59
HCD-GX470/GX570
MAIN BOARD IC901 uPD78F0547GC (S)-UBT-A (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
I-AC-PULSE
I
AC power detection signal input terminal
2
O-REC/PB
O
Recording/playback selection signal output terminal "L": playback, "H": recording
3
O-REC-MUTE
O
Recording muting on/off control signal output terminal "L": muting on
4
O-BIAS
O
Recording bias on/off control signal output terminal "H": bias on
5
O-STK-MUTE
O
Standby signal output to the power amplifier (for front speaker)
6
O-SW_GAIN
O
Sub woofer gain control signal output terminal Not used
7
O-POWER-RELAY
O
Power on/off relay drive signal output terminal "H": power on
8
O-XM-POWER3.3
O
Power on/off control signal output terminal for XM section (GX570)
9
I-AC-CUT
I
AC power off detection signal input terminal
10
I-XRESET
I
System reset signal input from the reset signal generator "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
11
XT2 (32.768KHZ)
O
Sub system clock output terminal (32.768 kHz)
12
XT1 (32.768KHZ)
I
Sub system clock input terminal (32.768 kHz)
13
FLMDO
I
Internal flash memory data writing mode control signal input terminal
14
X2 (16MHZ)
O
Main system clock output terminal (16 MHz)
15
X1 (16MHZ)
I
Main system clock input terminal (16 MHz)
16
REGC
-
External capacitor connection terminal for regulator
17
VSS
-
Ground terminal
18
EVSS
-
Ground terminal
19
VDD
-
Power supply terminal (+3.3V)
20
EVDD
-
Power supply terminal (+3.3V)
21
O-SYS-MUTE
O
Muting on/off control signal output terminal "L": muting on
22
O-SWR
O
Sub woofer speaker on/off relay drive signal output terminal "L": sub woofer speaker on
23
O-FRONT-SP-
RELAY
O
Front speaker on/off relay drive signal output terminal "H": front speaker on
24
O-XTCN
O
Oscillation circuit on/off control signal output to the CD DSP
"L": oscillation stop, "H": self-oscillation
25
O-MP3-RST
O
System reset signal output terminal "L": reset Not used
26
O-MP3-XLAT/
O-MP3-CS
O
MP3 serial data latch pulse signal output to the CD DSP
27
I-MP3-ACK
I
MP3 acknowledge signal input from the CD DSP
28
O-XLAT/
O-MP3-STB
O
CD serial data latch pulse signal output to the CD DSP
29
I-MP3-REQ
I
MP3 data request signal input from the CD DSP
30
O-MP3-CS/
O-MP3-LP
O
MP3 data request signal output to the CD DSP
31
O-D-MUTE/
O-XLT
O
System reset signal output to the motor/coil driver "L": reset
32
O-XRST
O
System reset signal output to the CD DSP "L": reset
33
O-LM-R
O
Loading motor control signal output terminal (reverse direction)
34
O-LM-F
O
Loading motor control signal output terminal (forward direction)
35
O-TM-R
O
Table motor control signal output terminal (reverse direction)
36
O-TM-F
O
Table motor control signal output terminal (forward direction)
37
I-CD-NUMBER-
SENS
I
Disc table address sensor input terminal
38
I-OPEN-SW
I
Disc table open/close detection switch input terminal "L": open, "H": close
39
I-XTUNED
I
Tuning detection signal input terminal Not used
Summary of Contents for HCD-GX470
Page 105: ...13 HCD GX470 GX570 MEMO ...
