cx25840 Conexant Systems, Inc., cx25840 Datasheet - Page 160

• Manufacturer Part Number: cx25840
• Description: Video Decoder And Broadcast Audio
• Manufacturer: Conexant Systems, Inc.

Register Map
5-18
[7]
[6]
[5]
[4]
[3]
[2]
[1]
[0]
[7]
[6]
[5]
[4]
[3]
[2]
[1]
AFE Control 2
AFE Control 3
[0]
Bits
Bits
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Type
Type
0
0
0
0
0
1
0
0
1
1
0
1
1
1
0
0
Default
Default
BYPASS_CH3
BYPASS_CH2
BYPASS_CH1
DROOP_COMP_CH3
DROOP_COMP_CH2
DROOP_COMP_CH1
CLAMP_EN_CH3
CLAMP_EN_CH1
AUD_IN_SEL
LUMA_IN_SEL
CHROMA_IN_SEL
CLAMP_SEL_CH3
CLAMP_SEL_CH2
CLAMP_SEL_CH1
VGA_SEL_CH3
CLAMP_EN_CH2
Name
Name
Conexant
Channel 1 clamping
0 = Disable
1 = Enable (power-up)
ADC input select for audio input paths:
0 = ADC1
1 = ADC2
ADC input select for luma input path
0 = ADC1
1 = ADC2
0 = ADC1
1 = ADC2
Clamp level select for CH3
0 = Video decoder drives clamp level
1 = Clamp level is fixed at 3'b111 (midcode clamp). Use for
chroma inputs.
Clamp level select for CH2
0 = Video decoder drives clamp level
1 = Clamp level is fixed at 3'b111 (midcode clamp). Use for
chroma inputs.
Clamp level select for CH1
0 = Video decoder drives clamp level
1 = Clamp level is fixed at 3'b111 (midcode clamp). Use for
chroma inputs.
VGA gain select for CH3
0 = Video decoder drives VGA gain setting
1 = Audio decoder drives VGA gain setting
ADC input select for chroma input path
Bypass CH3 anti-alias filter when set.
Bypass CH2 anti-alias filter when set.
Bypass CH1 anti-alias filter when set.
Enables resistance boosting in CH3 input
Enables resistance boosting in CH2 input
Enables resistance boosting in CH1 input
Enables (powers up) clamping for CH3
0 = Disable
1 = Enable
Enables (powers up) clamping for CH2
0 = Disable
1 = Enable
Description
Description
CX25840/1/2/3 Data Sheet
Address 0x105
Address 0x106
102284B
8/3/05