Rainbow Electronics MAX3541 - Manual (Page 13)

MAX3541
Complete Single-Conversion
Television Tuner
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BIT NAME BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
TFS[7:0] 7-0 00001111* Programs series capacitor values in the tracking filter.
Table 9. Tracking Filter Series Capacitor Register (Address: 0111
b
)
*See the RF Tracking Filter section.
BIT NAME BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
TFR[7:0] 7-0 00000000* Tracking filter data bits read from the device’s ROM table.
Table 13. ROM Table Data Readback Register (Address: 1011
b
)
*See the RF Tracking Filter section.
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.
*See the RF Tracking Filter section.
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 001001* Programs parallel capacitor values in the tracking filter.
Table 10. Tracking Filter Parallel Capacitor 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
POR 7 N/A
Power-on reset.
0 = Status register has been read
1 = Power reset since last status register read
LD[2:0] 6-4 N/A
VCO tuning voltage indicators.
000 = PLL not in lock, tune to the next lowest sub-band
001–110 = PLL in lock
111 = PLL not in lock, tune to the next higher sub-band
RESERVED 3-0 N/A Reserved.
Table 14. Status Register (Address: 1100
b
)