Onkyo TX-DS494 Service Manual page 12

MICROPROCESSOR TERMINAL DESCRIPTIUON
Q7001: MPD78P0208GF
No. Function I/O
1 VDD I Power supply terminal. (+5V)
2 STBY/RECV O STANDBY/RECEIVED inductor control output terminal.
3 FSWSDO O Data output terminal to function switch ICs.
4 FSWSCK O Clock output terminal to function switch ICs.
5 FSWSLT O Latch output terminal to function switch ICs.
6 RDSDATA I Data input terminal from RDS decoder.
7 SDO O Data output terminal to PLL IC and Master volume IC (TC9482N).
8 SCK O Clock output terminal to PLL IC and Master volume IC (TC9482N).
9 PLLCE O Chip enable output terminal to PLL IC.
10 RESET I System reset input terminal.
11 X1 O Ceramic oscillator connection terminals.
12 X2 I Connect 5.0MHz ceramic oscillator between the both terminals.
13 GND I Internal connection terminal.(to GND)
14 XT2 O Sub system clock output terminal. Not used.
15 XT1 I Sub system clock input terminal. Not used.(to GND)
16 Vdd I Power supply terminal .(+5V)
17 VOL SLT O Latch output terminal to Master volume IC(TC9482N).
18 SYSOUT O System code output terminal.
19 DSPSDI I Data input terminal from DIR(AK4110).
20 DSPSDO O Data output terminal to DIR (AK4110),DSP(CS4926,).
21 DSPSCK O Clock output terminal to DIR (AK4110),DSP(CS4926)
22 KARCS O Not used.
23 DSPCS O Chip enable output terminal to DSP(CS4926).
24 DSPRST O Reset output terminal to DSP(CS4926).
25 AVSS I Power supply terminal.(GND)
26 AM9K/10K I Initializing input terminal for AM band step.
27 HPIN I Detection input terminal from headphone..
28 MODE I Initializing input terminal of operation mode..
29 ECHO I Not used.
30-33 K3-K0 I Operation key connection terminals.
34 AVDD I Power supply terminal.(+5V)
35 AVREF I Reference voltage terminal.
36 SYSIN I System code input terminal.
37 POFF I Power failure detection terminal.
Description
86-100 15G-1G
No. Function I/O
38 RDSSCK I Clock input terminal from RDS decoder.
39 REMIN I Signal input terminal from remote sensor.
40 VSS I Power supply terminal (GND).
41 TUMUT O Muting control output terminal for tuner section.
42 AMUT O Muting control output terminal for amplifier section.
43 ABOOT/INT I/O AUTOBOOT and INTREQ I/O terminal for DSP(CS4296).
44 KARRST O Not used.
45 CFGGAIN O Not used.
46 VDD I Power supply terminal (+5V).
47 GAINCTL O Gain control output terminal.
48 CODECPD O Power down signal output terminal to CODEC(AK4526).
49 DIRPD O Power down signal output terminal to DIR (AK4110).
50 DIRCS O Chip enable output terminal to DIR (AK4110).
51 BTADRL O Output terminal to set LSB position of address to boot ROM (MX29F002T).
52 BTADRH O Output terminal to set MSB position of address to boot ROM (MX29F002T).
53 SD I Broadcast detection input terminal.
54 STEREO I Stereo broadcast detection input terminal.
55 RDSSIG I Signal input terminal from RDS decoder.
56 SWMUTE O SW Preout muting control output terminal for amplifier section.
57 ERF I ERF Signal input terminal from DIR(AK4110).
58 FS96 O FS96 Signal output terminal to CODEC(AK4526)
59 CODECCS O Not used.
60 ENC1 I Volume control input terminal.
61 ENC2 I Volume control input terminal.
62 PROTECT I Detection input terminal for protection circuit.
63 POWER O Relay control output terminal for power.
64 VCTLB O Video selector control output terminal.
65 VCTLA O Video selector control output terminal.
66 SPARL O Control output terminal for SPEAKER A relay.
67 SPBRL O Control output terminal for SPEAKER B relay.
68-78 P17-P7 O Segment output terminals for FL tube.
79 VLOAD Power supply terminal for FL tube.
80-85 P6-P1 O Segment output terminals for FL tube.
O Grid output terminals for FL tube.
TX-DS494/HT-R490
Description