Datasheet

Complete, Direct-Conversion
Tuner for DVB-S2 Applications
Table 13. Test Register
BIT NAME BIT LOCATION (0 = LSB) DEFAULT FUNCTION
CPTST[2:0] 7–5 000
Charge-pump test modes.
000 = Normal operation (default).
X 4 X Don’t care.
TURBO 3 0
Charge-pump fast lock.
Users must program to 1 after powering up the device.
LDMUX[2:0] 2–0 000
REFOUT output.
000 = Normal operation. Other values are not tested.
Table 14. Status Byte-1 Register
BIT NAME BIT LOCATION (0 = LSB) FUNCTION
POR 7
Power-on reset status.
0 = Chip status register has been read with a stop condition since last power-on.
1 = Power-on reset (power cycle) has occurred. Default values have been loaded in
registers.
VASA 6
Indicates whether VCO autoselection was successful.
0 = Indicates the autoselect function is disabled or unsuccessful VCO selection.
1 = Indicates successful VCO autoselection.
VASE 5
Status indicator for the autoselect function.
0 = Indicates the autoselect function is active.
1 = Indicates the autoselect process is inactive.
LD 4
PLL lock detector. TURBO bit must be programmed to 1 for valid LD reading.
0 = Unlocked.
1 = Locked.
X 3:0 Don’t care.
Table 15. Status Byte-2 Register
BIT NAME BIT LOCATION (0 = LSB) FUNCTION
VCOSBR[4:0] 7-3 VCO band readback.
ADC[2:0] 2-0
VAS ADC output readback.
000 = Out of lock.
001 = Locked.
010 = VAS locked.
101 = VAS locked.
110 = Locked.
111 = Out of lock.
MAX2112
Maxim Integrated
13