Enable program mode
1. Enter OCD(=ISP) mode.
NOTE1
2. Set ENBDM bit of BCR.
3. Enable debug and Request debug mode.
4. Enter program/erase mode sequence.
NOTE2
A. Write 0xAA to 0xF555.
B. Write 0x55 to 0xFAAA.
C. Write 0xA5 to 0xF555.
NOTES:
1. Refer to how to enter ISP mode.
2. Command sequence to activate Flash write/erase mode. It is composed of sequentially writing data of
Flash memory.
Flash write mode
1. Enable program mode.
2. Reset page buffer. FEMR: 1000_0001 FECR:0000_0010
3. Select page buffer. FEMR:1000_1001
4. Write data to page buffer (Address automatically increases by twin).
5. Set write mode. FEMR:1010_0001
6. Set page address. FEARH:FEARM:FEARL=20’hx_xxxx
7. Set FETCR.
8. Start program. FECR:0000_1011
9. Insert one NOP operation
10. Read FESR until PEVBSY is 1.
11. Repeat Steps from 2 to 8 until all pages are written.
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