Yamaha CRX-040 Service Manual page 54

CRX-040/CRX-140/NS-BP80
Pin
Port Name
No.
91 P105/AN5/KI1
92 P104/AN4/KI0
93 P103/AN3
94 P102/AN2
95 P101/AN1
96 Avss
97 P100/AN0
98 Vref
99 Avcc
100 P97/Adtrg/Sin4
Model detection for AD port
Ohm (R407)
Ohm (R408)
V
A/D value (3.3 V = 255)
MODEL (92 pin)
Destination detection for A/D port
Destination (A/D) pull-up resistance 47 k-ohms
Ohm (R405)
V
A/D value (3.3 V = 255)
DEST (93 pin)
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
Ohm
V
A/D value (3.3 V = 255)
KEY0 (97 pin)
54
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I/O
Function
Name
(P.C.B.)
PS3_PRT AD AD AD
MODEL AD AD AD
DEST AD AD AD
PS2_PRT AD AD AD
PS1_PRT AD AD AD
Avss MCU MCU MCU
KEY0
AD AD AD
(74 pin and share)
Vref MCU MCU MCU
Avcc MCU MCU MCU
TUN_MISO SPI I I
I I I
–
100k
0 – 0.6
0 – 50
CRX-040
4.7k 18k
0 – 0.5 0.6 – 1.2
0 – 45 46 – 98
B A
0 + 6.8k
0 – 0.6 0.7 – 1.6
0 – 51 52 – 131
OPEN/CLOSE STOP
Detail of Function
Power source protection 3
Identification of models (CRX-040, CRX-140)
Identification of destination
Power source protection 2
Power source protection 1
Identification of front panel key
SPI data input
100k
–
2.6 – 3.3
205 – 255
CRX-140
47k 82k
1.3 – 1.8 1.9 – 2.4 2.5 – 3.0
99 – 145 146 – 187 188 – 235
J U
+ 2.7k + 5.5k (15k)
1.7 – 2.2 2.3 – 2.6 2.7 – 3.1
132 – 176 177 – 206 207 – 237
– INPUT PLAY/PAUSE
U, T, K, A, G, L, V, J models
B model
220k –
3.1 – 3.3
236 – 255
G T, K, L, V
+ 18k + 18k
2.7 – 3.1
207 – 237
PLAY/PAUSE