Sony HCD-RG490 Service Manual page 72

HCD-RG490/RG590
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
72
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 Not used
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
System reset signal output to the MP3 decoder "L": reset
O
(RG490: Mexican/RG590: Mexican models)
MP3 serial data latch pulse signal output to the CD DSP
O (Except RG490: Mexican/RG590: Mexican models)
MP3 chip select signal output to the MP3 decoder (RG490: Mexican/RG590: Mexican models)
MP3 acknowledge signal input from the CD DSP
(Except RG490: Mexican/RG590: Mexican models)
I
MP3 acknowledge signal input from the MP3 decoder
(RG490: Mexican/RG590: Mexican models)
CD serial data latch pulse signal output to the CD DSP
O (Except RG490: Mexican/RG590: Mexican models)
Standby signal output to the MP3 decoder (RG490: Mexican/RG590: Mexican models)
MP3 data request signal input from the CD DSP
(Except RG490: Mexican/RG590: Mexican models)
I
MP3 data request signal input from the MP3 decoder
(RG490: Mexican/RG590: Mexican models)
MP3 data request signal output to the CD DSP
(Except RG490: Mexican/RG590: Mexican models)
O
MP3 serial data latch pulse signal output to the MP3 decoder
(RG490: Mexican/RG590: Mexican models)
Description