Fujitsu MB90895 Series Hardware Manual page 585

I Operation of Address Match Detection Function at Storing Patch Program in E
Figure 17.4-4 shows the operation of the address match detection function at storing the patch program in
2
E PROM.
Figure 17.4-4 Operation of Address Match Detection Function at Storing Patch Program in E
RAM
ROM
(1) Execution of detection address setting of reset sequence and normal program
(2) Branch to patch program which expanded in RAM with INT9 interrupt processing by
address match detection
(3) Patch program execution by branching of INT9 processing
(4) Execution of normal program which branches from patch program
000000
H
(3)
Patch program
Detect address setting registers
(1)
(2)
Program error
(4)
FFFFFF
H
CHAPTER 17 Address Match Detecting Function
E
• Pach program byte count
• Address detection address
2
Serial E PROM
• Patch program
Interface
2
2
PROM
2
PROM
PROM
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