MAX3540(2007) データシートの表示（PDF） - Maxim Integrated
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MAX3540 Datasheet PDF : 16 Pages
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Complete Single-Conversion Television Tuner
Table 6. RSSI, Charge Pump, and Filter Select Register (Address: 0100b)
BIT NAME BIT LOCATION (0 = LSB) RECOMMENDED
DEFAULT
FUNCTION
RESERVED
7
0
Must be set to 0.
IFOVLD[2:0]
6, 5, 4
000
Write content of ROM register OD[2:0] to this location.
CP[1:0]
3, 2
Selects the typical charge-pump current.
00 = 0.5mA
00
01 = 1mA
10 = 1.5mA
11 = 2mA
TF[1:0]
1, 0
Selects the tracking filter band of operation.
00 = VHF low
00
01 = VHF high
10 = UHF
11 = factory use only
Table 7. Control Register (Address: 0101b)
BIT NAME
BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
RESERVED
7–4
SHDN_RF
3
SHDN_IFV
GA
2
0000
0
1
Must be set to 0000.
RF shutdown.
0 = RF circuitry enabled
1 = RF circuitry disabled
IF VGA shutdown.
0 = IF VGA enabled
1 = IF VGA disabled
INPT[1:0]
1, 0
Selects the RF input.
00 = selects VHF_IN with LPF
00
01 = selects VHF_IN, no LPF
10 = selects UHF_IN
11 = factory use only
8 _______________________________________________________________________________________
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