Panasonic MN101C77C - Manual (Page 138)

Chapter 3 Interrupts
III - 44 External Interrupts
■ Noise Filter Control Register 1 (NFCTR1)
The noise filter control register (NFCTR1) sets the noise remove function for IRQ2 to IRQ4.
Figure 3-3-5 Noise Filter Control Register 1 (NFCTR1 : x'03F8D', R/W)
0 1 2 4 5 6 7 3
( At reset : - - - - - 0 0 0) NFCTR1 NF2EN NF3EN NF4EN - - - - -
0
1
Noise filter OFF
IRQ2/ noise filter setup
Noise filter ON
NF2EN
0
1
Noise filter OFF
IRQ3/noise filter setup
IRQ4/noise filter setup
Noise filter ON
Noise filter OFF
Noise filter ON
* Sampling cycle is fosc only.
NF3EN
0
1
NF4EN