Advertisement
IC, µPD78012FGC–656–AB8
Pin No.
Pin Name
1
TE-BAL
2
LO-REV
3
LO-FWD
4
LIMT-SW
5
RE-SW
6
SV-CONT
7 ~ 8
NC
9
VSS
10 ~ 17
NC
18
SRQ
19
SLEEP
20
CHUCK-SW
21
LOAD-SW
22
8/12-SW
23
CD-ON
24
VSS
25 ~ 26
NC
27
APC
28 ~ 30
NC
31
LOCK
32
FOK
33
C2PO
34
GFS
35
RESET
36
NC
37
SCOR
38
SENS
39
CS
40
VDD
41
X2
42
X1
43
IC
44
XT2
45
XT1
46
AVSS
47 ~ 48
NC
49
SCLK
50
CLK-DSP
51
LAT-DSP
I/O
–
Not used.
O
Loading motor reverse drive output.
O
Loading motor forward drive output.
I
Inner edge limit switch.
O
CD/CD-RW switching output.
Outputs "H" when power is turned on.
O
(When power is supplied, this pin outputs "H" after DSP is initialized.)
–
Not connected.
–
Ground.
–
Not connected.
O
Mechanism microprocessor communication request.
I
SLEED request from system microprocessor.
I
Chucking complete switch.
I
Disc loading switch.
I
8/12-cm check switch.
O
CD mechanism power control output.
–
Ground.
–
Not connected.
O
Laser on/off switching output.
–
Not connected.
Outputs "H" when GFS sampled by 460 Hz is "H"; "L" when GFS is "L" continuously for 8
I/O
samplings. Or, a signal is input when LKIN is "1".
I/O
Focus OK signal input/output.
I
C2PO input.
I
GFS input.
I
System reset input.
–
Not connected.
I
Sub-code sync input.
I
SENS input.
I
CS signal input.
–
Power supply.
–
For generating main system clock.
I
For generating main system clock.
–
Connected to ground.
–
Not used.
–
Connected to VDD.
–
Ground.
–
Not connected.
O
Outputs clock for reading SENS serial data.
O
Outputs clock for transferring DSP serial data.
O
DSP serial data latch output.
Description
– 24 –
Advertisement
