cx25840 Conexant Systems, Inc., cx25840 Datasheet - Page 182

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

Register Map
5-40
AFE Diagnostic Control 5
[7:4]
[3]
[2]
[1]
[0]
AFE Diagnostic Control 6
[7]
[6:5]
[4:0]
AFE Diagnostic Control 7
[7:6]
[5]
[4:0]
Bits
Bits
Bits
RZ
RW
RW
RW
RW
RW
RZ
RW
RZ
RO
RO
Type
Type
Type
0000
0
0
0
0
0
00
00000
00
Default
Default
Default
RESERVED
TEST_MODE_CH1
DISCONNECT_CH1
CH_SEL_ADC1
TUNE_FIL_RST
FORCE_TUNING
RESERVED
TUNE_IN[4:0]
RESERVED
TUNING_READY
TUNE_OUT
Name
Name
Name
Conexant
Connects the differential analog signal at ADC1 input to pins
VIN2 and VIN3.
0 = Do not connect
1 = Connect
0 = Enable filter
1 = Disable filter
ADC1 test mode
0 = Connects ADC1 to output of filter.
1 = Connects ADC1 to the output of first VGA stage.
Reset filter tuning logic. When 1, filter tuning is reset. When set
back to 0, filter will auto-tune itself, and after a few clocks, return
to normal operation.
0 = Do not override
1 = Forces tuning code to value contained in TUNE_IN field.
Tuning code to be used when FORCE_TUNING is set. Overrides
the value chosen by auto tuning.
Filter auto tuning status
0 = Not complete
1 = Filter tuning complete
The tuning code selected by the auto-tune algorithm.
Disables the filter in CH1 test mode.
Auto tuning code override
Description
Description
Description
CX25840/1/2/3 Data Sheet
Address 0x13C
Address 0x13D
Address 0x13E
102284B
8/3/05