S29AS008J datasheet(31/56 Pages) CYPRESS

31 / 56 page

Document Number: 002-00870 Rev.*K

Page 31 of 56

S29AS008J

Notes

1. See Table on page 9 for description of bus operations.

2. All values are in hexadecimal.

3. Except for the read cycle and the fourth cycle of the autoselect command

sequence, all bus cycles are write cycles.

4. Data bits DQ15–DQ8 are don’t cares for unlock and command cycles.

5. Address bits A18–A11 are don’t cares for unlock and command cycles,

unless 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. For top boot, 89h = factory locked, 09h = not factory locked. For bottom boot,

91h = factory locked, 11h = not factory locked.

10. The data is 00h for an unprotected sector and 01h for a protected sector. See

Autoselect Command Sequence on page 25 for more information.

11. Command is valid when device is ready to read array data or when device is

in autoselect mode.

12. The Unlock Bypass command is required prior to the Unlock Bypass Program

command.

13. The Unlock Bypass Reset command is required to return to reading array

data when the device is in the unlock bypass mode. F0 is also acceptable.

14. 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.

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

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