Fujitsu FR81S Manuel D’Utilisation
CHAPTER 45: FLASH MEMORY
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : FLASH MEMORY
FUJITSU SEMICONDUCTOR CONFIDENTIAL
38
5.5. Write Command
The write command is shown below
Writes are performed in the following order.
1. Send write commands sequentially to the target sector
The automatic algorithm is started and data is written to the flash memory. After issuing a write
command, there is no need to control the flash memory externally.
2. Perform read access to the written address
The read data is the hardware sequence flag. Therefore, if bit7 (DPOLL bit) of the read data matches
the written data, the write to the flash memory has finished. If the write has not finished, the
opposite value (inverse data) of the value of bit7 of the last written data is read out.
The following shows an example of a write operation to the flash memory.
MB91520 Series
MN705-00010-1v0-E
1959