Allwinner A20 - Page 296

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 296 / 812
Offset: 0x214
Register Name: PIO_INT_STATUS
Default Value: 0x0000_0000
Bit
Read/Writ
e
Default
Description
[n]
(n=0~21)
R/W
0
PIO_INT_STATUS
External INTn Pending Bit (n = 0~21)
0: No IRQ pending
1: IRQ pending
Write ‘1’ to clear
1.19.4.87. PIO INTERRUPT DEBOUNCE REGISTER
Offset: 0x218
Register Name: PIO_INT_DEB
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:7
/
/
/
6:4
R/W
0
DEB_CLK_PRE_SCALE
Debounce Clock Pre-scale n
The selected clock source is prescaled by 2^n.
3:1
/
/
/
0
R/W
0
PIO_INT_CLK_SELECT
PIO Interrupt Clock Select
0: LOSC 32Khz
1: HOSC 24Mhz