Fujitsu MB90335 Series Hardware Manual page 492

MB90335 Series
■ Operation of Address Match Detection Function at Storing Patch Program in
2
E PROM
Figure 21.4-4 shows the operation of the address match detection function at storing the patch
program in E
Figure 21.4-4 Operation of Address Match Detection Function at Storing Patch Program in E
000000
RAM
ROM
FFFFFF
(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
CM44-10137-6E
21.4 Explanation of Operation of Address Match Detection Function
2
PROM.
H
(3)
Patch program
Program address detection register
(1)
(2)
Program error
(4)
H
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 21 ADDRESS MATCH DETECTION FUNCTION
. Patch program byte count
. Address for address detection
2
Serial E PROM
. Patch program
interface
2
PROM
2
E PROM
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