Sanyo MCD-ZX700F Service Manual page 10

IC BLOCK DIAGRAM & DESCRIPTION
IC902 LC78622E(Degital Signal Processor)
Terminal
Terminal
I/O
symbols
No.
1 DEFI I
Input terminal for defect detection signals (DEF). (Ground when not used.)
2 TAI I
3 PDO O
4 VVSS - For PLL
5 ISET AI
6 VVDD -
7 FR AI
8 VSS -
Ground terminal for digital signals. Make sure to ground.
9 EFMO O
For slice level
control
10 EFMIN I
11 TEST2 I
Input terminal for test. Pull-down resistor incorporated. Make sure to ground.
12 CLV+ O
Output for disk motor control. 3 values can be output by a command.
13 CLV- O
Output terminal for automatic switching monitor between rough servo and phase control. (Rough servo on "H"positio
14 V/*P O
phase servo on "L".
15 HFL I
Input terminal for track detection signals. Schmitt input.
16 TEST2 I
Input terminal for tracking error signals. Schmitt input.
17 TOFF O
Output terminal for tracking-off.
18 TGL O
Output terminal for tracking gain switching. "L" position increases gain.
19 JP+ O
Output for track jump control. 3 values can be output by a command.
20 JP- O
21 PCK O
Terminal for clock monitor for EFM data reproduction. 4.3218 MHz when phase locked.
Output terminal for synchronizing signal detection. "H" position when the synchronizing signals detected in EFM sign
22 FSEQ O
match with the synchronizing signals generated internally.
23 VDD -
Power terminal for digital signals.
24 CONT1 I/O
Generalized I/O terminal 1
25 CONT2 I/O
Generalized I/O terminal 2
26 CONT3 I/O
Generalized I/O terminal 3
27 CONT4 I/O
Generalized I/O terminal 4
28 CONT5 I/O
Generalized I/O terminal 5
EMPH/ Terminal for de-emphasis monitor. De-emphais disk is being reproduced while in the "H" position. Or generalized Ou
29 O
CONT6 terminal 6.
30 C2F O
Output terminal for C2 flag.
31 DOUT O
Output terminal for digital OUT. (EIAJ format)
32 TEST3 I
Input terminal for test. Pull-down resistor incorporated. Make sure to ground.
33 TEST4 I
Input terminal for test. Pull-down resistor incorporated. Make sure to ground.
Generalized I/O terminal for command identification. Pull-down resistor incorporated. When used as the same functi
34 PCCL I as LC78622E, open circuit or ground. ("H" position: enables only generalized I/O command to be controlled. "L" pos
enables all the commands to be controlled.)
MUTEL/C
35 O
ONT7
L channel
36 LVDD -
1-bit DAC
37 LCHO O
38 LVSS -
39 RVSS -
40 RCHO O
R channel
41 RVDD - 1-bit DAC
MUTER/C
42 O
ONT8
Input terminal for test. Pull-down resistor incorporated. Make sure to ground.
Output terminal for phase-comparator for external VCO control.
Ground terminal for internal VCO. Make sure to ground.
Resistive connection terminal for current regulation of PDO output.
Power terminal for internal VCO.
For VCO frequency range control.
Output terminal for EFM signals.
Input terminal for EFM signals.
Controlled by a serial data command from micro-computer. When not used, either u
as input terminal and then ground or use as output terminal and then open circuit.
Mute output terminal for L channel. Or generalized output terminal 7.
Power terminal for L channel.
Output terminal for L channel.
Ground terminal for L channel. Make sure to ground.
Ground terminal for R channel. Make sure to ground.
Output terminal for R channel.
Power terminal for R channel.
Mute output terminal for R channel. Or generalized output terminal 8.
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DESCRIPTION