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MX29F800CB

8M-BIT [1024K x 8 / 512K x 16] SINGLE VOLTAGE 5V ONLY FLASH MEMORY

Integrated Device Technology 

MX29F800C T/B

SECTOR PROTECT OPERATION

When a sector is protected, program or erase operation will be disabled on these sectors. MX29F800C T/B pro-

vides one method for sector protection.

Once the sector is protected, the sector remains protected until next chip unprotect, or is temporarily unprotected

by asserting RESET# pin at Vhv. Refer to temporary sector unprotect operation for further details.

This method is by applying Vhv on RESET# pin. Refer to Figure 12 for timing diagram and Figure 13 for the al-

gorithm for this method.

CHIP UNPROTECT OPERATION

MX29F800C T/B provides one method for chip unprotect. The chip unprotect operation unprotects all sectors

within the device. It is recommended to protect all sectors before activating chip unprotect mode. All sector are

unprotected when shipped from the factory.

This method is by applying Vhv on RESET# pin. Refer to Figure 12 for timing diagram and Figure 13 for algo-

rithm of the operation.

TEMPORARY SECTOR UNPROTECT OPERATION

System can apply RESET# pin at Vhv to place the device in temporary unprotect mode. In this mode, previously

protected sectors can be programmed or erased just as it is unprotected. The devices returns to normal opera-

tion once Vhv is removed from RESET# pin and previously protected sectors are again protected.

AUTOMATIC SELECT OPERATION

When the device is in Read array mode or erase-suspended read array mode, user can issue read silicon ID

command to enter read silicon ID mode. After entering read silicon ID mode, user can query several silicon IDs

continuously and does not need to issue read silicon ID mode again. When A0 is Low, device will output Ma-

cronix Manufacture ID C2. When A0 is high, device will output Device ID. In read silicon ID mode, issuing reset

command will reset device back to read array mode or erase-suspended read array mode.

Another way to enter read silicon ID is to apply high voltage on A9 pin with CE#, OE# and A1 at Vil. While the

high voltage of A9 pin is discharged, device will automatically leave read silicon ID mode and go back to read

array mode or erase-suspended read array mode. When A0 is Low, device will output Macronix Manufacture ID

C2. When A0 is high, device will output Device ID.

P/N:PM1493

REV. 1.2, JUL. 05, 2012

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