Flash Memory Sector Erase Suspension - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 25 3M-BIT FLASH MEMORY
25.6.5

Flash Memory Sector Erase Suspension

This section describes the procedure to issue the sector erase suspend command and
suspend the sector erase of flash memory. Data can be read from the sector not being
deleted.
Flash Memory Sector Erase Suspension
To suspend the sector erase of the flash memory, you can perform the suspension by sending the sector
erase suspend command in the command sequence table (See Table 25.4-1) to the flash memory.
The sector erase suspend command enables you to suspend the erase while erasing a sector and read data
from the sector that is not being erased. In this state, you can only read but cannot write. This command is
enabled only when a sector is being erased including the erase wait time and ignored while erasing or
writing to a chip.
This command can be executed by writing the erase suspend code (B0
indicate any address in the flash memory. The sector erase suspend command is ignored at the second time
for erase suspend.
If the sector erase suspend command is entered during a sector erase wait period, sector erase wait is
finished immediately and erase operation is stopped, and the state enters in erase-terminated condition.
During sector deletion following the waiting period for sector deletion, if a deletion suspension command is
input, deletion suspension status starts after a maximum of 15 µs. The sector erase suspend command is
performed after 20 µs following the issuance of the sector erase command or sector erase resume
command.
584
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