Allwinner A20 - Page 252

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 252 / 812
Offset: 0x44
Register Name: PB_PULL1
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:16
/
/
/
[2i+1:2i]
(i=0~7)
R/W
0x0
PB_PULL
PB[n] Pull-up/down Select (n = 16~23)
00: Pull-up/down disable 01: Pull-up enable
10: Pull-down 11: Reserved
1.19.4.19. PC CONFIGURE REGISTER 0
Offset: 0x48
Register Name: PC_CFG0
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31
/
/
/
30:28
R/W
0
PC7_SELECT
000: Input 001: Output
010: NRB1 011: SDC2_CLK
100: Reserved 101: Reserved
110: Reserved 111: Reserved
27
/
/
/
26:24
R/W
0
PC6_SELECT
000: Input 001: Output
010: NRB0 011: SDC2_CMD
100: Reserved 101: Reserved
110: Reserved 111: Reserved
23
/
/
/
22:20
R/W
0
PC5_SELECT
000: Input 001: Output
010: NRE# 011: Reserved
100: Reserved 101: Reserved
110: Reserved 111: Reserved
19
/
/
/
18:16
R/W
0
PC4_SELECT
000: Input 001: Output