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Sanyo CWM-460 Service Manual page 14

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IC BLOCK DIAGRAM & DESCRIPTION
IC501 LC78622 (Digital 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
14
V/*P
O
"H"position, 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
22
FSEQ
O
EFM signals 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
29
O
CONT6
generalized Output 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
34
PCCL
I
same function as LC78622E, open circuit or ground. ("H" position: enables only generalized I/O command to
be controlled. "L" position: enables all the c
MUTEL/C
35
O
ONT7
L channel 1-
36
LVDD
-
bit DAC
37
LCHO
O
38
LVSS
-
39
RVSS
-
40
RCHO
O
R channel 1-
41
RVDD
-
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 use 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.
DESCRIPTION
- 13 -
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