User guide

MAX3540
Complete Single-Conversion Television Tuner
_______________________________________________________________________________________ 9
BIT NAME BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
SHDN_MIX 7, 6 0
Mixer shutdown.
00 = mixer enabled
01, 10 = factory use only
11 = mixer disabled
SHDN_IF 5 0
IF shutdown.
0 = IF section enabled
1 = IF section disabled
SHDN_PD 4 0
IF OVLD shutdown.
0 = power detector enabled
1 = power detector disabled
SHDN_SYN 3 0
Frequency synthesizer shutdown.
0 = synthesizer enabled
1 = synthesizer disabled
RESERVED 2, 1, 0 000 Must be set to 000.
Table 8. Shutdown Register (Address: 0110
b
)
BIT NAME BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
TFS[7:0] 7–0 00000000* Programs series capacitor values in the tracking filter.
Table 9. Tracking-Filter Series Cap Register (Address: 0111
b
)
BIT NAME BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
FLD 7 0
Filter load bit. A 0 to 1 transition of this bit forces the loading of the
ROM table data readback register.
Reserved 6 0 Must be set to 0.
TFP[5:0] 5–0 000000* Programs parallel capacitor values in the tracking filter.
Table 10. Tracking-Filter Parallel Cap Register (Address: 1000
b
)
BIT NAME BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
Reserved 7–4 0000 Must be set to 0000.
TFA[3:0] 3–0 0000* Address bits of the ROM register to be read.
Table 11. Tracking-Filter ROM Address Register (Address: 1001
b
)
BIT NAME BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
Reserved 7–0 N/A Reserved. Do not program these bits during normal operation.
Table 12. Reserved Register (Address: 1010
b
)
* See the RF Tracking Filter section.