Allwinner A20 - Page 423

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 423 / 812
Offset: 0x088
Register Name: TCON0_IO_POL_REG
Bit
Read/
Write
Default/
Hex
Description
27
R/W
0
IO3_Inv
0: not invert
1: invert
26
R/W
0
IO2_ Inv
0: not invert
1: invert
25
R/W
0
IO1_Inv
0: not invert
1: invert
24
R/W
0
IO0_Inv
0: not invert
1: invert
23:0
R/W
0
Data_Inv
TCON0 output port D[23:0] polarity control, with independent bit
control:
0s: normal polarity
1s: invert the specify output
5.1.4.22. TCON0 IO CONTROL REGISTER
Offset: 0x08C
Register Name: TCON0_IO_TRI_REG
Bit
Read/
Write
Default/H
ex
Description
31:28
/
/
/
27
R/W
1
IO3_Output_Tri_En
1: disable
0: enable
26
R/W
1
IO2_Output_Tri_En
1: disable
0: enable
25
R/W
1
IO1_Output_Tri_En
1: disable
0: enable