UPD784938 Datasheet, PDF (664/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 27 ROM CORRECTION
Table 27-1. Differences between 78K/IV ROM Correction and 78K/0 ROM Correction
Difference
Generated command codes
Address comparison conditions
Correction status flag
Jump destination address during correction
78K/IV
CALLT instruction
(1-byte instruction:
FCH, FDH, FEH, FFH)
Instruction fetch only
None
As there is a possibility that the
addresses match owing to an invalid
fetch, the status is not necessary
CALLT Table
0078H, 007AH, 007CH, 007EH
78K/0
Peripheral RAM
Instruction fetch only
Yes
Fixed address on the peripheral RAM
664
Preliminary User’s Manual U13987EJ1V0UM00