Fujitsu MB90390 Series Hardware Manual page 578

CHAPTER 26 ADDRESS MATCH DETECTION FUNCTION
YES
FFFF
H
0090
H
0010
H
0003
H
0002
H
0001
H
0000
H
550
Figure 26.4-3 Flow of Program Patch Processing
Reset
2
Reads "00 " of E PROM
H
2
"0000 " (E PROM)=0
H
NO
Read address
2
"0001 " to "0003 " (E PROM)
H H
MOV
PADR0 (MCU)
Read patch program
2
"0010 " to "0090 " (E PROM)
H H
MOV
"000400 " to "000480 " (MCU)
H H
Enable compare
MOV PACSR, #02H
Execute normal program
PC=PADR0
YES
INT9
2
E PROM
Patch program
Program address
low-order: 00
Program address
middle-order: 00
Program address
high-order: FF
Number of bytes of
the patch program: 80
Terminate patch program
NO
FFFFFF
H
FF0050
H
ROM
FF0000
H
FE0000
H
001100
H
000480
H
RAM
000400
H
000100
H
000000
H
INT9
To patch program
JMP 000400H
Execute patch program
"000400 " to "000480 "
H H
JMP FF0050H
Abnormal program
Stack area
RAM area
Patch program
RAM and register area
I/O area