Service manual
CD-C831W
– 42 –
IC2 VHiLC78622N-1: Servo/Signal Control (LC78622NE) (2/2)
47* SBSY Output Sub-code clock sync signal output terminal.
48* EFLG Output C1, C2, single, double correction monitor terminal.
49* PW Output Sub-code P, Q, R, S, T, U, and W output terminal.
50* SFSY Output Sub-code frame sync signal output terminal. Falling occurs when the sub-code is in standby state.
51 SBCK Input
Sub-code read clock input terminal. Schmidt input (When this terminal is not used, connect it to 0V.)
52* FSX Output 7.35 kHz sync signal (frequency-divided from crystal oscillation) output terminal.
53 WRQ Output Sub-code Q output standby output terminal.
54 RWC Input Read/Write control input terminal. Schmidt input.
55 SQOUT Output Sub-code Q output terminal.
56 COIN Input Command input terminal from microcomputer.
57 CQCK Input Command input taking-in clock or sub-code taking-out (from SQOUT) clock input terminal.
Schmidt input
58 RES Input LSI resetting input terminal. When power is turned on, once "L" is set.
59* TEST11 Output Output terminal for test. Use this terminal in open state (usually "L" output).
60* 16M Output 16.9344 MHz output terminal.
61 4.2M Output 4.2336 MHz output terminal.
62 TEST5 Input Input terminal for test. Pull-down resistor built-in. Be sure to connect this terminal to 0V.
63 CS Input Chip selection input terminal. Pull-down resistor built-in.
In noncontrol state connect this terminal to 0V.
64 TEST1 Input Input terminal for test. Pull-down resistor is not provided. Be sure to connect this terminal to 0V.
Note: The same potential must be supplied to the power terminals (VDD, VVDD, LVDD, RVDD, XVDD).
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Figure 42 BLOCK DIAGRAM OF IC
Pin
No.
FunctionTerminal Name Input/Output
DEFI
EFMIN
FSEQ
V/P
PW
SBCK
SBSY
SFSY
CS
WRQ
SQOUT
COIN
RWC
CQCK
HFL
TES
TOFF
JP-
JP+
RES
TGL
CONT1
PCCL
CONT2
CONT3
CONT4
CONT5
EMPH/CONT6
EFLG
16M
4.2M
XVss
FSX
XIN
XOUT
XV
DD
RVss
RV
DD
MUTER/CONT7
RCHO
LCHO
MUTEL/CONT8
LVss
LV
DD
DOUT
C2F
EFMO
VV
DD
VVss
PDO
I SET
FR
PCK
TAI
TST11
TEST1
TEST2
TEST3
TEST4
TEST5
V
DD
Vss
CLV+
CLV-
Slice level
control
VCO colck oscillation
clock control
2K x 8bit
RAM
RAM address
generator
Interpolation mute
Bilingual
Digital OUT
Digital
attenuator
X4 oversampling
digital filter
1bitDAC
L.P.F
XTAL system timing
generator
General-use port
Servo commander
µCOM
Interface
Subcode division
QCRC
CLV
Digital servo
Sync detection
EFM demodulation
Flag processing of C1/C2
error detection and correction