AM29LV002B 查看數據表（PDF） - Advanced Micro Devices

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AM29LV002B

2 Megabit (256 K x 8-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory

Advanced Micro Devices 

PRELIMINARY

Table 5. Am29LV002 Command Definitions

Command Sequence

(Note 1)

Read (Note 5)

Reset (Note 6)

Manufacturer ID

Device ID,

Top Boot Block

Device ID,

Bottom Boot Block

Sector Protect

Verify (Note 8)

Byte Program

Chip Erase

Sector Erase

Erase Suspend (Note 9)

Erase Resume (Note 10)

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

4 555 AA 2AA 55 555 90 X00 01

40

4 555 AA 2AA 55 555 90 X01

C2

4 555 AA

2AA

55

555

90

SA

X02

00

01

4 555 AA 2AA 55 555 A0 PA PD

6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10

6 555 AA 2AA 55 555 80 555 AA 2AA 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 are latched on the falling edge of the WE# or CE#

pulse.

PD = Data to be programmed at location PA. Data is latched

on the rising edge of WE# or CE# pulse.

SA = Address of the sector to be erased or verified. Address

bits A17–A13 uniquely select any sector.

Notes:

1. See Table 1 for descriptions 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 A17–A11 are don’t care for unlock and

command cycles, except when PA or SA is required.

5. No unlock or command cycles required when device is in

read mode.

6. The Reset command is required to return to the read

mode when the device is in the autoselect mode or if DQ5

goes high.

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.

9. The system may read and program functions 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.

10. The Erase Resume command is valid only during the

Erase Suspend mode.

Am29LV002

15

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