
Complete Single-Conversion
Television Tuner
Table 3. N-DIV Low Register (Address: 0001 b )
BIT NAME
N[7:0]
BIT LOCATION (0 = LSB)
7-0
RECOMMENDED
DEFAULT
10101011
FUNCTION
Sets the least significant bits of the PLL integer divider (N). Default
integer divider value is N = 4688. N can range from 256 to 32,767.
Table 4. R-DIV Register (Address: 0010 b )
BIT NAME
RESERVED
R[6:0]
BIT LOCATION (0 = LSB)
7
6-0
RECOMMENDED
DEFAULT
0
0010000
FUNCTION
Must be set to 0.
Sets the PLL reference divider (R). Default reference divider value is
R = 64. R can range from 16 to 127.
Table 5. VCO Register (Address: 0011 b )
BIT NAME
BIT LOCATION (0 = LSB)
RECOMMENDED
DEFAULT
FUNCTION
VCO select. Selects one of three possible VCOs.
00 = VCOs shut down
VCO[4:3]
7-6
10
01 = Selects VCO1
10 = Selects VCO2
11 = Selects VCO3
VCO sub-band select. Selects one of eight possible VCO sub-bands.
000 = Selects SB0
001 = Selects SB1
010 = Selects SB2
VCO[2:0]
5-3
111
011 = Selects SB3
100 = Selects SB4
101 = Selects SB5
110 = Selects SB6
111 = Selects SB7
Lock detect enable.
LD
2
1
0 = Disabled
1 = Enabled
VCO divider ratio select.
00 = Sets VCO divider to 4
VDIV[1:0]
1-0
10
01 = Sets VCO divider to 8
10 = Sets VCO divider to 16
11 = Sets VCO divider to 32
______________________________________________________________________________________
11