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參數(shù)資料
| 型號： | M37272M8-134SP |
| 廠商： | Mitsubishi Electric Corporation |
| 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)： | 91/131頁 |
| 文件大小： | 1297K |
| 代理商： | M37272M8-134SP |
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91
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37272M6H/M8H/MAH/MFH–XXXSP/FP
M37272E8SP/FP, M37272EFSP/FP
MITSUBISHI MICROCOMPUTERS
Rev 1.0
Fig.8.12.1 Sequence at Detecting Software Runaway Detection
8.12 SOFTWARE RUNAWAY DETECT FUNCTION
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
Undefined instruction decoding signal
occurs.Internal reset signal occurs.
φ
SYNC
Address
Data
Reset sequence
01,S
FFFE
16
FFFF
16
: Invalid
: Program counter
: Stack pointer
S
PC
AD
L
, AD
H
: Jump destination address of reset
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