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M38B71M1 Datasheet(PDF) 67 Page - Renesas Technology Corp

Part No. M38B71M1
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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M38B71M1 Datasheet(HTML) 67 Page - Renesas Technology Corp

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38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
66
Interrupt interval determination control register
(IIDCON: address 003116)
Interrupt interval determination circuit operating selection bit
0 : Stopped
1 : Operating
Counter sampling clock selection bit
0 : f(XIN)/128 or f(XCIN)
1 : f(XIN)/256 or f(XCIN)/2
Noise filter sampling clock selection bits (INT2)
b3b2
0 0 : Filter stop
0 1 : f(XIN)/32 or f(XCIN)
1 0 : f(XIN)/64 or f(XCIN)/2
1 1 : f(XIN)/128 or f(XCIN)/4
One-sided/both-sided edge detection selection bit
0 : One-sided edge detection
1 : Both-sided edge detection (can be used when using a noise filter)
Not used (return “0” when read)
(Do not write “1” to these bits.)
b7
b0
Remote control
interrupt request
0
1
2
3
4
5
6
1
2
3
0
FE
FF
N
FF
0
FF
6
6
N
1
N
(When IIDCON4 = “0”)
Noise filter
sampling clock
INT2 pin
Acceptance of
interrupt
Counter sampling
clock
8-bit binary up
counter value
Interrupt interval
determination
register value
Remote control
interrupt request
Counter overflow
interrupt request
0
1
1
0
FE
FF
2
FF
2
3
3
FF
2
N
N
N
3
2
2
2
0
1
2
1
0
1
0
2
Remote control
interrupt request
(When IIDCON4 = “1”)
Noise filter
sampling clock
INT2 pin
Acceptance of
interrupt
Counter sampling
clock
8-bit binary up
counter value
Interrupt interval
determination
register value
Remote control
interrupt request
Counter overflow
interrupt request
Remote control
interrupt request
Remote control
interrupt request
Fig. 71 Interrupt interval determination operation example (at both-sided edge active)
Fig. 70 Interrupt interval determination operation example (at rising edge active)
Fig. 69 Structure of interrupt interval determination control register


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