參數(shù)資料
型號: M37281MKH-XXXSP
廠商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
中文描述: 單芯片8位CMOS微機隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù): 117/172頁
文件大小: 1319K
代理商: M37281MKH-XXXSP
Rev.1.01 2003.07.16 page 117 of 170
M37281MAH–XXXSP,M37281MFH–XXXSP,M37281MKH–XXXSP, M37281EKSP
Fig.8.12.1 Sequence at Detecting Software Runaway Detection
8.12. SOFTWARE RUNAWAY DETECT FUNC-
TION
This microcomputer has a function to decode undefined instructions
to detect a software runaway.
When an undefined op-code is input to the CPU as an instruction
code during operation, the following processing is done.
The CPU generates an undefined instruction decoding signal.
The device is internally reset because of occurrence of the unde-
fined instruction decoding signal.
As a result of internal reset, the same reset processing as in the
case of ordinary reset operation is done, and the program restarts
from the reset vector.
Note, however, that the software runaway detecting function cannot
be invalid.
AD
H
,
AD
L
01,S
2
01,S
1
PC
H
PC
L
PS
AD
H
AD
L
PC
: Undefined instruction decode
: Invalid
: Program counter
: Stack pointer
AD
L
, AD
H
: Jump destination address of reset
Undefined instruction decoding signal
occurs.Internal reset signal occurs.
φ
SYNC
Address
Data
Reset sequence
01,S
FFFE
16
FFFF
16
S
PC
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