Onkyo TX-SR502 Service Manual page 10

MICROPROCESSOR TERMINAL DESCRIPTIONS-2
Q7502:MPD780232GC-030-8BT(SUB MICROPRCESSOR)
No. Pin name I/O Description
1 VDD1 I Power supply terminal. Connect to 5V.
2 VSS1 I Ground terminal.
3 X1 I X'tal input terminal.
4 X2 O X'tal input terminal.
5 IC I Connect to ground. Not used.
6 ~RESET System reset signal input terminal.
I
Clock input terminal to transmit the
7 SUBCL/SCK I
signal from main microprocessor.
Data input terminal to transmit the signal
8 SUBDO/SDI I
from main microprocessor.
Data output terminal to transmit the signal
9 SUBDI/SDO O
to main microprocessor.
Data ready output terminal to transmit to
10 SUBRDY
O
the main microprocessor.
Pulse input terminal from the rotary encoder
11 VBJ
I
of volume.
Pulse input terminal from the rotary encoder
12 VAJ
I
of volume.
13 ~SYSIN System code input terminal.
I
14 ~SYSOUT System code output terminal.
O
15 ~IRIN I Not used.
Signal input terminal from the remote
16 ~IRF
I
controller.
17 STBYLED O Standby LED control output terminal.
18 AVSS I Ground terminal for A/D converter.
19 K3 I Operation key connection terminal-3.
20 K2 I Operation key connection terminal-2.
21 K1 I Operation key connection terminal-1.
22 K0 I Operation key connection terminal-0.
23 VSS0 I Ground terminal.
24 AVDD I Power supply terminal for A/D converter.
25 VDDO I Power supply terminal. Connect to +5V.
26 NU ---
Not used.
27 PURE O PURE AUDIO LED control output terminal.
O
28 P35 Segment output terminal of P35.
29 P34 Segment output terminal of P34.
O
30 P33 O Segment output terminal of P33.
31 P32 Segment output terminal of P32.
O
32 P31 O Segment output terminal of P31.
33 P30 Segment output terminal of P30.
O
34 P29 Segment output terminal of P29.
O
35 P28 Segment output terminal of P28.
O
36 P27 O Segment output terminal of P27.
37 P26 O Segment output terminal of P26.
38 P25 Segment output terminal of P25.
O
O
39 P24 Segment output terminal of P24.
40 P23 O Segment output terminal of P23.
No. Pin name I/O Description
41 P22 O Segment output terminal of P22.
O
42 P21 Segment output terminal of P21.
O
43 P20 Segment output terminal of P20.
O
44 P19 Segment output terminal of P19.
45 P18 O Segment output terminal of P18.
46 P17 O Segment output terminal of P17.
47 P16 O Segment output terminal of P16.
48 P15 Segment output terminal of P15.
O
49 P14 O Segment output terminal of P14.
50 P13 Segment output terminal of P13.
O
51 P12 O Segment output terminal of P12.
52 P11 O Segment output terminal of P11.
53 P10 O Segment output terminal of P10.
54 P9 O Segment output terminal of P9.
O
55 P8 Segment output terminal of P8.
56 P7 O Segment output terminal of P7.
57 P6 O Segment output terminal of P6.
58 P5 O Segment output terminal of P5.
59 VDD2 I Power supply terminal. Connect to +5V.
Negative power supply terminal of FL
60 VLOAD I
controller.
61 P4 Segment output terminal of P4.
O
62 P3 Segment output terminal of P3.
O
O
63 P2 Segment output terminal of P2.
64 P1 Segment output terminal of P1.
O
65 16G Grid output terminal of 16G.
O
66 15G Grid output terminal of 15G.
O
67 14G O Grid output terminal of 14G.
O
68 13G Grid output terminal of 13G.
69 12G O Grid output terminal of 12G.
O
70 11G Grid output terminal of 11G.
71 10G O Grid output terminal of 10G.
O
72 9G Grid output terminal of 9G.
73 8G Grid output terminal of 8G.
O
74 7G O Grid output terminal of 7G.
O
75 6G Grid output terminal of 6G.
76 5G Grid output terminal of 5G.
O
77 4G O Grid output terminal of 4G.
78 3G O Grid output terminal of 3G.
79 2G Grid output terminal of 2G.
O
80 1G Grid output terminal of 1G.
O
TX-SR502/E/8250/HT-R520