A29L040A Series

PRELIMINARY (March, 2005, Version 0.0)

10

AMIC Technology, Corp.

Table 4. A29L040A Command Definitions

Bus Cycles (Notes 2 - 4)

First

Second

Third

Fourth

Fifth

Sixth

Command

Sequence

(Note 1)

Addr Data

Addr Data

Addr Data Addr

Data

Addr Data Addr Data

Read (Note 5)

1

RA

RD

Reset (Note 6)

1

XXX

F0

Manufacturer ID

4

555

AA

2AA

55

555

90

X00

37

Device ID

4

555

AA

2AA

55

555

90

X01

92

Continuation ID

4

555

AA

2AA

55

555

90

X03

7F

00

Autoselect

(Note 7)

Sector Protect Verify

(Note 8)

4

555

AA

2AA

55

555

90

SA

X02

01

Program

4

555

AA

2AA

55

555

A0

PA

PD

Chip Erase

6

555

AA

2AA

55

555

80

555

AA

2AA

55

555

10

Sector Erase

6

555

AA

2AA

55

555

80

555

AA

2AA

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

whichever happens later.

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

SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits A18 - A16 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 A18 - 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.

(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.