
ISDB-T 1-Segment Tuner
Table 12. STATUS Register (Read Only)
BIT NAME
X
ADC[2:0]
VCP[1:0]
PWR
BIT LOCATION
(0 = LSB)
7, 6
5, 4, 3
2, 1
0
DEFAULT
1,1
—
—
1
FUNCTION
Unused
Indicates the 3-bit ADC conversion of the VCO tuning voltage (VTUNE).
Reflects the charge-pump current setting, when CPS = 1.
Logic-high indicates power has been cycled. STATUS register read operation
resets PWR to 0.
Table 13. VAS STATUS Register (Read Only)
BIT NAME
VVCO[1:0]
VVSB[3:0]
BIT LOCATION
(0 = LSB)
7, 6
5, 4, 3, 2
DEFAULT
—
—
FUNCTION
Indicates which VCO has been selected by the VCO autoselect state machine. See
Table 5 for VCO[1:0] definition.
Indicates which sub-band of a particular VCO has been selected by either the VCO
autoselect state machine. See Table 5 for VSB[2:0] definition.
Indicates whether VCO autoselection was successful.
VASA
1
—
0 = Indicates the autoselect function is disabled or unsuccessful VCO selection.
1 = Indicates successful VCO autoselection.
Status indicator for the VCO autoselect function.
VASE
0
—
0 = Indicates the VCO autoselect function is active.
1 = Indicates the VCO autoselect function is inactive.
Table 14. Factory Use Only Registers (0B, 0C, 0D, 0E, 0F, 10 and 11)
BIT NAME
X
BIT LOCATION
(0 = LSB)
7, 6, 5, 4, 3,
2, 1, 0
DEFAULT
00000000
FUNCTION
Factory use only. Must be programmed to 0 upon power-up.
16
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