Sony DPS-V55 Service Manual page 22

• MAIN BOARD IC701 MB90641APF-G-105BND (CPU)
Pin No. Pin Name
1 to 10 A0 to A9
11 VSS
12 to 16 A10 to A14
17, 18 A15, A16
19 to 22 —
23 VCC
24 to 26
—
27 C
28 to 31 P71 to P74
32, 33 P75, P76
34, 35 VCC
36, 37 VSS
38 P60
39 P61
40 P62
41 P63
42 VSS
43 P64
44 P65
45 P66
46 P67
47 P80
48 P81
49
MD0
50 MD1
51 MD2
52 HSTX
53 REDY
54 XLAT
55 TRDT
56 RVDT
57 SCK
58 MIDI IN
59 MIDI OUT
60 BATT CHK
61 OUTPUT MUTE
62, 63 —
64 CS0
65 CS1
LCD
66
CONTRAST ON
67 ADMUTE
68 ADLAT
69 ADCLK
70 ADDAT
71, 72
—
I/O
O Address signal output to the static RAM (IC702) and EP-ROM (IC704)
— Ground terminal
O
Address signal output to the static RAM (IC702) and EP-ROM (IC704)
O
Address signal output to the EP-ROM (IC704)
O Not used (open)
— Power supply terminal (+5V)
O
Not used (open)
— Connected to capacitor
I
Key return signal input terminal "L" active
O
Key scan signal output terminal "L" active
— Power supply terminal (+5V)
— Ground terminal
O LED drive signal output for the INPUT LEVEL 1 LED (D801: red) "L": LED on
O
LED drive signal output for the INPUT LEVEL 1 LED (D801: green) "L": LED on
O
LED drive signal output for the INPUT LEVEL 2 LED (D802: red) "L": LED on
O LED drive signal output for the INPUT LEVEL 2 LED (D802: green) "L": LED on
— Ground terminal
O LED drive signal output for the INPUT LEVEL 3 LED (D803: red) "L": LED on
O LED drive signal output for the INPUT LEVEL 3 LED (D803: green) "L": LED on
O LED drive signal output for the INPUT LEVEL 4 LED (D804: red) "L": LED on
O
LED drive signal output for the INPUT LEVEL 4 LED (D804: green) "L": LED on
I
Dial pulse input from the rotary encoder (SW841) "L" active
I Dial pulse input from the rotary encoder (SW841) "L" active
I
Setting terminal for the external vector mode Fixed at "L" in this set
I
Setting terminal for the external vector mode Fixed at "H" in this set
I
Setting terminal for the external vector mode Fixed at "L" in this set
I
Hardware standby input terminal Fixed at "H" in this set
I
Ready detection signal input from the DSP (IC502) "L": busy status
O
Serial data latch pulse output to the DSP (IC502)
I UART serial data input from the DSP (IC502)
O
UART serial data output to the DSP (IC502)
O
UART serial data transfer clock signal output to the DSP (IC502)
I
Input terminal for the MIDI connection
O
Output terminal for the MIDI connection
I
Voltage detection input for the lithium battery (BA701) "L": no battery
O
Muting on/off selection signal output for the analog output circuit "H": muting on
O Not used (open)
O
Chip select signal output to the EP-ROM (IC704) "L" active
O
Chip select signal output to the static RAM (IC702) "L" active
O
Control signal output to the liquid crystal display contrast adjustment circuit "H": contrast on
O
Muting control signal output to the A/D converter (IC501, 551) "L": muting on
O Serial data latch pulse output to the A/D converter (IC501, 551)
O
Serial data transfer clock signal output to the A/D converter (IC501, 551)
O
Serial data output to the A/D converter (IC501, 551)
O
Not used (open)
Function
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