Starting The Flash Memory Automatic Algorithm - Fujitsu F2MC-8L F202RA Hardware Manual

17.3

Starting the Flash Memory Automatic Algorithm

Four types of commands are available for starting the flash memory automatic
algorithm: Read/Reset, Write, and Chip Erase.
■
Command Sequence Table
Table 17.3-1 lists the commands used for flash memory write/erase.
Table 17.3-1 Command Sequence Table
Command Bus 1st bus write
sequence write
access
Address
1 XXXX
Read/Reset
(*)
4 FAAA
Write
4 FAAA
program
Chip Erase 6 FAAA
*: Both of the two types of Read/Reset commands can reset the flash memory to read mode.
Notes:
• The addresses shown in the table are those on the CPU memory map. All addresses and data are represented in
hexadecimal notation. The letter X indicates an appropriate value.
RA: Read address
PA: Write address.
RD: Read data
PD: Write data.
• The flash memory can only accept the command sequences mentioned on the above table (Read/Reset, Write
program, Chip Erase), other command sequences are strictly prohibited to be sent to the flash memory or else the
flash memory may become malfunction.
2nd bus write
cycle cycle
Data Address Data
F0 - -
AA F554 55
AA F554 55
AA F554 55
3rd bus write 4th bus read/
cycle write cycle
Address Data Address
- - -
FAAA F0 RA
FAAA A0 PA
FAAA 80 FAAA
CHAPTER 17 FLASH MEMORY
5th bus write 6th bus write
cycle
Data Address Data Address
- - -
RD - -
PD - -
AA F554 55 FAAA
cycle
Data
- -
- -
- -
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