Datasheet

Multiband Analog and
Digital Television Tuner
MAX3543
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Table 21. R11: VAS STATUS Register—VCO Autoselect Status (Address: 11h)
Table 22. R12: GEN STATUS Register—General Status (Address: 12h)
Table 23. R13: BIAS ADJ Register—Bias Adjustments (Address: 13h)
Note: Not production tested or guaranteed functional.
Note: Not production tested or guaranteed functional.
Note: Only production tested and guaranteed functional in state 0XX1 X11X, where X can be either 0 or 1. All other states are
untested and may not function correctly. Contact Maxim if untested settings will be used in production.
BIT NAME
BIT LOCATION
(0 = LSB)
TYPICAL
SETTING
FUNCTION
VVCO[1:0] 7:6 N/A
Indicates which VCO has been selected by either the autoselect state machine
or by manual selection when the VSA state machine is disabled. See the R00
description for the VCO[1:0] definition.
VVSB[3:0] 5:2 N/A
Indicates which sub-band of a particular VCO has been selected by either the
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 N/A
Indicates whether VCO autoselection was successful.
0 = Indicates the autoselect function is disabled or unsuccessful VCO selection
1 = Indicates successful VCO autoselection
VASE 0 N/A
Status indicator for the autoselect function.
0 = Indicates the autoselect function is active
1 = Indicates the autoselect process is inactive
BIT NAME
BIT LOCATION
(0 = LSB)
TYPICAL
SETTING
FUNCTION
EMPTY 7:6 N/A Empty
VCP 5 N/A Maxim use only
TRIM 4 N/A Maxim use only
POR 3 N/A Maxim use only
VCOADC
[2:0]
2:0 N/A
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
BIT NAME
BIT LOCATION
(0 = LSB)
TYPICAL
SETTING
FUNCTION
EMPTY 7 0 Empty
MIXGM 6 1 Mixer gain setting. Set to 0 for ATV mode. Set to 1 for DTV mode.
LNA2B[1:0] 5:4 01
LNA bias.
00 = Unused
01 = Nominal setting. Use for all standards except SECAM L/L’.
10 = Unused
11 = Highest linearity setting. Use for SECAM L/L’.
MIXB[1:0] 3:2 01
Mixer bias.
00 = Unused
01 = Nominal setting. Use for all standards except SECAM L/L’.
10 = Unused
11 = Highest linearity setting. Use for SECAM L/L’.
FILTB 1 1 Must set to 1 for proper operation
IFVGAB 0 0
IF VGA bias.
0 = Default
1 = Highest current (approximately nominal + 6mA)