11.10 Command Definitions Table

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, whichever happens later.

Notes

1.See Table 7.1 on page 12 for descriptions of bus operations.

2.All values are in hexadecimal. Except when reading array or autoselect data, all bus cycles are write operations.

3.Address bits are don’t care for unlock and command cycles, except when PA or SA is required.

4.No unlock or command cycles required when device is in read mode.

5.The Reset command is required to return to the read mode when the device is in the autoselect mode or if DQ5 goes high.

6.The fourth cycle of the autoselect command sequence is a read cycle.

7.In the third and fourth cycles of the command sequence, set A21 to 0.

8.In the third cycle of the command sequence, address bit A21 must be set to 0 if verifying sectors 0–31, or to 1 if verifying sectors 32–64. The data in the fourth cycle is 00h for an unprotected sector/sector block and 01h for a protected sector/sector block.

PD = Data to be programmed at location PA. Data is latched on the rising edge of WE# or CE# pulse, whichever happens first.

SA = Address of the sector to be erased or verified. Address bits A21–A16 uniquely select any sector.

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 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.

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

13.Command is valid when device is ready to read array data or when device is in autoselect mode.

14.The data is 85h for factory locked and 05h for not factory locked.

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, whichever happens later.

PD = Data to be programmed at location PA. Data is latched on the rising edge of WE# or CE# pulse, whichever happens first.

SA = Address of the sector to be erased or verified. Address bits A19–A12 uniquely select any sector.

Notes

1.See Table 7.1 on page 12 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 A19–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 Model 03, the data is 8Dh for factory locked and 0Dh for not factory locked. For Model 04, the data is 9Dh for factory locked and 1Dh for not factory locked.

10.The data is 00h for an unprotected sector and 01h for a protected sector. See “Autoselect Command Sequence”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. F0h 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.

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, whichever happens later.

PD = Data to be programmed at location PA. Data is latched on the rising edge of WE# or CE# pulse, whichever happens first.

SA = Address of the sector to be erased or verified. Address bits A19–A12 uniquely select any sector.

Notes

1.See Table 7.1 on page 12 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 A19–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 Model 03, the data is 8Dh for factory locked and 0Dh for not factory locked. For Model 04, the data is 9Dh for factory locked and 1Dh for not factory locked.

10.The data is 00h for an unprotected sector and 01h for a protected sector. See “Autoselect Command Sequence”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.