Allwinner A20 - Page 248

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 248 / 812
Offset: 0x28
Register Name: PB_CFG1
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
000: Input 001: Output
010: I2S_DO2 011: Reserved
100: Reserved 101: Reserved
110: Reserved 111: Reserved
7
/
/
/
6:4
R/W
0
PB9_SELECT
000: Input 001: Output
010: I2S_DO1 011: Reserved
100: Reserved 101: Reserved
110: Reserved 111: Reserved
3
/
/
/
2:0
R/W
0
PB8_SELECT
000: Input 001: Output
010: I2S_DO0 011: AC97_DO
100: Reserved 101: Reserved
110: Reserved 111: Reserved
1.19.4.12. PB CONFIGURE REGISTER 2
Offset: 0x2C
Register Name: PB_CFG2
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31
/
/
/
30:28
R/W
0
PB23_SELECT
000: Input 001: Output
010: UART0_RX 011: IR1_RX
100: Reserved 101: Reserved
110: Reserved 111: Reserved
27
/
/
/
26:24
R/W
0
PB22_SELECT
000: Input 001: Output
010: UART0_TX 011: IR1_TX