S29AL008D55BAI011 datasheet(24/55 Pages) SPANSION

24 / 55 page

S29AL008D

S29AL008D_00A3 June 16, 2005

Da t a

S h ee t

Sector Erase time-out immediately terminates the time-out period and suspends

the erase operation. Addresses are don’t-cares when writing the Erase Suspend

command.

When the Erase Suspend command is written during a sector erase operation, the

device requires a maximum of 20 µs to suspend the erase operation. However,

when the Erase Suspend command is written during the sector erase time-out,

the device immediately terminates the time-out period and suspends the erase

operation.

After the erase operation is suspended, the system can read array data from or

program data to any sector not selected for erasure. (The device erase suspends

all sectors selected for erasure.) Normal read and write timings and command

definitions apply. Reading at any address within erase-suspended sectors pro-

duces status data on DQ7–DQ0. The system can use DQ7, or DQ6 and DQ2

together, to determine if a sector is actively erasing or is erase-suspended. See

Write Operation Status, on page 27 for information on these status bits.

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, on page 27 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 Com-

mand Sequence, on page 20 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 resumes erasing.

S29AL008D55BAI011 数据表(PDF) 24 Page - SPANSION