HCD-EH25/EH26
37
PANEL BOARD IC701 MB90F830PF-GE1 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 LED O LED drive signal output terminal for liquid crystal display back light "H": LED on
2 CD OPEN/CLOSE I CD lid open/close detection switch input terminal "L": CD lid is closed
3 REQ I Request signal input from the CD-MP3 processor
4 MMUT O Muting signal output to the coil/motor driver
5 to 8 BUS0 to BUS3 O Serial data output to the CD-MP3 processor
9 RMC I Remote control signal input from the remote control receiver
10 BUCK O Serial data transfer clock signal output to the CD-MP3 processor
11 XCCEN O Chip enable signal output to the CD-MP3 processor
12 XRST O Reset signal output to the CD-MP3 processor "L": reset
13 X2 I Sub system clock input terminal (32768 Hz)
14 X3 O Sub system clock output terminal (32768 Hz)
15 VCC - Power supply terminal (+3.3V)
16 VSS - Ground terminal
17 USB_RESET O Reset signal output to the USB controller "L": reset
18 MCHING O Music change signal output to the USB controller
19 USB_BUSY I Command operation busy signal input from the USB controller
20 USB_FLG I Flag delay signal input from the VBUS power on/off switch
21 USB_EN O Power supply on/off control signal output to the VBUS power on/off switch "H": power on
22 LED_STBY O LED drive signal output terminal for STANDBY indicator "L": LED on
23 CD_ON O Power supply on/off control signal output terminal for CD section "H": power on
24 USB_REG_ON O Power supply on/off control signal output terminal for USB section "H": power on
25 TU_DO I Serial data input from the FM/AM tuner
26 RDS_DATA I RDS serial data input from the RDS decoder (EH25: AEP, UK/EH26 only)
27 to 29 NC - Not used
30 AUDIO_SW O CD/USB audio selection signal output to the audio select switch "L": CD, "H": USB
31 NC - Not used
32 AVCC - Power supply terminal (+3.3V)
33 FUNC_SDA O Serial data output to the electrical volume
34 AMP_ON O Standby control signal output to the power amplifi er "L": standby
35 AVSS - Ground terminal
36 P_MONI I Power monitor input terminal
37, 38 KEY1, KEY2 I Front panel key input terminal (A/D input)
39 TU_ASD I Auto gain control signal input from the FM/AM tuner
40 TP_STATE I REC/PB detection signal input terminal
41 KEY0 I Power key input terminal
42 HOLD I Hold signal input terminal
43 SBSY I Subcode block sync signal input from the CD-MP3 processor
44 VSS - Ground terminal
45 RDS_CLK I
RDS serial data transfer clock signal input from the RDS decoder
(EH25: AEP, UK/EH26 only)
46 POWER_ON O Main power supply on/off control signal output terminal "H": power on
47 SUFIX I Destination setting terminal
48 RE_VOL I Jog dial pulse input from the rotary encoder (for VOLUME)
49 USB_SDA I/O Two-way I2C data bus with the USB controller
50 USB_SCL O I2C clock signal output to the USB controller
51 MD2 I Mode setting terminal Fixed at "L" in this set
52, 53 MD1, MD0 I Mode setting terminal Fixed at "H" in this set
54 RESET I
Reset signal input terminal "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
55 TU_CE O Chip enable signal output to the FM/AM tuner
56 TU_CLK O Serial data transfer clock signal output to the FM/AM tuner
57 TU_DI O Serial data output to the FM/AM tuner
58 V3 -
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive volt-
age
59 to 62 COM0 to COM3 O Common drive signal output to the liquid crystal display
63, 64 SEG0, SEG1 O Segment drive signal output to the liquid crystal display
To Next Page
Loading...
