CXA3235 Sony Corporation, CXA3235 Datasheet - Page 12

• Manufacturer Part Number: CXA3235
• Description: All Band TV Tuner IC with On-chip PLL
• Manufacturer: Sony Corporation

3) Programming
3-1) The CXA3235N control format is as follows.
3-1-1 :
Write-mode :
X : Don’t care
3-1-2 :
Write-mode :
X : Don’t care
M9 is “0” for B-1 mode.
The VCO lock frequency is obtained according to the following formula.
fosc = fref
The variable frequency division ranges of M and S are as follows, and are set as binary.
Band SW byte
Band SW byte
Divider byte 1
Divider byte 2
Divider byte 1
Divider byte 2
Address byte
Address byte
Control byte
Control byte
fosc : local oscillator frequency
fref : reference frequency
8
M
S
32 ≤ M ≤ 1023 (32 ≤ M ≤ 511 for B-1 mode)
0 ≤ S ≤ 31
B-0/B-1/B-2/B-3 Modes
B-4 Mode
MODE
MODE
: prescaler fixed frequency division ratio
: main divider frequency division ratio
: swallow counter frequency division ratio
Slave Receiver
Slave Receiver
8
(32 M + S)
MSB
MSB
bit7
bit7
M2
M2
X
X
1
0
1
1
0
1
M9
bit6
bit6
M1
CP
M9
M1
CP
X
X
1
1
bit5
bit5
M8
M0
M8
M0
T1
T1
X
X
0
0
—12—
bit4
bit4
CD
CD
M7
M7
S4
S4
X
X
0
0
bit3
bit3
M6
BU
M6
BU
S3
S3
X
X
0
0
MA1
FMT
MA1
FMT
bit2
bit2
M5
M5
S2
S2
R1
X
MA0
BVH
MA0
BVH
bit1
bit1
M4
M4
R0
S1
S1
X
LSB
BVL
LSB
BVL
bit0
bit0
OS
OS
M3
M3
S0
S0
0
0
CXA3235/3236N
A
A
A
A
A
A
A
A
A
A