AM29LV400BT-55RSE データシートの表示（PDF） - Advanced Micro Devices

部品番号

コンポーネント説明

メーカー

AM29LV400BT-55RSE

4 Megabit (512 K x 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

Advanced Micro Devices 

DATA SHEET

Command Definitions

Table 5. Am29LV400B Command Definitions

Command

Sequence

(Note 1)

Read (Note 6)

Reset (Note 7)

Manufacturer ID

Device ID,

Top Boot Block

Device ID,

Bottom Boot Block

First

Second

Addr Data Addr Data

1 RA RD

1 XXX F0

Word

555

2AA

4

AA

55

Byte

AAA

555

Word

555

2AA

4

AA

55

Byte

AAA

555

Word

555

2AA

4

AA

55

Byte

AAA

555

Sector Protect Verify

(Note 9)

Word

555

2AA

4

AA

55

Byte

AAA

555

Program

Word

555

2AA

4

AA

55

Byte

AAA

555

Unlock Bypass

Word

555

2AA

3

AA

55

Byte

AAA

555

Unlock Bypass Program (Note 10) 2 XXX A0 PA PD

Unlock Bypass Reset (Note 11)

2 XXX 90 XXX 00

Chip Erase

Word

555

2AA

6

AA

55

Byte

AAA

555

Sector Erase

Word

555

2AA

6

AA

55

Byte

AAA

555

Erase Suspend (Note 12)

1 XXX B0

Erase Resume (Note 13)

1 XXX 30

Bus Cycles (Notes 2–5)

Third

Fourth

Addr Data Addr Data

Fifth

Sixth

Addr Data Addr Data

555

AAA

555

AAA

555

AAA

555

AAA

555

AAA

555

AAA

90 X00 01

X01 22B9

90

X02 B9

X01 22BA

90

X02 BA

(SA) XX00

X02 XX01

90

(SA) 00

X04 01

A0 PA PD

20

555

AAA

555

AAA

555

2AA

555

80

AA

55

10

AAA

555

AAA

555

2AA

80

AA

55 SA 30

AAA

555

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 A17–A12 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. Data bits DQ15–DQ8 are don’t cares for unlock and command

cycles.

5. Address bits A17–A11 are don’t cares for unlock and

command cycles, except when SA or PA required.

6. No unlock or command cycles required when reading array

data.

7. 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).

8. The fourth cycle of the autoselect command sequence is a

read cycle.

9. The data is 00h for an unprotected sector and 01h for a

protected sector. See “Autoselect Command Sequence” for

more information.

10. The Unlock Bypass command is required prior to the Unlock

Bypass Program command.

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

reading array data when the device is in the unlock bypass

mode.

12. 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.

13. The Erase Resume command is valid only during the Erase Suspend mode.

December 4, 2006 21523D4

Am29LV400B

19

Share Link: