Yamaha GX-505 Service Manual page 27

IC8 : M38199EF [CD/VCD P.C.B.]
µ
8 bit -COM (CD CPU)
Pin No. Port
92 PA5
93 PA4
94
PA3
95
PA2
96 PA1
97 PA0
98 VEE
99 AVSS
100 VREF
IC8 : M38199EF [INPUT P.C.B.]
µ
8 bit -COM (SYSTEM CPU)
P87/SEG15
P86/SEG14
P85/SEG13
P84/SEG12
P83/SEG11
P82/SEG10
P81/SEG9
P80/SEG8
PA7/SEG7
PA6/SEG6
VCC
PA5/SEG5
PA4/SEG4
PA3/SEG3
PA2/SEG2
PA1/SEG1
PA0/SEG0
VEE
AVSS
VREF
No. Port Name
1 AN7 MSEL
2 AN6 SPEIN
3 AN5 DSEL
4 AN4 KEY4
5 KEY3
AN3
6 AN2 KEY2
7 AN1 KEY1
8 AN0 KEY0
9 PB3
10 DA FAN
11 AN15 THER
12 SCLK3 FLCLK
13 SO3 FLDATA
14 SI3
15 AN11 VPRT
Name I/O
O Not used
O Not used
O
Not used
O
Not used
O Not used
O Not used
VEE GND
AVSS GND (VSS)
VREF +5V (VCC)
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
I MODEL/PRO LOGIC MODE DETECT
I SPECTRUM ANALYZER (BA3835F) IN (A-D)
I MARKET SELECT IN
I KEY 4 IN
I KEY 3 IN
I KEY 2 IN
I KEY 1 IN
I KEY 0 IN
OPEN
O FAN CONTROL OUT
I AMP THERMAL DETECT
O SERIAL CLOCK FOR FL DRIVER M66004
O SERIAL OUT FOR FL DRIVER M66004
OPEN
I ABNORMAL VOLTAGE DETECT
GX-505/GX-505VCD
Function
50 P16/DIG14
49 P17/DIG15
48 P20/DIG16
47 P21/DIG17
46 P22/DIG18
45 P23/DIG19
44
P24
43
P25
42
P26
41
P27
40 VSS
39
X OUT
38 X IN
37 PB0/XC OUT
36 PB1/XC IN
35 RESET
34 P40/INT0
33 P41
32
P42/INT2
31
P43/INT3
Function
(A-D)
(A-D)
(A-D)
(A-D)
(A-D)
(A-D)
(A-D)
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