Allwinner A20 - Page 250

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 250 / 812
Offset: 0x2C
Register Name: PB_CFG2
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
2:0
R/W
0
PB16_SELECT
000: Input 001: Output
010: SPI2_MOSI 011: JTAG_DO0
100: Reserved 101: Reserved
110: Reserved 111: Reserved
1.19.4.13. PB CONFIGURE REGISTER 3
Offset: 0x30
Register Name: PB_CFG3
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:0
/
/
/
1.19.4.14. PB DATA REGISTER
Offset: 0x34
Register Name: PB_DAT
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:24
/
/
/
23:0
R/W
0
PB_DAT
If the port is configured as input, the corresponding bit is the
pin state. If the port is configured as output, the pin state is the
same as the corresponding bit. The read bit value is the value
setup by software. If the port is configured as functional pin,
the undefined value will be read.
1.19.4.15. PB MULTI-DRIVING REGISTER 0
Offset: 0x38
Register Name: PB_DRV0
Default Value: 0x5555_5555