the A29400 to determine the status of a write operation.

Table 6 and the following subsections describe the

functions of these status bits. I/O7, I/O6 and RY/

each

offer a method for determining whether a program or erase

operation is complete or in progress. These three bits are

discussed first.

I/O7: Data Polling

The Data Polling bit, I/O7, indicates to the host system

whether an Embedded Algorithm is in progress or

completed, or whether the device is in Erase Suspend.

Data Polling is valid after the rising edge of the final

pulse in the program or erase command sequence.

During the Embedded Program algorithm, the device

outputs on I/O7 the complement of the datum programmed

to I/O7. This I/O7 status also applies to programming during

Erase Suspend. When the Embedded Program algorithm

is complete, the device outputs the datum programmed to

I/O7. The system must provide the program address to

read valid status information on I/O7. If a program address

falls within a protected sector, Data Polling on I/O7 is

active for approximately 2µs, then the device returns to

reading array data.

During the Embedded Erase algorithm, Data Polling

produces a "0" on I/O7. When the Embedded Erase

algorithm is complete, or if the device enters the Erase

Suspend mode, Data Polling produces a "1" on I/O7.This

is analogous to the complement/true datum output

described for the Embedded Program algorithm: the erase

function changes all the bits in a sector to "1"; prior to this,

the device outputs the "complement," or "0." The system

must provide an address within any of the sectors selected

for erasure to read valid status information on I/O7.

After an erase command sequence is written, if all sectors

selected for erasing are protected, Data Polling on I/O7 is

active for approximately 100µs, then the device returns to

reading array data. If not all selected sectors are protected,

the Embedded Erase algorithm erases the unprotected

sectors, and ignores the selected sectors that are

protected.

When the system detects I/O7 has changed from the

complement to true data, it can read valid data at I/O7 - I/O0

on the following read cycles. This is because I/O7 may

change asynchronously with I/O0 - I/O6 while Output Enable

(OE) is asserted low. The Data Polling Timings (During

Embedded Algorithms) figure in the "AC Characteristics"

section illustrates this. Table 6 shows the outputs for Data

Polling on I/O7. Figure 4 shows the Data Polling algorithm.

START

Read I/O7-I/O0

Address = VA

I/O7 = Data ?

FAIL

Note :

1. VA = Valid address for programming. During a sector

erase operation, a valid address is an address within any

sector selected for erasure. During chip erase, a valid

address is any non-protected sector address.

2. I/O7 should be rechecked even if I/O5 = "1" because

I/O7 may change simultaneously with I/O5.

Read I/O7 - I/O0

Address = VA

I/O5 = 1?

I/O7 = Data ?

Yes

PASS

Yes

Figure 4. Data Polling Algorithm

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 14 AMIC Technology, Corp.

RY/

: Read/Busy

The RY/

is a dedicated, open-drain output pin that

indicates whether an Embedded algorithm is in progress or

complete. The RY/

status is valid after the rising edge

of the final

pulse in the command sequence. Since

RY/

is an open-drain output, several RY/

pins can

be tied together in parallel with a pull-up resistor to VCC.

If the output is low (Busy), the device is actively erasing or

programming. (This includes programming in the Erase

Suspend mode.) If the output is high (Ready), the device is

ready to read array data (including during the Erase

Suspend mode), or is in the standby mode.

Table 6 shows the outputs for RY/

. Refer to “RESET

Timings”, “Timing Waveforms for Program Operation” and

“Timing Waveforms for Chip/Sector Erase Operation” for

more information.

I/O6: Toggle Bit I

Toggle Bit I on I/O6 indicates whether an Embedded

Program or Erase algorithm is in progress or complete, or

whether the device has entered the Erase Suspend mode.

Toggle Bit I may be read at any address, and is valid after

the rising edge of the final

pulse in the command

sequence (prior to the program or erase operation), and

during the sector erase time-out.

During an Embedded Program or Erase algorithm

operation, successive read cycles to any address cause

I/O6 to toggle. (The system may use either OE or CE to

control the read cycles.) When the operation is complete,

I/O6 stops toggling.

After an erase command sequence is written, if all sectors

selected for erasing are protected, I/O6 toggles for

approximately 100µs, then returns to reading array data. If

not all selected sectors are protected, the Embedded

Erase algorithm erases the unprotected sectors, and

ignores the selected sectors that are protected.

The system can use I/O6 and I/O2 together to determine

whether a sector is actively erasing or is erase-suspended.

When the device is actively erasing (that is, the Embedded

Erase algorithm is in progress), I/O6 toggles. When the

device enters the Erase Suspend mode, I/O6 stops

toggling. However, the system must also use I/O2 to

determine which sectors are erasing or erase-suspended.

Alternatively, the system can use I/O7 (see the subsection

on " I/O7 : Data Polling").

If a program address falls within a protected sector, I/O6

toggles for approximately 2µs after the program command

sequence is written, then returns to reading array data.

I/O6 also toggles during the erase-suspend-program mode,

and stops toggling once the Embedded Program algorithm

is complete.

The Write Operation Status table shows the outputs for

Toggle Bit I on I/O6. Refer to Figure 5 for the toggle bit

algorithm, and to the Toggle Bit Timings figure in the "AC

Characteristics" section for the timing diagram. The I/O2 vs.

I/O6 figure shows the differences between I/O2 and I/O6 in

graphical form. See also the subsection on " I/O2: Toggle

Bit II".

I/O2: Toggle Bit II

The "Toggle Bit II" on I/O2, when used with I/O6, indicates

whether a particular sector is actively erasing (that is, the

Embedded Erase algorithm is in progress), or whether that

sector is erase-suspended. Toggle Bit II is valid after the

rising edge of the final

pulse in the command

sequence.

I/O2 toggles when the system reads at addresses within

those sectors that have been selected for erasure. (The

system may use either OE or CE to control the read

cycles.) But I/O2 cannot distinguish whether the sector is

actively erasing or is erase-suspended. I/O6, by

comparison, indicates whether the device is actively

erasing, or is in Erase Suspend, but cannot distinguish

which sectors are selected for erasure. Thus, both status

bits are required for sector and mode information. Refer to

Table 6 to compare outputs for I/O2 and I/O6.

Figure 5 shows the toggle bit algorithm in flowchart form,

and the section " I/O2: Toggle Bit II" explains the algorithm.

See also the " I/O6: Toggle Bit I" subsection. Refer to the

Toggle Bit Timings figure for the toggle bit timing diagram.

The I/O2 vs. I/O6 figure shows the differences between I/O2

and I/O6 in graphical form.

Reading Toggle Bits I/O6, I/O2

Refer to Figure 5 for the following discussion. Whenever

the system initially begins reading toggle bit status, it must

read I/O7 - I/O0 at least twice in a row to determine whether

a toggle bit is toggling. Typically, a system would note and

store the value of the toggle bit after the first read. After the

second read, the system would compare the new value of

the toggle bit with the first. If the toggle bit is not toggling,

the device has completed the program or erase operation.

The system can read array data on I/O7 - I/O0 on the

following read cycle.

However, if after the initial two read cycles, the system

determines that the toggle bit is still toggling, the system

also should note whether the value of I/O5 is high (see the

section on I/O5). If it is, the system should then determine

again whether the toggle bit is toggling, since the toggle bit

may have stopped toggling just as I/O5 went high. If the

toggle bit is no longer toggling, the device has successfully

completed the program or erase operation. If it is still

toggling, the device did not complete the operation

successfully, and the system must write the reset

command to return to reading array data.

The remaining scenario is that the system initially

determines that the toggle bit is toggling and I/O5 has not

gone high. The system may continue to monitor the toggle

bit and I/O5 through successive read cycles, determining

the status as described in the previous paragraph.

Alternatively, it may choose to perform other system tasks.

In this case, the system must start at the beginning of the

algorithm when it returns to determine the status of the

operation (top of Figure 5).

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 15 AMIC Technology, Corp.

I/O5: Exceeded Timing Limits

I/O5 indicates whether the program or erase time has

exceeded a specified internal pulse count limit. Under

these conditions I/O5 produces a "1." This is a failure

condition that indicates the program or erase cycle was not

successfully completed.

The I/O5 failure condition may appear if the system tries to

program a "1 "to a location that is previously programmed

to "0." Only an erase operation can change a "0" back to a

"1." Under this condition, the device halts the operation,

and when the operation has exceeded the timing limits,

I/O5 produces a "1."

Under both these conditions, the system must issue the

reset command to return the device to reading array data.

I/O3: Sector Erase Timer

After writing a sector erase command sequence, the

system may read I/O3 to determine whether or not an

erase operation has begun. (The sector erase timer does

not apply to the chip erase command.) If additional sectors

are selected for erasure, the entire time-out also applies

after each additional sector erase command. When the

time-out is complete, I/O3 switches from "0" to "1." The

system may ignore I/O3 if the system can guarantee that

the time between additional sector erase commands will

always be less than 50µs. See also the "Sector Erase

Command Sequence" section.

After the sector erase command sequence is written, the

system should read the status on I/O7 (Data Polling) or

I/O6 (Toggle Bit 1) to ensure the device has accepted the

command sequence, and then read I/O3. If I/O3 is "1", the

internally controlled erase cycle has begun; all further

commands (other than Erase Suspend) are ignored until

the erase operation is complete. If I/O3 is "0", the device

will accept additional sector erase commands. To ensure

the command has been accepted, the system software

should check the status of I/O3 prior to and following each

subsequent sector erase command. If I/O3 is high on the

second status check, the last command might not have

been accepted. Table 6 shows the outputs for I/O3.

START

Read I/O7-I/O0

Toggle Bit

= Toggle ?

Program/Erase

Operation Not

Commplete, Write

Reset Command

Yes

Notes :

1. Read toggle bit twice to determine whether or not it is

toggling. See text.

2. Recheck toggle bit because it may stop toggling as I/O5

changes to "1". See text.

Read I/O7 - I/O0

Twice

I/O5 = 1?

Toggle Bit

= Toggle ?

Yes

Program/Erase

Operation Complete

Read I/O7-I/O0

(Notes 1,2)

Figure 5. Toggle Bit Algorithm

(Note 1)

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 16 AMIC Technology, Corp.

Table 6. Write Operation Status

I/O7 I/O6 I/O5 I/O3 I/O2 RY/

Operation (Note 1) (Note 2) (Note 1)

Embedded Program Algorithm 7I/O Toggle 0 N/A No toggle 0

Standard

Mode Embedded Erase Algorithm 0 Toggle 0 1 Toggle 0

Reading within Erase

Suspended Sector 1 No toggle 0 N/A Toggle 1

Reading within Non-Erase

Suspend Sector Data Data Data Data Data 1

Erase

Suspend

Mode

Erase-Suspend-Program 7I/O Toggle 0 N/A N/A 0

Notes:

1. I/O7 and I/O2 require a valid address when reading status information. Refer to the appropriate subsection for further

details.

2. I/O5 switches to “1” when an Embedded Program or Embedded Erase operation has exceeded the maximum timing

limits. See “I/O5: Exceeded Timing Limits” for more information.

Maximum Negative Input Overshoot

20ns 20ns

20ns

+0.8V

-0.5V

-2.0V

Maximum Positive Input Overshoot

20ns20ns

20ns

VCC+0.5V

2.0V

VCC+2.0V

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 17 AMIC Technology, Corp.

DC Characteristics

TTL/NMOS Compatible

Parameter

Symbol Parameter Description Test Description Min. Typ. Max. Unit

ILI Input Load Current VIN = VSS to VCC. VCC = VCC Max ±1.0 µA

ILIT A9,OE&RESET Input Load Current VCC = VCC Max,

A9,OE & RESET=12.5V

100 µA

ILO Output Leakage Current VOUT = VSS to VCC. VCC = VCC Max ±1.0 µA

ICC1 VCC Active Read Current

(Notes 1, 2) CE = VIL, OE = VIH 20 30 mA

ICC2 VCC Active Write (Program/Erase)

Current (Notes 2, 3, 4) CE= VIL, OE =VIH 30 40 mA

ICC3 VCC Standby Current (Note 2) CE= VIH, RESET= VCC ± 0.5V 0.4 1.0 mA

VIL Input Low Level -0.5 0.8 V

VIH Input High Level 2.0 VCC+0.5

VID Voltage for Autoselect and

Temporary Unprotect Sector VCC = 5.25 V 10.5 12.5 V

VOL Output Low Voltage IOL = 12mA, VCC = VCC Min 0.45 V

VOH Output High Voltage IOH = -2.5 mA, VCC = VCC Min 2.4 V

CMOS Compatible

Parameter

Symbol Parameter Description Test Description Min. Typ. Max. Unit

ILI Input Load Current VIN = VSS to VCC, VCC = VCC Max ±1.0 µA

ILIT A9,OE& RESET Input Load Current VCC = VCC Max,

A9,OE & RESET= 12.5V

50 µA

ILO Output Leakage Current VOUT = VSS to VCC, VCC = VCC Max ±1.0 µA

ICC1 VCC Active Read Current

(Notes 1,2) CE = VIL, OE = VIH 20 30 mA

ICC2 VCC Active Program/Erase Current

(Notes 2,3,4) CE = VIL, OE = VIH 30 40 mA

ICC3 VCC Standby Current (Notes 2, 5) CE = RESET = VCC ± 0.5 V 1 5 µA

VIL Input Low Level -0.5 0.8 V

VIH Input High Level 0.7 x VCC VCC+0.3

VID Voltage for Autoselect and

Temporary Sector Unprotect VCC = 5.25 V 10.5 12.5 V

VOL Output Low Voltage IOL = 12.0 mA, VCC = VCC Min 0.45 V

VOH1 IOH = -2.5 mA, VCC = VCC Min 0.85 x VCC

VOH2 Output High Voltage IOH = -100 µA. VCC = VCC Min VCC-0.4 V

Notes for DC characteristics (both tables):

1. The ICC current listed includes both the DC operation current and the frequency dependent component (at 6 MHz).

The frequency component typically is less than 2 mA/MHz, withOE at VIH.

2. Maximum ICC specifications are tested with VCC = VCC max.

3. ICC active while Embedded Algorithm (program or erase) is in progress.

4. Not 100% tested.

5. For CMOS mode only, ICC3 = 20µA max at extended temperatures (> +85°C).

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 18 AMIC Technology, Corp.

AC Characteristics

Read Only Operations

Parameter Symbols Speed

JEDEC Std

Description Test Setup

-55 -70 -90

Unit

tAVAV tRC Read Cycle Time (Note 2) Min. 55 70 90 ns

tAVQV tACC Address to Output Delay CE = VIL

OE = VIL Max. 55 70 90 ns

tELQV tCE Chip Enable to Output Delay OE = VIL Max. 55 70 90 ns

tGLQV tOE Output Enable to Output Delay Max. 30 30 35 ns

Read Min. 0 0 0 ns

tOEH Output Enable Hold

Time (Note 2) Toggle and

Data Polling

Min. 10 10 10 ns

tEHQZ tDF Chip Enable to Output High Z

(Notes 1,2) Max. 18 20 20 ns

tGHQZ tDF Output Enable to Output High Z

(Notes 1,2) 18 20 20 ns

tAXQX tOH Output Hold Time from Addresses,

CEor OE , Whichever Occurs First Min. 0 0 0 ns

Notes:

1. Output driver disable time.

2. Not 100% tested.

Timing Waveforms for Read Only Operation (RESET=VIH on A29400)

Addresses Addresses Stable

Output Valid High-Z

Output

tRC

tOEH

tOE

tCE

High-Z

tOH

tDF

tACC

RESET

RY/BY

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 19 AMIC Technology, Corp.

AC Characteristics

Hardware Reset (RESET)

Parameter

JEDEC Std Description Test Setup All Speed Options Unit

tREADY RESET Pin Low (During Embedded

Algorithms) to Read or Write (See Note) Max 20 µs

tREADY RESET Pin Low (Not During Embedded

Algorithms) to Read or Write (See Note) Max 500 ns

tRP RESET Pulse Width Min 500 ns

tRH RESET High Time Before Read (See Note) Min 50 ns

tRB RY/

Recovery Time Min 0 ns

Note: Not 100% tested.

RESET Timings

CE, OE

RESET tRH

tRP

tReady

Reset Timings NOT during Embedded Algorithms

RESET

tRP

Reset Timings during Embedded Algorithms

RY/BY

tRB

tReady

CE, OE

RY/BY

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 20 AMIC Technology, Corp.

Temporary Sector Unprotect

Parameter

JEDEC Std Description All Speed Options Unit

tVIDR VID Rise and Fall Time (See Note) Min 500 ns

tRSP RESET Setup Time for Temporary Sector

Unprotect Min 4 µs

Note: Not 100% tested.

Temporary Sector Unprotect Timing Diagram

Program or Erase Command Sequence

RESET

12V

0 or 5V

tVIDR tVIDR

0 or 5V

tRSP

RY/BY

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 21 AMIC Technology, Corp.

AC Characteristics

Word/Byte Configuration (

BYTE

)

Parameter All Speed Options

JEDEC Std

Description

-55 -70 -90

Unit

tELFL/tELFH CE to

BYTE

Switching Low or High Max 5 ns

tFLQZ

BYTE

Switching Low to Output High-Z Max 15 20 20 ns

tHQV

BYTE

Switching High to Output Active Min 55 70 90 ns

BYTE

Timings for Read Operations

BYTE

Timings for Write Operations

Note:

Refer to the Erase/Program Operations table for tAS and tAH specifications.

Data Output

(I/O0-I/O14)Data Output

(I/O0-I/O7)

I/O15

Output Address Input

Data Output

(I/O0-I/O14)

Data Output

(I/O0-I/O7)

I/O15

Output

Address Input

tFHQV

tFLQZ

tELFH

tELFL

BYTE

I/O0-I/O14

I/O15 (A-1)

BYTE

I/O0-I/O14

I/O15 (A-1)

BYTE

Switching

from word to

byte mode

BYTE

Switching

from byte to

word mode

The falling edge of the last WE signal

tHOLD(tAH)

tSET

(tAS)

BYTE

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 22 AMIC Technology, Corp.

AC Characteristics

Erase and Program Operations

Parameter Speed

JEDEC Std

Description

-55 -70 -90

Unit

tAVAV tWC Write Cycle Time (Note 1) Min. 55 70 90 ns

tAVWL tAS Address Setup Time Min. 0 ns

tWLAX tAH Address Hold Time Min. 45 45 45 ns

tDVWH tDS Data Setup Time Min. 25 30 45 ns

tWHDX tDH Data Hold Time Min. 0 ns

tOES Output Enable Setup Time Min. 0 ns

tGHWL tGHWL Read Recover Time Before Write

(OE high to

low) Min. 0 ns

tELWL tCS CE Setup Time Min. 0 ns

tWHEH tCH CE Hold Time Min. 0 ns

tWLWH tWP Write Pulse Width Min. 30 35 45 ns

Min. 20 ns

tWHWL tWPH Write Pulse Width High Max. 50 µs

Byte Typ. 7

tWHWH1 tWHWH1 Byte Programming Operation

(Note 2) Word Typ. 12 µs

tWHWH2 tWHWH2 Sector Erase Operation (Note 2) Typ. 1 sec

tvcs VCC Set Up Time (Note 1) Min. 50 µs

tRB Recovery Time from RY/

Min 0 ns

tBUSY Program/Erase Valid to RY/

Delay Min 30 30 35 ns

Notes:

1. Not 100% tested.

2. See the "Erase and Programming Performance" section for more information.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 23 AMIC Technology, Corp.

Timing Waveforms for Program Operation

Addresses

Data

VCC

A0h PD

tWC

Program Command Sequence (last two cycles)

DOUT

Status

tAS

tVCS

Read Status Data (last two cycles)

555h

tAH

tWHWH1

tCH

tGHWL

tWP

tWPH

tCS tDS tDH

Note :

1. PA = program addrss, PD = program data, Dout is the true data at the program address.

2. Illustration shows device in word mode.

tRB

tBUSY

RY/BY

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 24 AMIC Technology, Corp.

Addresses

Data

VCC

55h 30h

tWC

Erase Command Sequence (last two cycles)

Complete

Progress

tAS

tVCS

Read Status Data

2AAh

tAH

tWHWH2

tCH

tGHWL

tWP

tWPH

tCS tDS tDH

Note :

1. SA = Sector Address (for Sector Erase), VA = Valid Address for reading status data (see "Write Operaion Ststus").

2. Illustratin shows device in word mode.

555h for chip erase

10h for chip erase

tRB

tBUSY

RY/BY

Timing Waveforms for Chip/Sector Erase Operation

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 25 AMIC Technology, Corp.

Timing Waveforms for Data Polling (During Embedded Algorithms)

Addresses

I/O7

tRC

VAVA VA

Complement

Complement True Valid Data High-Z

Status Data

Status Data True Valid Data High-Z

I/O0 - I/O6

tACC

tCE

tCH tOE

tOEH tDF

tOH

Note : VA = Valid Address. Illustation shows first status cycle after command sequence, last status read cycle, and array data

read cycle.

tBUSY

RY/BY

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 26 AMIC Technology, Corp.

Timing Waveforms for Toggle Bit (During Embedded Algorithms)

Note: VA = Valid Address; not required for I/O6. Illustration shows first two status cycle after command sequence, last status

read cycle, and array data read cycle.

Addresses

I/O6 , I/O2

tRC

VAVA VA

Valid Status

tACC

tCE

tCH tOE

tOEH tDF

tOH

Valid Status Valid Status Valid Data

(first read) (second read) (stop togging)

RY/BY

tBUSY

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 27 AMIC Technology, Corp.

Timing Waveforms for I/O2 vs. I/O6

AC Characteristics

Erase and Program Operations

Alternate CE Controlled Writes

Parameter Speed

JEDEC Std

Description

-55 -70 -90

Unit

tAVAV tWC Write Cycle Time (Note 1) Min. 55 70 90 ns

tAVEL tAS Address Setup Time Min. 0 ns

tELAX tAH Address Hold Time Min. 40 45 45 ns

tDVEH tDS Data Setup Time Min. 25 30 45 ns

tEHDX tDH Data Hold Time Min. 0 ns

tOES Output Enable Setup Time Min. 0 ns

tGHEL tGHEL Read Recover Time Before Write

(OE High to

Low) Min. 0 ns

tWLEL tWS

Setup Time Min. 0 ns

tEHWH tWH

Hold Time Min. 0 ns

tELEH tCP CE Pulse Width Min. 30 35 45 ns

tEHEL tCPH CE Pulse Width High Min. 20 20 20 ns

Byte Typ. 7

tWHWH1 tWHWH1 Programming Operation

(Note 2) Word Typ. 12 µs

tWHWH2 tWHWH2 Sector Erase Operation (Note 2) Typ. 1 sec

Notes:

3. Not 100% tested.

4. See the "Erase and Programming Performance" section for more information.

Enter

Embedded

Erasing

Erase

Suspend Enter Erase

Suspend Program Erase

Resume

I/O6

I/O2

Erase Erase Suspend

Read Erase Suspend

Read Erase Erase

Complete

I/O2 and I/O6 toggle with OE and CE

Note : Both I/O6 and I/O2 toggle with OE or CE. See the text on I/O6 and I/O2 in the section "Write Operation Statue" for

more information.

Erase

Suspend

Program

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 28 AMIC Technology, Corp.

Timing Waveforms for Alternate

Controlled Write Operation (RESET=VIH on A29400)

Addresses

Data

555 for program

2AA for erase

OUT

I/O

Data Polling

Note :

1. PA = Program Address, PD = Program Data, SA = Sector Address, I/O

= Complement of Data Input, D

OUT

= Array Data.

2. Figure indicates the last two bus cycles of the command sequence.

PD for program

30 for sector erase

10 for chip erase

BUSY

WHWH1 or 2

GHEL

CPH

PA for program

SA for sector erase

555 for chip erase

A0 for program

55 for erase

RESET

RY/BY

Erase and Programming Performance

Parameter Typ. (Note 1) Max. (Note 2) Unit Comments

Sector Erase Time 1.0 8 sec

Chip Erase Time 11 sec Excludes 00h programming

prior to erasure

Byte Programming Time 35 300 µs

Word Programming Time 12 500 µs

Byte Mode 3.6 10.8 sec Chip Programming Time

(Note 3) Word Mode 3.1 9.3 sec

Excludes system-level

overhead (Note 5)

Notes:

1. Typical program and erase times assume the following conditions: 25°C, 5.0V VCC, 10,000 cycles. Additionally,

programming typically assumes checkerboard pattern.

2. Under worst case conditions of 90°C, VCC = 4.5V (4.75V for -55), 100,000 cycles.

3. The typical chip programming time is considerably less than the maximum chip programming time listed, since most bytes

program faster than the maximum byte program time listed. If the maximum byte program time given is exceeded, only

then does the device set I/O5 = 1. See the section on I/O5 for further information.

4. In the pre-programming step of the Embedded Erase algorithm, all bytes are programmed to 00h before erasure.

5. System-level overhead is the time required to execute the four-bus-cycle command sequence for programming. See

Table 4 for further information on command definitions.

6. The device has a guaranteed minimum erase and program cycle endurance of 10,000 cycles.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 29 AMIC Technology, Corp.

Latch-up Characteristics

Description Min. Max.

Input Voltage with respect to VSS on all I/O pins -1.0V VCC+1.0V

VCC Current -100 mA +100 mA

Input voltage with respect to VSS on all pins except I/O pins

(including A9, OE and RESET) -1.0V 12.5V

Includes all pins except VCC. Test conditions: VCC = 5.0V, one pin at time.

TSOP and SOP Pin Capacitance

Parameter Symbol Parameter Description Test Setup Typ. Max. Unit

CIN Input Capacitance VIN=0 6 7.5 pF

COUT Output Capacitance VOUT=0 8.5 12 pF

CIN2 Control Pin Capacitance VIN=0 7.5 9 pF

Notes:

1. Sampled, not 100% tested.

2. Test conditions TA = 25°C, f = 1.0MHz

Data Retention

Parameter Test Conditions Min Unit

150°C 10 Years

Minimum Pattern Data Retention Time 125°C 20 Years

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 30 AMIC Technology, Corp.

Test Conditions

Test Specifications

Test Condition -55 All others Unit

Output Load 1 TTL gate

Output Load Capacitance, CL(including jig capacitance) 30 100 pF

Input Rise and Fall Times 5 20 ns

Input Pulse Levels 0.0 - 3.0 0.45 - 2.4 V

Input timing measurement reference levels 1.5 0.8, 2.0 V

Output timing measurement reference levels 1.5 0.8, 2.0 V

Test Setup

6.2 K

Ω

Device

Under

Test

CLDiodes = IN3064 or Equivalent

2.7 K

Ω

5.0 V

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 31 AMIC Technology, Corp.

Ordering Information

Top Boot Sector Flash

Part No. Access Time

(ns)

Active Read

Current

Typ. (mA)

Program/Erase

Current

Typ. (mA)

Standby Current

Typ. (µA) Package

A29400TM-55 44Pin SOP

A29400TV-55 55 20 30 1 48Pin TSOP

A29400TM-70 44Pin SOP

A29400TV-70 70 20 30 1 48Pin TSOP

A29400TM-90 44Pin SOP

A29400TV-90 90 20 30 1 48Pin TSOP

Bottom Boot Sector Flash

Part No. Access Time

(ns)

Active Read

Current

Typ. (mA)

Program/Erase

Current

Typ. (mA)

Standby Current

Typ. (µA) Package

A29400UM-55 44Pin SOP

A29400UV-55 55 20 30 1 48Pin TSOP

A29400UM-70 44Pin SOP

A29400UV-70 70 20 30 1 48Pin TSOP

A29400UM-90 44Pin SOP

A29400UV-90 90 20 30 1 48Pin TSOP

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 32 AMIC Technology, Corp.

Package Information

SOP 44L Outline Dimensions unit: inches/mm

See Detail F

Detail F

Seating Plane

A1A2

0.010"

Gauge Plane

Dimensions in inches Dimensions in mm

Symbol Min Nom Max Min Nom Max

A - - 0.118 - - 3.00

A1 0.004 - - 0.10 - -

A2 0.103 0.106 0.109 2.62 2.69 2.77

b 0.013 0.016 0.020 0.33 0.40 0.50

C 0.007 0.008 0.010 0.18 0.20 0.25

D - 1.122 1.130 - 28.50 28.70

E 0.490 0.496 0.500 12.45 12.60 12.70

e - 0.050 - - 1.27 -

HE 0.620 0.631 0.643 15.75 16.03 16.33

L 0.024 0.032 0.040 0.61 0.80 1.02

L1 - 0.0675 - - 1.71 -

S - - 0.045 - - 1.14

y - - 0.004 - - 0.10

θ 0° - 8° 0° - 8°

Notes:

1. The maximum value of dimension D includes end flash.

2. Dimension E does not include resin fins.

3. Dimension S includes end flash.

A29400 Series

PRELIMINARY (December, 2002, Version 0.2) 33 AMIC Technology, Corp.

Package Information

TSOP 48L (Type I) Outline Dimensions unit: inches/mm

Detail "A"

0.25

24 25

SA1

A2A

Detail "A"

Dimensions in inches Dimensions in mm

Symbol Min Nom Max Min Nom Max

A - - 0.047 - - 1.20

A1 0.002 - 0.006 0.05 - 0.15

A2 0.037 0.039 0.042 0.94 1.00 1.06

b 0.007 0.009 0.011 0.18 0.22 0.27

c 0.004 - 0.008 0.12 - 0.20

D 0.779 0.787 0.795 19.80 20.00 20.20

D1 0.720 0.724 0.728 18.30 18.40 18.50

E - 0.472 0.476 - 12.00 12.10

e 0.020 BASIC 0.50 BASIC

L 0.016 0.020 0.024 0.40 0.50 0.60

S 0.011 Typ. 0.28 Typ.

y - - 0.004 - - 0.10

θ 0° - 8° 0° - 8°

Notes:

1. The maximum value of dimension D includes end flash.

2. Dimension E does not include resin fins.

3. Dimension S includes end flash.