Yamaha RX-V800 Service Manual page 31

IC526 : M30802SGP
Pin Description
No. Port No. Function name
1 P96 TXDR
2 P95 RTS
3 P94 CTS
4 P93 FAN
5 P92 SDTN
6 P91 RXRDS
7 P90 SCKN
8 P146 E/I
9 P145 CEBU
10 P144 /FLR
11 P143 CEM0
12 P142 CEM1
13 P141 RDSE
14 P140 CES
15 BYTE BYTE
16 CNVss CNVss
17 P87 MODEL
18 P86 BOOT
19 RESET RESET
20 XOUT XOUT
21 VSS VSS
22 XIN XIN
23 VCC VCC
24 P85 NMI
25 P84 REM1
26 P83 PEW
27 P82 PDET
28 P81 VSY
29 P80 /ICD
30 P77 RXDR
31 P76 /DMT
32 P75 INT928
33 P74
34 P73 CEP
35 P72 SCKP
36 P71 RDTP
37 P70 SDTP
38 P57 SDM
39 VCC VCC
40 P66 SDD
41 VSS VSS
42 P65 SCK
43 P64 /CSA
44 P63 CEC
45 P62 CEC
46 P61 SCKC
47 P60 CSV
48 P137 /CSM
49 P136 VRB
50 P135 VRA
51 P134 PRI
52 P57
53 P56
54 P55
55 P54
56 P133 /BEC
57 VSS VSS
58 P132 /Z2MT
59 VCC VCC
60 P131 /HPMT
61 P130 /FMTF
62 P53
63 P52
64 P51
65 P50
66 P127 /FMTS
67 P126 /FMTC
68 P125 /FMTM
69 P47
70 P46
71 P45
72 P44
73 P43
74 VCC VCC
75 P42
I/O Detail of function
O 232C transmission data / Yokokawa data transmission
I/O 232C RTS output / Yokokawa clock input
I 232C CTS input
I Fan control
O None audio serial transmission data (necessary port)
I RDS received / Frequency switch (R version)
SCK None audio serial clock
O Outside / inside synchronized output
O BU2092CE or ZONE2
O FL IC reset
O FL1 enable
O FL2 enable
O RDS enable or RDS
O Onscreen enable output / N/P format
VSS Vss at 16 bit data
VCC Vcc at microprocessor mode
I Model distinction
I Boot terminal for Yokokawa tool
I Reset
O Oscillate output
VSS Microcomputer ground
I Oscillate input
I Microcomputer power supply +5V
I Pullup by Vcc / 232C boot
I Remote control pulse input and LO edge interrupted
I Power switch and HI edge interrupted
I Power detect and LO edge interrupted
I Vertical synchronized detect
O IC YSS928 / DA / AD / CODEC / DEM
I 232C receive data (connect to pin 29)
O Digital full mute
I YSS928 IPINT / MUTE / DIR
O PLL IC enable
O PLL IC clock
I PLL IC receive data
O PLL IC transmission data (necessary PU)
O YSS928 transmission data
VCC Microcomputer power supply +5V
I YSS928 receive data
VSS Microcomputer ground
SCK YSS928 clock
O YSS928 CE
O CS3310 serial transmission data
O CS3310 enable
SCK CS3310 serial clock
O CS3310 power supply control
O CS3310 reset
I Volume rotary B
I Volume rotary A
I Current protection
O Bus extension control
VSS Microcomputer ground
O Zone 2 mute
VCC Microcomputer power supply +5V
O Headphone mute
O Full mute FL / FR / MAIN -3dB
OE
WE
O Full mute SWL / SWR / SW MONO
O Full mute CENTER
O Full mute MAIN L / R, RL / RC / RR"
VCC Microcomputer power supply +5V
RX-V800/RX-V800RDS/HTR-5280
ON OFF BU
O OL OL
I/O OL OL
I I OL
I I OL
SO OL OL
SI I OL
SCK OL OL
O OL OL
O OL OL
O OL OL
O OL OL
O OL OL
O OL OL
O OL OL
Vss Vss Vss
Vcc Vcc Vcc
I I OL
I I OL
– –
– –
– –
– –
– –
– –
I I OL
I I OL
I I
I I OL
O OL OL
I I OL
O OL OL
I I OL
O OL OL
O OL OL
O OL OL
I I OL
O OL OL
SO OL OL
SI I OL
SCK OL OL
O OL OL
SO OL OL
O OL OL
SCK OL OL
O OL OL
O OL OL
I I OL
I I OL
I I
HI
HI
HI
HI
O OL OL
O OL OL
O OL OL
O OL OL
HI
HI
HI
HI
O OL OL
O OL OL
O OL OL
Just before
Just before
Just before
Just before
Just before
Just before
–
–
–
–
–
–
I
I
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