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