R8C/13 Group APPLICATION NOTE Flash Rewrite Using EW1 Mode
R8C/13 Group APPLICATION NOTE Flash Rewrite Using EW1 Mode
R8C/13 Group APPLICATION NOTE Flash Rewrite Using EW1 Mode
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<strong>R8C</strong>/<strong>13</strong> <strong>Group</strong><br />
<strong>Flash</strong> <strong>Rewrite</strong> <strong>Using</strong> <strong>EW1</strong> <strong>Mode</strong> (Data "FFh" Search)<br />
4.2 Flow Chart<br />
4.2.1 Main Function<br />
main()<br />
Set the main clock to XIN<br />
PRCR ← 0x02<br />
PM10 ← 1<br />
PRCR ← 0x00<br />
fmr4 ← 0x00<br />
Write address initial process<br />
write_address_init()<br />
Protect released<br />
The PM10 bit in the PM1 register is set to “1” and<br />
access in the data flash is enabled<br />
Protect set<br />
Reset the fmr40 bit to “0” (Erase suspend function<br />
disabled)<br />
Search the rewritable record from the data flash and set<br />
the write address (write_addr)<br />
Write data creation process<br />
Create the write data (write_data) in the data flash<br />
make_data(write_data)<br />
Data write control<br />
flash_write(write_data)<br />
Program error occurs?<br />
Execute the write control to the data flash<br />
The return value indicates whether the write process is<br />
completed (completed successfully / program error /<br />
erase error )<br />
Yes<br />
No<br />
Program error processed (1)<br />
Erase error occurs?<br />
Yes<br />
No<br />
Erase error processed (1)<br />
<strong>NOTE</strong>S:<br />
In this application note, error processes are not performed. Process errors if neede.<br />
REJ05B0444-0110Z/Rev.1.10 August 2004 Page 14 of 25
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