Allwinner A20 - Page 245

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 245 / 812
1.19.4.9. PA PULL REGISTER 1
Offset: 0x20
Register Name: PA_PULL1
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:4
/
/
/
[2i+1:2i]
(i=0~1)
R/W
0x0
PA_PULL
PA[n] Pull-up/down Select (n = 16~17)
00: Pull-up/down disable 01: Pull-up enable
10: Pull-down 11: Reserved
1.19.4.10. PB CONFIGURE REGISTER 0
Offset: 0x24
Register Name: PB_CFG0
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31
/
/
/
30:28
R/W
0
PB7_SELECT
000: Input 001: Output
010: I2S_LRCK 011: AC97_SYNC
100: Reserved 101: Reserved
110: Reserved 111: Reserved
27
/
/
/
26:24
R/W
0
PB6_SELECT
000: Input 001: Output
010: I2S_BCLK 011: AC97_BCLK
100: Reserved 101: Reserved
110: Reserved 111: Reserved
23
/
/
/
22:20
R/W
0
PB5_SELECT
000: Input 001: Output
010: I2S_MCLK 011: AC97_MCLK
100: Reserved 101: Reserved
110: Reserved 111: Reserved
19
/
/
/