NEC mPD780344 Series User Manual page 427

Figure 22-9. Program Transition Diagram (When Two Places Are Corrected)
FFFFH
F7FFH
F7FDH
yyyyH
Internal
expansion
RAM
xxxxH
JUMP
0000H
(1) Branches to address F7FDH when fetch address matches correction address
(2) Branches to branch destination judgment program
(3) Branches to correction program 1 by branch destination judgment program (BTCLR !CORST0, $xxxxH)
(4) Returns to internal ROM (on-chip flash memory) program
(5) Branches to address F7FDH when fetch address matches correction address
(6) Branches to branch destination judgment program
(7) Branches to correction program 2 by branch destination judgment program (BTCLR !CORST1, $yyyyH)
(8) Returns to internal ROM (on-chip flash memory) program
Caution Do not use internal high-speed RAM and LCD display RAM for ROM correction area.
Remark JUMP: Correction program start address
CHAPTER 22 ROM CORRECTION
BR !JUMP
Correction program 2
Correction program 1
Destination judge program
Internal ROM
(on-chip flash memory)
Correction place 2
Internal ROM
(on-chip flash memory)
Correction place 1
Internal ROM
(on-chip flash memory)
User's Manual U15798EJ2V0UD
(6)
(2)
(3)
(4)
(5)
(1)
(7)
(8)
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