AM29LV008BT-70RFE View Datasheet(PDF) - Advanced Micro Devices

Part Name

Description

Manufacturer

AM29LV008BT-70RFE

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

Advanced Micro Devices 

PRELIMINARY

Table 5. Am29LV008B Command Definitions

Command

Sequence

(Note 1)

Read (Note 5)

1

Reset (Note 6)

1

Manufacturer ID

4

Auto- Device ID, Top Boot Block

4

select Device ID, Bottom Boot Block 4

(Note 7) Sector Protect Verify

(Note 8)

4

Program

4

Unlock Bypass

3

Unlock Bypass Program (Note 9)

2

Unlock Bypass Reset (Note 10)

2

Chip Erase

6

Sector Erase

6

Erase Suspend (Note 11)

1

Erase Resume (Note 12)

1

First

Addr Data

RA RD

XXX F0

555 AA

555 AA

555 AA

555 AA

555 AA

555 AA

XXX A0

XXX 90

555 AA

555 AA

XXX B0

XXX 30

Second

Addr Data

2AA 55

2AA 55

2AA 55

2AA 55

2AA 55

2AA 55

PA PD

XXX 00

2AA 55

2AA 55

Bus Cycles (Notes 2-4)

Third

Fourth

Addr Data Addr Data

555 90 X00 01

555 90 X01 3E

555 90 X01 37

555

90

(SA)

X02

00

01

555 A0 PA PD

555 20

555 80 555 AA

555 80 555 AA

Fifth

Sixth

Addr Data Addr Data

2AA 55 555 10

2AA 55 SA 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. Address bits A19–A11 are don’t cares for unlock and

command cycles.

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

Am29LV008B

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