7220 Datasheet, PDF (191/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
5.3 Usage example of ROM correction function (M37221M8/MA-XXXSP)
E²PROM
address
02316
02416
02516
02616
02716
02816
02916
02A16
02B16
02C16
02D16
02E16
02F16
03016
03116
03216
03316
03416
03516
03616
03716
03816
03916
03A16
03B16
03C16
03D16
03E16
03F16
04016
04116
04216
04316
04416
04516
Contents
ROM correction function 2 Valid/invalid
(55H: valid, others: invalid)
ROM correction function 2
Execution address (high-order)
ROM correction function 2
Execution address (low-order)
ROM correction function 2 Correction code 1
ROM correction function 2 Correction code 2
ROM correction function 2 Correction code 3
ROM correction function 2 Correction code 4
ROM correction function 2 Correction code 5
ROM correction function 2 Correction code 6
ROM correction function 2 Correction code 7
ROM correction function 2 Correction code 8
ROM correction function 2 Correction code 9
ROM correction function 2 Correction code 10
ROM correction function 2 Correction code 11
ROM correction function 2 Correction code 12
ROM correction function 2 Correction code 13
ROM correction function 2 Correction code 14
ROM correction function 2 Correction code 15
ROM correction function 2 Correction code 16
ROM correction function 2 Correction code 17
ROM correction function 2 Correction code 18
ROM correction function 2 Correction code 19
ROM correction function 2 Correction code 20
ROM correction function 2 Correction code 21
ROM correction function 2 Correction code 22
ROM correction function 2 Correction code 23
ROM correction function 2 Correction code 24
ROM correction function 2 Correction code 25
ROM correction function 2 Correction code 26
ROM correction function 2 Correction code 27
ROM correction function 2 Correction code 28
ROM correction function 2 Correction code 29
ROM correction function 2 Correction code 30
ROM correction function 2 Correction code 31
ROM correction function 2 Correction code 32
Stored data
Instructions in
(Machine instruction) correction program
55H
FEH
96H
95H
25H
9DH
25H
01H
3AH
CAH
10H
F7H
60H
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
EAH
4CH
XXH
YYH
LDA 025H, X
LDA 0125H, X
INC
DEX
BPL
A
02E0H
RTS
NOP (see note)
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
JMP YYXXH
Set reset vector
address to YYXXH
(see note).
Note: When operating normally, this instruction is not executed. This is a redundant processing to
reset during program runaway.
Fig. 5.3.5 E²PROM map when using ROM correction function (2)
Refer to
“Figure 5.3.3
example A”
5-18
7220 Group User’s Manual