Allwinner A20 - Page 259

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 259 / 812
1.19.4.27. PC PULL REGISTER 1
Offset: 0x68
Register Name: PC_PULL1
Default Value: 0x0000_4016
Bit
Read/Write
Default
Description
31:18
/
/
/
[2i+1:2i]
(i=0~8)
R/W
0x0000_4016
PC_PULL
PC[n] Pull-up/down Select (n = 16~24)
00: Pull-up/down disable 01: Pull-up
10: Pull-down 11: Reserved
1.19.4.28. PD CONFIGURE REGISTER 0
Offset: 0x6C
Register Name: PD_CFG0
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31
/
/
/
30:28
R/W
0
PD7_SELECT
000: Input 001: Output
010: LCD0_D7 011: LVDS0_VNC
100: Reserved 101: Reserved
110: Reserved 111: Reserved
27
/
/
Reserved
26:24
R/W
0
PD6_SELECT
000: Input 001: Output
010: LCD0_D6 011: LVDS0_VPC
100: Reserved 101: Reserved
110: Reserved 111: Reserved
23
/
/
/
22:20
R/W
0
PD5_SELECT
000: Input 001: Output
010: LCD0_D5 011: LVDS0_VN2
100: Reserved 101: Reserved
110: Reserved 111: Reserved
19
/
/
/