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Complete Single-Conversion
Television Tuner
Table 6. IFOVLD, Charge Pump, and Filter Select Register (Address: 0100 b )
BIT NAME
RESERVED
IFOVLD[2:0]
BIT LOCATION (0 = LSB)
7
6-4
RECOMMENDED
DEFAULT
0
000
FUNCTION
Must be set to 0.
Write content of ROM register OD[2:0] to this location.
Selects the typical charge-pump current.
00 = 0.5mA
CP[1:0]
3-2
00
01 = 1mA
10 = 1.5mA
11 = 2mA
Selects the tracking filter band of operation.
TF
1
0
0 = VHF
1 = UHF
RESERVED
0
0
Must be set to 0.
Table 7. Control Register (Address: 0101 b )
BIT NAME
RESERVED
BIT LOCATION (0 = LSB)
7-4
RECOMMENDED
DEFAULT
0000
Must be set to 0000.
FUNCTION
RF shutdown.
SHDN_RF
3
0
0 = RF circuitry enabled
1 = RF circuitry disabled
IF VGA shutdown.
SHDN_IFVGA
2
0
0 = IF VGA enabled
1 = IF VGA disabled
Selects the RF input.
00 = Selects VHF_IN, LPF enabled
INPT[1:0]
1-0
01
01 = Selects VHF_IN, LPF disabled
10 = Selects UHF_IN
11 = Factory use only
Table 8. Shutdown Register (Address: 0110 b )
BIT NAME
BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
Mixer shutdown.
SHDN_MIX
7-6
00
00 = Mixer enabled
01,10 = Factory use only
11 = Mixer disabled
IF shutdown.
SHDN_IF
5
0
0 = IF section enabled
1 = IF section disabled
IFOVLD shutdown.
SHDN_OD
4
0
0 = Power detector enabled
1 = Power detector disabled
Frequency synthesizer shutdown.
SHDN_SYN
3
0
0 = Synthesizer enabled
1 = Synthesizer disabled
RESERVED
2-0
000
Must be set to 000.
12
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