Allwinner A20 - Page 271

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 271 / 812
Bit
Read/Write
Default
Description
31:24
/
/
/
[2i+1:2i]
(i=0~11)
R/W
0x0
PE_PULL
PE[n] Pull-up/down Select (n = 0~11)
00: Pull-up/down disable 01: Pull-up
10: Pull-down 11: Reserved
1.19.4.45. PE PULL REGISTER 1
Offset: 0xB0
Register Name: PE_PULL1
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:0
/
/
/
1.19.4.46. PF CONFIGURE REGISTER 0
Offset: 0xB4
Register Name: PF_CFG0
Default Value: 0x0040_4044
Bit
Read/Write
Default
Description
31:23
/
/
/
22:20
R/W
0x4
PF5_SELECT
000: Input 001: Output
010: SDC0_D2 011: Reserved
100: JTAG_CK1 101: Reserved
110: Reserved 111: Reserved
19
/
/
/
18:16
R/W
0
PF4_SELECT
000: Input 001: Output
010: SDC0_D3 011: Reserved
100: UART0_RX 101: Reserved
110: Reserved 111: Reserved
15
/
/
/
14:12
R/W
0x4
PF3_SELECT
000: Input 001: Output