Noise Filter Function; Noise Filter Function List; Noise Filter Block Diagram - Panasonic MN103S User Manual

Chapter 5
Interrupt Controller

5.4 Noise Filter Function

This LSI incorporates noise filters for external interrupt pins. The noise filter control register can be used to select
whether to enable or disable noise filters and sampling frequency. The sampling frequency can be selected from
1/4, 1/8, 1/16, and 1/32 of IOCLK.
5.4.1

Noise Filter Function List

Table:5.4.1 Noise Filter Function List
Operation condition
Noise filter
Sampling frequency
5.4.2

Noise Filter Block Diagram

Noise Filter Block Diagram
IRQ00 to 08 pins
IOCLK
V - 40 Noise Filter Function
Description
enable/disable
IOCLK x 1/4
IOCLK x 1/8
IOCLK x 1/16
IOCLK x 1/32
Sampling clock selection
1/4
Frequency
divider 1/8
1/16
IOCLK
1/32
Noise filter control register
Figure:5.4.1 Noise Filter Block Diagram
Counter
MPX
Noise filter enable/disable
M
IRQ block
P
X
Edge detection register