Diagrams; Ic Pin Descriptions; Connections - Sony CDC-X437 Service Manual

3-1. IC PIN DESCRIPTIONS

• IC202 LC78622NE (DIGITAL SIGNAL PROCESSOR) (SERVO BOARD)
Pin No. Pin Name
1 DEFI
2 TAI
3 PDO
4 VVSS
5 ISET
6 VVDD
7 FR
8 VSS
9 EFMO
10 EFMIN
11 TEST2
12 CLV+
13 CLV–
14 V/P
15 HFL
16 TES
17 TOFF
18 TGL
19 JP+
20 JP–
21 PCK
22 FSEQ
23 VDD
24 CONT1
25 CONT2
26 CONT3
27 CONT4
28 CONT5
29 EMPH
30 C2F
31 DOUT
32 TEST3
33 TEST4
34 PCCL
35 LMUTE
36 LVDD
37 LOUT
38 LVSS
39 RVSS
40 ROUT
41 RVDD
SECTION 3

DIAGRAMS

I/O
I Defect detection signal (DEF) input (Must be connected to 0 V when unused.)
I Test input pin A pull-down resister is built-in. Must be connected to 0 V.
O External VCO control phase comparator output
— Internal VCO ground pin Must be connected to 0 V.
— PDO output current adjustment resister connection pin
— Internal VCO power supply pin
— VCO frequency range adjustment
— Digital system ground pin Must be connected to 0 V.
O EFM signal output
I EFM signal input
I Test input pin A pull-down resister is built-in. Must be connected to 0 V.
O Disc motor control signal output
O Can be set to three-value output by microprocessor command.
Rough servo/phase control automatic switching monitor output
O
Outputs a high level during rough servo a low level.
I Track detection signal input This is a schmitt input.
I Tracking error signal input This is a schmitt input.
O Tracking off signal output
O Tracking gain switching signal output Increase the gain when low.
O Track jump control signal output
O Three-value output is also possible when specified by microprocessor command.
EFM data playback clock monitor signal output
O
Output pin 4.3218 MHz when the phase is locked. Not used. (Open)
Synchronization signal detection signal output
O Output a high level when the Synchronization signal detected from the EFM signal
and the internaly generated synchronization signal range. Not used. (Open)
— Digital system power supply pin
I/O General-purpose input/output 1 – 5
I/O Controlled by serial data commands from the microprocessor.
I/O Any of these that are unused must be either set up as input pin ports and connected to
I/O 0 V, or set up as output pin ports and left open.
I/O Not used. (Open)
De-emphasis monitor signal output
O A high level indicates playback of a de-emphasis disc.
General-purpose input/output pin 6. Not used. (Open)
O C2 flag output pin Not used. (Open)
O Digital out signal output (EIJA format) Not used. (Open)
I Test input pin A pull-down resister is built-in. Must be connected to 0 V.
I Test input pin A pull-down resister is built-in. Must be connected to 0 V.
General-purpose input/output command identifying pin
A pull-down resister is built-in. Must be connected to 0 V when used with functions
I similar to those of LC78622E.
H: Control possible only for the general-purpose input/output port command.
L: Control possible for all commands.
O Left channel mute signal output General-purpose input/output pin 7
— Left channel power supply pin
O Left channel output
— Left channel ground pin Must be connected to 0 V.
— Right channel ground pin Must be connected to 0 V.
O Right channel output
— Right channel power supply pin
CDC-X237/X437
Pin Description
13