MAX3544 Просмотр технического описания (PDF) - Maxim Integrated

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MAX3544

Multiband Digital Television Tuner

Maxim Integrated 

Multiband Digital Television Tuner

Table 21. R11: VAS STATUS Register—VCO Autoselect Status (Address: 11h)

BIT NAME

BIT LOCATION

(0 = LSB)

TYPICAL

SETTING

FUNCTION

VVCO[1:0]

7:6

Indicates which VCO has been selected by either the autoselect state machine or

N/A

by manual selection when the VSA state machine is disabled. See the R00 descrip-

tion for the VCO[1:0] definition.

VVSB[3:0]

5:2

Indicates which sub-band of a particular VCO has been selected by either the

N/A

autoselect state machine or by manual selection when the VSA state machine is

disabled. See the R00 description for the VSUB[3:0] definition.

VASA

1

Indicates whether VCO autoselection was successful.

N/A

0 = Indicates the autoselect function is disabled or unsuccessful VCO selection

1 = Indicates successful VCO autoselection

VASE

0

Status indicator for the autoselect function.

N/A

0 = Indicates the autoselect function is active

1 = Indicates the autoselect process is inactive

Note: Not production tested or guaranteed functional.

Table 22. R12: GEN STATUS Register—General Status (Address: 12h)

BIT NAME

EMPTY

VCP

TRIM

POR

BIT LOCATION

(0 = LSB)

7:6

5

4

3

VCOADC

[2:0]

2:0

TYPICAL

SETTING

N/A

N/A

N/A

N/A

N/A

FUNCTION

Empty

Maxim use only

Maxim use only

Maxim use only

VCO tuning voltage indicators.

000 = PLL not in lock, tune to the next lowest sub-band

001 to 110 = PLL in lock

111 = PLL not in lock, tune to the next higher sub-band

Note: Not production tested or guaranteed functional.

Table 23. R13: BIAS ADJ Register—Bias Adjustments (Address: 13h)

BIT NAME

EMPTY

BIT LOCATION

(0 = LSB)

7

TYPICAL

SETTING

0

MIXGM

6

1

FUNCTION

Empty

Mixer gain setting. Set to 1 for nominal gain. Set to 0 for approximately 2dB

reduced gain.

LNA2B[1:0]

5:4

LNA bias.

00 = Unused

01

01 = Nominal setting

10 = Unused

11 = Highest linearity setting

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