M38B74FD datasheet(67/110 Pages) RENESAS

67 / 110 page

38B7 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

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.)

Remote control

interrupt request

(When IIDCON4 = “0”)

Noise filter

sampling clock

INT2 pin

Acceptance of

interrupt

Counter sampling

clock

8-bit binary up

counter value

Interrupt interval

determination

Remote control

interrupt request

Counter overflow

interrupt request

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

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

M38B74FD Datasheet(PDF) 67 Page - Renesas Technology Corp

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