Yamaha AV-S77 Service Manual page 24

AV-S77
IC200 : M30217MA-A208FP (16 bit
No. PORT Name
78 P52 FLD10
79 P51 FLD9
80 P50 FLD8
81 P67 FLD7
82 P66 FLD6
83 P65 FLD5
84 P64 FLD4
85 P63 FLD3
86 P62 FLD2
87 P61 FLD1
88 P60 FLD0
89 VEE -
90 P107 AN7
91 P106 AN6
92 P105 AN5
93 P104 CMOS
94 P103 CMOS
95 P102 AN2
96 P101 AN1
97 AVSS -
98 P100 AN0
99 VREF -
100 AVCC -
G
KEY input (A-C) Pull-up resistance 10k
Ω
0
V — 0.556
KEY 0 STANDBY/ON
(98pin)
KEY 1
DSP
(96pin)
G
Destination select input (95 pin A-D) Pull-up resistance 10k
Ω
2k
V
0.556 — 1.111
Destination Ex
(English)
23
µ
-COM)
IN/OUT
OUT SEGMENT 25 (P25)
OUT SEGMENT 26 (P26)
OUT SEGMENT 27 (P27)
OUT SEGMENT 28 (P28)
OUT SEGMENT 29 (P29)
OUT SEGMENT 30 (P30)
OUT SEGMENT 31 (P31)
OUT SEGMENT 32 (P32)
OUT SEGMENT 32 (P33)
OUT SEGMENT 34 (P34)
OUT SEGMENT 35 (P35)
- P0, P1, P5, P6 pull-down resistance voltage input
A-D IN SW protection IN
A-D IN AUTO POWER ON/OFF identify IN (music signal)
A-D IN Center unit power supply voltage detect IN (protection)
OUT Night mode switching OUT
OUT Center unit power supply OUT
A-D IN Destination select input
A-D IN KEY 1 input
- Connected to VSS (GND)
A-D IN KEY O input
- A-D, D-A reference voltage input
- Connected to VCC terminal (+5V)
Ω
+2k +1.8k
— 1.111 — 1.667 — 2.222
VOLUME VOLUME NO KEY
N B
INPUT NO KEY NO KEY
51k
3.889 — 4.444
J model
(Japanese)
Function
[4.0-5.0V:SW provided, 0-2.0V:SW protection ON]
+2.4k +3.9k +5.6k
— 2.778 — 3.333
NO KEY NO KEY
NO KEY NO KEY
Ω
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
(VEE internal pull-down)
[-29V]
[0 — VREF]
[0 — VREF]
[0:ON]
[1:ON]
[Pull-up with 10kΩ > VREF]
[Pull-up with 10kΩ > VREF]
[Pull-up with 10kΩ > VREF]
[— VCC]
+10k +24k
— 3.889
— 4.444
NO KEY
NO KEY
NO KEY NO KEY