Allwinner A20 - Page 327

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Offset: 0xB0
Register Name: MP_ROPCTL_REG
Bit
Read/W
rite
Default/H
ex
Description
2: channel 2
3:reserved
Note: the bit is only valid in by-pass mode of Green channel
9:8
R/W
0
ROP_BLUEBYPASSSEL
ROP output Blue channel selection
0: channel 0
1: channel 1
2: channel 2
3:reserved
Note: the bit is only valid in by-pass mode of Blue channel
7
R/W
0
ROP_ALPHABYPASSEN
ROP Alpha channel by-pass enable control
0:pass through
1:by-pass
6
R/W
0
ROP_REDBYPASSEN
ROP Red channel by-pass enable control
0:pass through
1:by-pass
5
R/W
0
ROP_GREENBYPASSEN
ROP Green channel by-pass enable control
0:pass through
1:by-pass
4
R/W
0
ROP_BLUEBYPASSEN
ROP Blue channel by-pass enable control
0:pass through
1:by-pass
3:1
/
/
/
0
R/W
0
ROP_MOD
ROP type selection
0:ROP3
1:ROP4
----In ROP3 mode, only the value of ‘channel 3 index 0 control