AN2400 Freescale Semiconductor / Motorola, AN2400 Datasheet - Page 46

• Manufacturer Part Number: AN2400
• Description: HCS12 NVM Guidelines
• Manufacturer: Freescale Semiconductor / Motorola

AN2400/D
46
10. Write $00 to the FCNFG register to select Flash block 0.
11. Write $10 to the FTSTMOD register ($0102) to set the WRALL bit, so the
12. Write $FF to the FPROT register to disable protection.
13. Write $30 to the FSTAT register to clear the PVIOL and ACCERR bits.
14. Write $0000 to the FDATA register ($010A–$010B)
15. Write $0000 to the FADDR register ($0108–$0109)
16. Write $41 (Mass Erase) to the FCMD register.
17. Write $80 to the FSTAT register to clear CBEIF.
18. Wait until all CCIF flags are set.
19. Reset back into Special Single Chip mode
20. Write an appropriate value to the FCLKDIV register for correct timing.
21. Write $00 to the FCNFG register to select Flash block 0.
22. Write $FF to the FPROT register to disable protection.
23. Write $FFBE to Flash address $FF0E
24. Write $20 (Program) to the FCMD register.
25. Write $80 to the FSTAT register to clear CBEIF.
26. Wait until the CCIF flag in FSTAT is are set.
27. Reset into any mode.
7. Write $41 (Mass Erase) to the ECMD register.
8. Write $80 to the ESTAT register to clear CBEIF.
9. Write an appropriate value to the FCLKDIV register for correct timing.
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following writes affect all flash blocks.
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HCS12 NVM Guidelines
MOTOROLA