Manual

MAX3580
Direct-Conversion TV Tuner
______________________________________________________________________________________ 15
DC Offset DAC (Register Address 0x0C)
DC_DAC<7:0>: Value to Program to I/Q DC Offset
DAC. Note that the MSB is located in the previous register.
Tracking Filter ROM Address
(Register Address 0x0D)
TFA<3:0>: Tracking Filter ROM Address. See Table 3.
Tracking Filter Write Data (Register Address 0x0E)
TFD<7:0>: Tracking Filter Data for ROM
Tracking Filter ROM Read Back (Read Only)
(Register Address 0x10)
TFR<7:0>: Tracking Filter ROM Data Read Back
Status (Read Only, for Factory Use Only)
(Register Address 0x11)
POR: Power-On Reset
0 = Power has not been reset since the last read.
1 = Power has been reset since the last read. Gets
reset after reading back address 8’h0C.
VASA, VASE: VCO Autotuner Status*
LD: PLL Lock Detector
0 = PLL unlocked
1 = PLL locked
DC_HI: DC Offset Correction Detected Positive Signal
Excursion in Either I or Q Channel*
DC_LO: DC Offset Correction Detected Negative Signal
Excursions in Either I or Q Channel*
PD_OVLD: Baseband Power Detector
0 = Baseband signal below threshold
1 = Baseband signal above threshold
Autotuner Read Back (Read Only, for Factory Use
Only) (Register Address 0x12)
VCOA<1:0> VCO Tank Selected by Autotuner*
BSA<1:0> Sub-Band VCO Selected by Autotuner*
ADC<2:0> VCO Tank Voltage ADC*
Table 3. MAX3580 Fuse Table
BYTE 7 6543 2 1 0 DESCRIPTION
00 Unused Bias Bias trim
01 VHF (200MHz) parallel cap VHF (200MHz) series cap VHF high series cap
02 Unused VHF (200MHz) shunt cap VHF shunt cap
03 UHF low (470MHz) parallel cap UHF low (470MHz) series cap UHF low series cap low
04 UHF high (860MHz) shunt cap UHF low (470MHz) shunt cap UHFhigh/low parallel cap
05 UHF high (860MHz) parallel cap UHF high (860MHz) series cap UHF high series cap
06 Baseband filter UHF (8MHz) coefficient. Baseband filter VHF (7MHz) coefficient. BB filter bandwidth
07 X X X X X X X RO Read only
* Not production tested.