Direct-Conversion TV Tuner

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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.