Sony MEX-1HD - Audio Library System, Руководство по обслуживанию

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93
MEX-1HD
• SUB BOARD IC501 MB90F574APMT-G-LPN1(SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 to 4 NC O
Not used
5 LINE_MUTING O
Audio line muting on/off control signal output terminal
6 XSYS_RST O
System reset signal output terminal “L”: reset Not used
7 MAIN_RST O
System reset signal output terminal
8 VCC
— Power supply terminal (+5V)
9 XAMP_MUTING O
Muting on/off control signal output to the power amplifier “L”: muting
10 E2CKO O
Serial data transfer clock signal output to the FM/AM tuner pack
11 E2SIO I/O
Two-way data bus with the FM/AM tuner pack
12
SUB_RXD/
FLS_SI
I UART receive data input from the CPU “L” active
13
SUB_TXD/
FLS_SO
O UART transmit data output to the CPU “L” active
14 BUS_ON O Bus on/off control signal output terminal “L” active Not used
15 BEEP O Buzzer drive signal output
16 TELATT
I
Telephone muting signal detection input terminal
At input of “H”, the signal is attenuated by 20 dB
17 UNISI I Serial data input terminal Not used
18 UNISO O Serial data output terminal Not used
19 UNICLK O
Serial data transfer clock signal output terminal Not used
20 NC O
Not used
21 DAC_SO
O Serial data output to the D/A converter
22 DAC_CLK O
Serial data transfer clock signal output to the D/A converter
23 XSIRCS_RST O
SIRCS reset signal output terminal “L”: reset Not used
24 SIRCS
I Remote control signal input from the remote control receiver
28 RTC_SI I
Serial data input from the real time clock
25 RTC_SO O
Serial data output to the real time clock
26 RTC_CLK O
Serial data transfer clock signal output to the real time clock
27 RTC CS O
Chip select signal output to the real time clock
29 XDAC_CS O
Chip select signal output to the D/A converter
30 XMS_DET0 I
Memory stick in/out detection signal input “L”: memory stick is inserted
31 XS_MUTING O
Muting on/off control signal output to the electrical volume “L”: muting
32 XUSB_DET I
USB cable detection signal input “L”: USB cable is connected
33 VSS
— Ground terminal
34 C
— Connected to the external capacitor for power supply
35 NC
— Not used
36 XMS_DET1 I
Memory stick in/out detection signal input “L”: memory stick is inserted
37 FSW_SFT O
Oscillation frequency shift control signal output for switching regulator
“L”: 300kHz, “H”: 330kHz
38 DVCC
— Power supply terminal (+5V) (for the D/A converter)
39 DVSS
— Ground terminal (for the D/A converter)
40, 41 NC
— Not used
42 AVCC
— Power supply terminal (+5V) (for the A/D converter)
43 AVRH I
Reference voltage (+5V) input terminal (for the A/D converter)
44 AVRL I
Reference voltage (0V) input terminal (for the A/D converter)
45 AVSS
— Ground terminal (for the A/D converter)
46 KEYIN0 I
Key input terminal (A/D input)
47 TEMP I
Connected to the temperature sensor