Allwinner A20 - Page 257

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 257 / 812
Offset: 0x50
Register Name: PC_CFG2
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
100: Reserved 101: Reserved
110: Reserved 111: Reserved
1.19.4.22. PC CONFIGURE REGISTER 3
Offset: 0x54
Register Name: PC_CFG3
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:3
/
/
/
2:0
R/W
0
PC24_SELECT
000: Input 001: Output
010: NDQS 011: Reserved
100: Reserved 101: Reserved
110: Reserved 111: Reserved
1.19.4.23. PC DATA REGISTER
Offset: 0x58
Register Name: PC_DAT
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:24
/
/
/
23:0
R/W
0
PC_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.