Sony MDS-EX880 Service Manual page 33

• MAIN BOARD IC305 µPD78078GF-082-3BA (MASTER CONTROLLER)
Pin No. Pin Name
DATA0 to
1 to 4
DATA3
5 CLOCK OUT
6, 7 NC
8 POW DOWN
9 VSS
10 X2
11 X1
12 VDD
13 XT2
14 XT1
15 RESET
16 CLOCK IN
17 BUS BUSY
18
SENSOR (MAIN)
19 JOG A
20 JOG B
21, 22 NC
23 AVDD
24 AVREF0
25 KEY0
26
KEY1
27 KEY2
28 KEY3
29 SERIAL
30 3DISC
31 FL13
32 SEPARATE
33 AVSS
34 LOAD DA
35 ELV DA
36 AVREF1
37 UART RXD
38 UART TXD
39 NC
40 VSS
41 NC
42 FL DATA
43 FL CLOCK
44
FL CL
I/O
I/O Two-way data bus with the system control bus
O
Bus data transfer clock signal output terminal for the system control bus
I Not used (fixed at "L")
I
Power down detection signal input terminal "L": power down, normally: "H"
—
Ground terminal
O Main system clock output terminal (5 MHz)
I Main system clock input terminal (5 MHz)
— Power supply terminal (+5V)
O
Sub system clock output terminal Not used (open)
I Sub system clock input terminal Not used (fixed at "H")
System reset signal input from the reset signal generator (IC316) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I
Bus data reading clock signal input for the system control bus
I/O
Busy signal in/out terminal for the system control bus
I
Detection signal input from the elevator position sensor (D1; MAIN side)
I Jog dial pulse (A) input from the rotary encoder (S661) (for SELECTOR)
I
Jog dial pulse (B) input from the rotary encoder (S661) (for SELECTOR)
I
Not used (fixed at "L")
— Power supply terminal (+5V) (for A/D converter)
I Reference voltage (+5V) input terminal (for A/D converter)
Key input terminal (A/D input) (S700 to S707) DISPLAY, PROGRAM, SHUFFLE,
I
CONTINUE, DISC SKIP, REPEAT, REC IT, CD SYNC keys input
Key input terminal (A/D input) (S711 to S713, S716 and S718)
I
MD1 to MD3, fl, ENTER/YES keys input
Key input terminal (A/D input) (S721 to S723 and S726 to S728)
I
REC 1 to REC 3, p, RELEASE, MENU/NO keys input
I Key input terminal (A/D input) (S708 and S709)
Input terminal for the SERIAL/UART setting
I
"L": SERIAL, "H": UART (fixed at "L" in this set)
Input terminal for the MD changer type setting
I
"L": 3 discs, "H": 5 discs (fixed at "L" in this set)
Input terminal for the figure number setting of display
I
"L": 14 figures, "H": 13 figures (fixed at "H" in this set)
Input terminal for the separate/complete type setting of MD section and other sections
I
"L": complete type, "H": separate type (fixed at "H" in this set)
— Ground terminal (for A/D converter)
O D/A output of loading motor drive signal Not used (open)
O
D/A output of elevator motor drive signal Not used (open)
I
Reference voltage (+5V) input terminal (for D/A converter)
I
Receive data input of UART data Not used (open)
O
Transmit data output of UART data Not used (open)
I
Not used (fixed at "L")
—
Ground terminal
I Not used (fixed at "L")
O Serial data output to the fluorescent indicator tube driver (IC701)
O Serial data transfer clock signal output to the fluorescent indicator tube driver (IC701)
O Chip enable signal output to the fluorescent indicator tube driver (IC701) "L" active
Function
0, ) keys input
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