M38197MA Datasheet, PDF (41/60 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3819 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
b7
b0
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)/256
1 : f(XIN)/512
Noise filter sampling clock selection bits(INT2)
0 0 : Filter stop
0 1 : f(XIN)/64
1 0 : f(XIN)/128
1 1 : f(XIN)/256
One-sided/both-sided edge detection selection bit
0 : One-sided edge detection
1 : Both-sided edge detection
Not used (return “0” when read)
Fig. DE-2 Structure of interrupt interval determination control register
(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
N
0
1
2
3
4
5
6
0
1
2
3
0
FE ^FF
1
0
6
3
FF
N
Remote control
interrupt request
6
3
FF
Remote control
Remote control
Counter overflow
interrupt request
interrupt request
interrupt request
Fig. DE-3 Interrupt interval determination operation example (at rising edge active)
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