AM29LV081B Просмотр технического описания (PDF) - Advanced Micro Devices

Номер в каталоге

Компоненты Описание

производитель

AM29LV081B

8 Megabit (1 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory

Advanced Micro Devices 

DATA SHEET

Command Definitions

Table 4. Am29LV081B Command Definitions

Command

Sequence

(Note 1)

Read (Note 5)

Reset (Note 6)

Manufacturer ID

Auto- Device ID

select

(Note 7) Sector Protect Verify

(Note 8)

Program

Unlock Bypass

Unlock Bypass Program (Note 9)

Unlock Bypass Reset (Note 10)

Chip Erase

Sector Erase

Erase Suspend (Note 11)

Erase Resume (Note 12)

Bus Cycles (Notes 2-4)

First

Second

Third

Fourth

Fifth

Sixth

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

1 RA RD

1 XXX F0

4 XXX AA XXX 55 XXX 90 X00 01

4 XXX AA XXX 55 XXX 90 X01 38

XXX

XXX

XXX

4

AA

55

XXX

XXX

XXX

90

(SA)

X02

00

01

4 XXX AA XXX 55 XXX A0 PA PD

3 XXX AA XXX 55 XXX 20

2 XXX A0 XXX PD

2 XXX 90 XXX 00

6 XXX AA XXX 55 XXX 80 XXX AA XXX 55 XXX 10

6 XXX AA XXX 55 XXX 80 XXX AA XXX 55 SA 30

1 XXX B0

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 A19–A13 uniquely select any sector.

Notes:

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 operations.

4. All address bits are don’t cares for unlock and command

cycles, except when 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 DQ5 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 Unlock Bypass command is required prior to the Unlock

Bypass Program command.

10. The Unlock Bypass Reset command is required to return to

reading array data when the device is in the unlock bypass

mode.

11. The system may read and program in non-erasing sectors, or

enter the autoselect mode, when in the Erase Suspend

mode. The Erase Suspend command is valid only during a

sector erase operation.

12. The Erase Resume command is valid only during the Erase

Suspend mode.

16

Am29LV081B

21525D6 October 12, 2006

Share Link: