5962-9669201HTA データシートの表示（PDF） - Austin Semiconductor

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5962-9669201HTA

512K x 8 FLASH UNIFORM SECTOR 5.0V FLASH MEMORY

Austin Semiconductor 

Austin Semiconductor, Inc.

FLASH

AS29F040

After an erase-suspended program operation is complete,

the system can once again read array data within

non-suspended sectors. The system can determine the status

of the program operation using the DQ7 or DQ6 status bits, just

as in the standard program operation. See “Write Operation

Status” for more information.

The system may also write the autoselect command

sequence when the device is in the Erase Suspend mode. The

device allows reading autoselect codes even at addresses within

erasing sectors, since the codes are not stored in the memory

array. When the device exits the autoselect mode, the device

reverts to the Erase Suspend mode, and is ready for another

valid operation. See “Autoselect Command Sequence” for more

information.

The system must write the Erase Resume command

(address bits are “don’t care”) to exit the erase suspend mode

and continue the sector erase operation. Further writes of the

Resume command are ignored. Another Erase Suspend

command can be written after the device has resumed erasing.

TABLE 4: Command Definitions

Command Sequence1

Read5

Reset6

Autoselect7

Manufacturer ID

Device ID

Sector Protect Verify8

Program

Chip Erase

Sector Erase

Erase Suspend9

Erase Resume10

Bus Cycles2,3,4

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

4 555 AA 2AA 55 555 90 X01 A4

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 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 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 command bus cycles are write operations.

4. Address bits A18 - A11 are don’t care 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 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 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.

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

AS29F040

Rev. 2.2 09/07

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

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