Table of Contents
Advertisement
MB90335 Series
■ E
2
PROM Memory Map
Figure 21.4-3 shows the allocation of the patch program and data at storing the patch program in E
●
Patch program byte count
The total byte count of the patch program (main body) is stored. If the byte count is "00
no patch program is provided.
●
Detect address (24 bits)
The address where the instruction code is replaced by the INT9 instruction code due to program error is
stored. This address is set in the Program address detection registers (PADR0, PADR1).
●
Patch program (main body)
The program executed by the INT9 interrupt processing when the program address matches the detect
address is stored. Patch program 0 is allocated from any predetermined address. Patch program 1 is
allocated from the address indicating <starting address of patch program 0 + total byte count of patch
program 0>.
CM44-10137-6E
21.4 Explanation of Operation of Address Match Detection Function
Figure 21.4-3 Allocation of E
2
E
PROM
Address
0 0 0 0
Patch program byte count
H
0 0 0 1
Detect address 0 (Low)
H
0 0 0 2
PADR0
Detect address 0 (Middle)
H
0 0 0 3
Detect address 0 (High)
H
0 0 0 4
Patch program byte count
H
0 0 0 5
Detect address 1 (Low)
H
0 0 0 6
PADR1
Detect address 1 (Middle)
H
0 0 0 7
Detect address 1 (High)
H
0 0 1 0
H
Patch program 0
(main body)
0 0 2 0
H
Patch program 1
(main body)
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 21 ADDRESS MATCH DETECTION FUNCTION
2
PROM Patch Program and Data
For patch program 0
For patch program 1
2
PROM.
", it indicates that
H
469
Advertisement
Table of Contents
