Fujitsu FR81S User Manual
CHAPTER 46: WORKFLASH MEMORY
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : WORKFLASH MEMORY
FUJITSU SEMICONDUCTOR CONFIDENTIAL
28
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 (inverted data) of the bit7’s value of the last written data is read out.
The following figure shows an example of write operation to the flash memory.
MB91520 Series
MN705-00010-1v0-E
1999