Sanyo AVM-2550S Training Manual page 56

PLL Data Format
(MSB)
BYTE
Address byte (ADB) 1 1
Divider byte 1 (DB1) 0 M9
Divider byte 2 (DB2) M2 M1
Control byte (CB) 1 CP
Band switch byte (BB) X X
A • • • • • • • • • • • • • acknowledge
MA1 and MA2 • • • • address selection bits (See Table 1)
M8~M0, S4~S0 • • • programmable divider bits: N = M8x2
CP • • • • • • • • • • • • charge pump current (tuning speed) switch control
T1 • • • • • • • • • • • • test mode selection
CD • • • • • • • • • • • • charge pump defeat switch control
X • • • • • • • • • • • • • don't care bit
BU • • • • • • • • • • • • UHF band switch control
FMT • • • • • • • • • • • FM trap (92.5MHz) switch control at channel 6 (See Table. 2)
BVH • • • • • • • • • • • VH band switch control
BVL • • • • • • • • • • • VL band switch control
(LSB) COMMAND
DATA BYTE
0 0 0 MA1 MA0 0
M8 M7 M6 M5 M4 M3
M0 S4 S3 S2 S1 S0
T1 CD X 1 1 0
X X BU FMT BVH BVL
+ . . . + S2x2
13
Table 1. Address Byte
Voltage applied to the Address
Input (ADSW) of Tuner
A
0 to 0.5V
A
A
A
Table 2. Band Switch Byte
A
BAND
VL (WITHOUT CH 06 ONLY)
+ S1x2 + S0
2
VL (CH 06 ONLY)
VH
UHF
– 53 –
MA1 MA2 Address
0 0 C0 h
BU FMT BVH
L L L
L H L
L L H
H L L
BVL
H
H
L
L