Yamaha CD-S300 Service Manual page 29

Pin No. Function Name
1 EEP_WP
2 EEP_SDA
3 DAC_/CS
4 DAC_SCL
5 DAC_SDA
6 OCD_MODE
7 /AMUTE
8 ABUS_SW
9 RESET
10 XOUT
11 VSS/AVSS
12 XIN
13 VCC/AVCC
14 232C_PCON
15 IR
16 FL_/RST
17 FL_CLK
18 FL_DATA
19 FL_CS
20 CLSW
21 OPSW
22 DOWNSW
23 UPSW
24 TBL_POS
25 USB_PCON
26 HSW_/FLG
27 HSW_/EN
28 iPod_IF
29 USB_IN
30 CANCEL
31 C2_Flag
32 USB_/RST
33 USB_RX
34 USB_TX
35 DOUT2
36 RIN2
37 CLOSE
38 OPEN
39 CL_DOWN
40 CL_UP
41 TBL_L
42 TBL_R
43 DOUT_MUTE
44 CD_MUTE
45 232C_TX
46 232C_RX
47 CLK2
48 RxD2
49 TxD2
50 DSP_CE
I/O
O Wright protection of EEPROM (IC304)
O Serial data to EEPROM (IC304)
O Chip select to audio DAC (IC302)
O Serial clock to audio DAC (IC302)
O Serial data output to audio DAC (IC302)
I Input High --> Normal, Low --> Writing ROM mode
O Muting control signal to audio circuit
O No use
I Input RESET signal of IC305
O Oscillator OUT
GND DGND
I Oscillator IN
Power D+3.3V
O
I Input the signal from remote control
O RESET signal to FL-display
O Serial clock to FL-display (V701)
O Serial data output to FL-display (V701)
O Chip select to FL-display (V701)
I
I Detect OPEN SW of CD-loader mechanism
I
I Detect CLAMP-UP SW of CD-Loader mechanism
I
O Control IC301(DC/DC converter) and USB+5V is ON/OFF
High --> USB+5V is supplied
I Detect the status of IC6 (current limiter)
O Control IC6 (current limiter)
I Control signal from iPod to change communication format
I Detect to plug in USB memory or iPod
I Request signal for cancel busy condition
I Input FMON2 (C2F) signal from CD-DSP (IC2)
O RESET signal to USB-ucom (IC7)
I RX signal from USB-ucom (IC7)
O TX signal to USB-ucom (IC7)
O Reserved (for 232C)
I Reserved (for 232C)
O Control signal for closing tray
O Control signal for opening tray
O
O
O
O
O Muting digital-out signal on pure direct
Low --> Digital-output signal is muting
I Detect the muting control signal from CD-DSP (IC2) during loading disc or searching track
O
I
O Output the clock signal to CD-DSP
I Input the status signal from CD-DSP
O Output the status signal to CD-DSP
O Output chip_enable signal to CD-DSP
Detail of Function
High --> Muting is active
High --> Normal, Low --> Over current
Low --> Enable output
High --> Detect USB memory or iPod
CD-S300
29