Yamaha DSP-AX620 Service Manual page 31

IC501 : µPD784217AGF (OPERATION P.C.B.)
16 bit µ-COM (CPU)
No. PORT Name I/O Function
1 P60/A16 CKP O
2 P61/A17 O
3 P62/A18 O
4 P63/A19 O
5 P64//RD O
6 P65//WR O
7 P66//WAIT O
8 P67//ASTB SCN O
9 VDD +5BU
10 P100/TI5/TO5 VRB I
11 P101/TI6/TO6 VRA I
12 P102/TI7/TO7 /DMT O
13 P103/TI8/TO8 PRY O
14 P30/TO0 MRY O
15 P31/TO1 ERY O
16 P32/TO2 RIMA O
17 P33/TI1 RIMB O
18 P34/TI2 O
19 P35/TI00 HPRY O
20 P36/TI01 O
21 P37/EXA /HP I
22 TEST/Vpp Vpp
23 P90 O
24 P91 O
25 P92 O
26 P93 O
27 P94 O
28 P95 O
29 P120/RTP0 O
30 P121/RTP1 O
31 P122/RTP2 O
32 P123/RTP3 O
33 P124/RTP4 ROA I
34 P125/RTP5 ROB I
35 P126/RTP6 O
36 P127/RTP7 O
37 VDD +5BU
38 X2 X2
39 X1 X1
40 Vss MG
41 XT2 XT2
42 XT1 XT1
43 /RESET /RES
44 P00/INTP0 INT928 INT YSS928 IPINT
45 P01/INTP1 PDET INT POWER DOWN DETECT INT
46 P02/INTP2/NMI PSW INT Standby SW input(H edge)
47 P03/INTP3 REM1 INT Remote in
48 P04/INTP4 VSY INT Video Vertical Sync
49 P05/INTP5 CES I/O CE for On Screen/Video format
50 P06/INTP6 E/I O
TC74HC164 CLOCK
NC
NC
NC
NC
NC
NC
AK4382 CSN
Power Supply
Volume Rotary B
Volume Rotary A
DIG FULL MUTE
Power Relay
Speaker Relay Main
Speaker Relay Efect
Power Limiter A
Power Limiter B
NC
HEADPHONE RELAY
NC
HP Detect
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Rotary OPE A
Rotary OPE B
NC
NC
Power Supply
Main System Clock (10MHz)
Main System Clock (10MHz)
Ground
NC
Subsystem Clock
Reset
Internal/External Synchronous output
o. PORT Name I/O Function
100 Vss MG
99 P57/A15 CEL O LC78211/LC78213 CE
98 P56/A14 CET O NC
97 P55/A13 SCK O AUDIO IC CLOCK
96 P54/A12 SO O AUDIO IC DATA
95 P53/A11 CEV O CS3310 Enable
94 P52/A10 VMT O CS3310 Reset
93 P51/A9 O NC
92 P50/A8 O NC
91 P47/AD7 O NC
90 P46/AD6 /MTSW O MUTE LFE
89 P45/AD5 /MTC O MUTE CENTER
88 P44/AD4 /MMR O MUTE MAIN, REAR
87 P43/AD3 /TMT O TUN MUTE(L:ON)
86 P42/AD2 DEST I
85 P41/AD1 RDSE I/O RDS Enable / RDS (Not/Exit)
84 P40/AD0 TUN1 I
83 P87/A7 TUN0 I
82 P86/A6 /ST I
81 P85/A5 TUNED I
80 P84/A4 SCKR O RDS /OSD/BU2092 CLOCK
79 P83/A3 SDTR O RDS /OSD/BU2092 TxD
78 P82/A2 SDRR I
77 P81/A1 /ICD O YSS928 /DAC/CODEC
76 P80/A0 /CSY O YSS928 CE
75 P27//SCK0/SCL0 /SCKO O FL Driver Clock/FLA Clock
74 P26/SO0 SDF O FL Driver TxD /FLA RxD
73 P25/SI0/SDA0 CEFD O FL Driver CE /FLA TxD
72 P24/BUZ Vpp2
71 P23/PCL CEP O PLL IC Enable
70 P22/ASCK1//SCK1 SCKP O PLL IC CLOCK
69 P21/TxD1/SO1 SDTP O PLL IC TxD
68 P20/RxD1/SI1 SDRP I
67 P72/ASCK2//SCK2 YSSCK O YSS928 CLOCK
66 P71/TxD2/SO2 SDM O YSS928 TxD
65 P70/RxD2/SI2 SDD I
64 Avref Avref
63 P131/ANO1 /BLK O FL Driver Off
62 P130/ANO0 O NC
61 Avss
60 P17/ANI7 PRW AD V Protection
59 P16/ANI6 PRD AD Power Amp DC Detect
58 P15/ANI5 PRI AD I Protection
57 P14/ANI4 ADKEY0 AD KEY AD input 0
56 P13/ANI3 ADKEY1 AD KEY AD input 1
55 P12/ANI2 ADKEY2 AD KEY AD input 2
54 P11/ANI1 MODEL AD Model Detect (RX/AX)
53 P10/ANI0 PREMT AD POWER LIMITTER DETECT
52 AVref0 AVref0
51 AVdd AVdd
DSP-AX620
Ground
FREQ SW(R VER)
TUN STEP1
TUN STEP0
TUNER /ST
TUNED
RDS RxD (Reception)
PLL Reception
YSS928 RxD
Analog Reference Voltage
Analog Reference Voltage
Analog Power Supply
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