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A29040C

512K X 8 Bit CMOS 5.0 Volt-only, Uniform Sector Flash Memory

AMIC Technology 

A29040C Series

Table 4. A29040C Command Definitions

Command

Sequence

(Note 1)

Bus Cycles (Notes 2 - 4)

First

Second

Third

Fourth

Fifth

Sixth

Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data

Read (Notes 5, 6)

1 RA RD

Reset (Note 6)

1 XXX F0

Manufacturer ID

4 555 AA 2AA 55 555 90 X00 37

Device ID

Autoselect

Continuation ID

(Note 7)

4 555 AA 2AA 55 555

4 555 AA 2AA 55 555

Sector Protect Verify

(Note 8)

4

555

AA

2AA 55

555

90 X01 86

90 X03 7F

SA 00

90

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 WE or CE pulse,

whichever happens later.

PD = Data to be programmed at location PA. Data latches on the rising edge of WE or CE pulse, whichever happens first.

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. 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.

(March, 2015, Version 1.1)

10

AMIC Technology, Corp.

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