Advertisement
PC-X250
LC78622 Pin Functions
Pin No.
Symbol
I/O
1
DEFI
I
2
TAI
I
3
PDO
O
4
VV
Ð
SS
5
ISET
AI
6
VV
Ð
DD
7
FR
AI
8
V
Ð
SS
9
EFMO
O
10
EFMIN
I
11
TEST2
I
12
CLV
O
+
13
CLV
O
Ð
14
V/P
O
15
HFL
I
16
TES
I
17
TOFF
O
18
TGL
O
19
JP
O
+
20
JP
O
Ð
21
PCK
O
22
FSEQ
O
23
V
Ð
DD
24
CONT1
I/O
25
CONT2
I/O
26
CONT3
I/O
27
CONT4
I/O
28
CONT5
I/O
29
EMPH
O
30
C2F
O
31
DOUT
O
32
TEST3
I
33
TEST4
I
34
N.C.
Ð
35
MUTEL
O
36
LV
Ð
DD
37
LCHO
O
38
LV
Ð
SS
39
RV
Ð
SS
40
RCHO
O
41
RV
Ð
DD
42
MUTER
O
43
XV
Ð
DD
44
X
O
OUT
45
X
I
IN
46
XV
Ð
SS
47
SBSY
O
48
EFLG
O
49
PW
O
50
SFSY
O
1 - 18
Defect detection signal (DEF) input. (Must be connected to 0 V when unused.)
Test input. A pull-down resistor is built in. Must be connected to 0 V.
External VCO control phase comparator output
Internal VCO ground. Must be connected to 0 V.
PLL pins
PDO output current adjustment resistor connection
Internal VCO power supply
VCO frequency range adjustment
Digital system ground. Must be connected to 0 V.
EFM signal output
Slice level control
EFM signal input
Test input. A pull-down resistor is built in. Must be connected to 0 V.
Disc motor control output.
Three-value output is also possible when specified by microprocessor command.
Rough servo/phase control automatic switching monitor output. Outputs a high level during rough servo and a low level
during phase control.
Track detection signal input. This is a Schmitt input.
Tracking error signal input. This is a Schmitt input.
Tracking off output
Tracking gain switching output. Increase the gain when low.
Track jump output.
Three-value output is also possible when specified by microprocessor command.
EFM data playback clock monitor. Outputs 4.3218 MHz when the phase is locked.
Synchronization signal detection output. Outputs a high level when the synchronization signal detected from the EFM
signal and the internally generated synchronization signal agree.
Digital system power supply.
General-purpose I/O pin 1
General-purpose I/O pin 2
Controlled by serial data commands from the microprocessor. Any of these that are unused
General-purpose I/O pin 3
must be either set up as input ports and connected to 0 V, or set up as output ports and
left open.
General-purpose I/O pin 4
General-purpose I/O pin 5
De-emphasis monitor pin. A high level indicates playback of a de-emphasis disk.
C2 flag output
Digital output. (EIAJ format)
Test input. A pull-down resistor is built in. Must be connected to 0 V.
Test input. A pull-down resistor is built in. Must be connected to 0 V.
Unused. Must be left open.
Left channel mute output
Left channel power supply
Left channel
one-bit D/A converter
Left channel output
Left channel ground. Must be connected to 0 V.
Right channel ground. Must be connected to 0 V.
Right channel output
Right channel
one-bit D/A converter
Right channel power supply
Right channel mute output
Crystal oscillator power supply.
Connections for a 16.9344 crystal oscillator element
Crystal oscillator ground. Must be connected to 0 V.
Subcode block synchronization signal output
C1, C2, single and double error correction monitor pin
Subcode P, Q, R, S, T, U, V and W output
Subcode frame synchronization signal output. This signal falls when the subcodes are in the standby state.
Function
Hide quick links:
Advertisement
