Sony CDC-X237, Руководство по обслуживанию, Страница: 13 / 42

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CDC-X237/X437
3-1. IC PIN DESCRIPTIONS
• IC202 LC78622NE (DIGITAL SIGNAL PROCESSOR) (SERVO BOARD)
Pin No. Pin Name I/O Pin Description
1 DEFI I Defect detection signal (DEF) input (Must be connected to 0 V when unused.)
2 TAI I Test input pin A pull-down resister is built-in. Must be connected to 0 V.
3 PDO O External VCO control phase comparator output
4 VVSS — Internal VCO ground pin Must be connected to 0 V.
5 ISET — PDO output current adjustment resister connection pin
6 VVDD — Internal VCO power supply pin
7 FR — VCO frequency range adjustment
8 VSS — Digital system ground pin Must be connected to 0 V.
9 EFMO O EFM signal output
10 EFMIN I EFM signal input
11 TEST2 I Test input pin A pull-down resister is built-in. Must be connected to 0 V.
12 CLV+ O Disc motor control signal output
13 CLV– O Can be set to three-value output by microprocessor command.
14 V/P O
Rough servo/phase control automatic switching monitor output
Outputs a high level during rough servo a low level.
15 HFL I Track detection signal input This is a schmitt input.
16 TES I Tracking error signal input This is a schmitt input.
17 TOFF O Tracking off signal output
18 TGL O Tracking gain switching signal output Increase the gain when low.
19 JP+ O Track jump control signal output
20 JP– O Three-value output is also possible when specified by microprocessor command.
21 PCK O
EFM data playback clock monitor signal output
Output pin 4.3218 MHz when the phase is locked. Not used. (Open)
Synchronization signal detection signal output
22 FSEQ O Output a high level when the Synchronization signal detected from the EFM signal
and the internaly generated synchronization signal range. Not used. (Open)
23 VDD — Digital system power supply pin
24 CONT1 I/O General-purpose input/output 1 – 5
25 CONT2 I/O Controlled by serial data commands from the microprocessor.
26 CONT3 I/O Any of these that are unused must be either set up as input pin ports and connected to
27 CONT4 I/O 0 V, or set up as output pin ports and left open.
28 CONT5 I/O Not used. (Open)
De-emphasis monitor signal output
29 EMPH O A high level indicates playback of a de-emphasis disc.
General-purpose input/output pin 6. Not used. (Open)
30 C2F O C2 flag output pin Not used. (Open)
31 DOUT O Digital out signal output (EIJA format) Not used. (Open)
32 TEST3 I Test input pin A pull-down resister is built-in. Must be connected to 0 V.
33 TEST4 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
34 PCCL I similar to those of LC78622E.
H: Control possible only for the general-purpose input/output port command.
L: Control possible for all commands.
35 LMUTE O Left channel mute signal output General-purpose input/output pin 7
36 LVDD — Left channel power supply pin
37 LOUT O Left channel output
38 LVSS — Left channel ground pin Must be connected to 0 V.
39 RVSS — Right channel ground pin Must be connected to 0 V.
40 ROUT O Right channel output
41 RVDD — Right channel power supply pin
SECTION 3
DIAGRAMS