參數(shù)資料
型號(hào)： M34250
廠商： Mitsubishi Electric Corporation
英文描述： Single Chip 4 Bits CMOS Microcomputer(4位單片機(jī))
中文描述： 4位單片微機(jī)的CMOS（4位單片機(jī)）
文件頁(yè)數(shù)： 18/58頁(yè)
文件大小： 331K
代理商： M34250
MITSUBISHI
ELECTRIC
18
MITSUBISHI MICROCOMPUTERS
4250 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
EXTERNAL INTERRUPTS
The 4250 Group has an external interrupt. An external interrupt
request occurs when a valid waveform is input to an interrupt
input pin (edge detection).
The external interrupt can be controlled with the key-on wakeup
control register K0.
Table 7 External interrupt activated condition
Name
External interrupt
Input pin
G
0
/INT
Valid waveform
Falling waveform (“H”
→
“L”)
Rising waveform (“L”
→
“H”)
Valid waveform selection bit(K0
2
)
1
0
Fig. 17 External interrupt circuit structure
OGA
instruction
D
T
Q
IAG
instruction
Register A
A
0
PU0
0
G
0
/INT pin
Pull-up transistor
EXF0
Key-on wakeup
input
K0
2
0
1
Falling
Rising
External interrupt
(Note)
This symbol represents a
parasitic diode.
Applied potential to port G
0
must be V
DD
or less.
Note:
eOcircuit
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