M38B53M4-059FP datasheet(225/355 Pages) MITSUBISHI

225 / 355 page

38B5 Group User’s Manual

APPLICATION

2-137

2.7 Interrupt interval determination function

Fig. 2.7.3 Structure of interrupt interval determination control register

Fig. 2.7.4 Structure of interrupt edge selection register

Interrupt interval determination control register

b7 b6 b5 b4 b3 b2 b1 b0

Interrupt interval determination control register

(IIDCON: address 3116)

0: Stopped

1: Operating

Name

Functions

At reset R W

0: f(XIN)/128

1: f(XIN)/256

0 0: Filter is not used.

0 1: f(XIN)/32

1 0: f(XIN)/64

1 1: f(XIN)/128

Counter sampling

clock selection bit

One-sided/both-

sided edge

detection selection

bit

Noise filter

sampling clock

selection bits (INT2)

b3 b2

0: One-sided edge

detection

1: Both-sided edge

detection (Note)

Interrupt interval

determination circuit

operating selection

bit

Nothing is arranged for these bits. These are

write disabled bits. When these bits are read

out, the contents are “0”.

Note: When the noise filter sampling clock selection bits (bits 2, 3) is

“00”, the both-sided edge detection function cannot be used.

Interrupt edge selection register

b7 b6 b5 b4 b3 b2 b1 b0

Interrupt edge selection register

(INTEDGE : address 3A16)

Name

Functions

At reset R W

INT0 interrupt edge

selection bit

INT1 interrupt edge

selection bit

INT3 interrupt edge

selection bit (Note)

INT4 interrupt edge

selection bit

INT2 interrupt edge

selection bit

0 : Falling edge active

1 : Rising edge active

0 : Falling edge active

1 : Rising edge active

0 : Falling edge active

1 : Rising edge active

0 : Falling edge active

1 : Rising edge active

0 : Falling edge active

1 : Rising edge active

CNTR0 pin edge

switch bit

CNTR1 pin edge

switch bit (Note)

0 : Rising edge count

1 : Falling edge count

0 : Rising edge count

1 : Falling edge count

Nothing is arranged for this bit. This is a write

disabled bit. When this bit is read out, the

contents are “0”.

Note: In the mask option type P, these bits are not available because

CNTR1 function and INT3 function cannot be used.

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