Microprocessor Adc Select Port - Yamaha RX-V365 Service Manual

•

Microprocessor ADC select port

IC401: ADC084S021CIMM (DSP P.C.B.)
4-channel, 200 kSPS, 8-bit A/D converter
IN1
IN2
MUX
IN3
IN4
Pin No. Port Name
1 /CS
2 VA
3 GND
4 IN4
5 IN3
6 IN2
7 IN1
8 DIN
9 DOUT
10 SCLK
Key input (A/D), pull-up resistance 10 k-ohms
Ohm [ohm] +1.0 k +1.0 k
V [V] 0.3 0.55
KEY0
SCENE 1 SCENE 2
(7 pin)
KEY1
SCENE 3 SCENE 4
(6 pin)
IC402, IC403: SN74LV4051APWR (DSP P.C.B.)
8-channel analog multiplexers/demultiplexers
11
A
10
B
9
C
6
INH
8-Bit V A
SUCCESSIVE
T/H
APPROXIMATION
GND
ADC
GND
SCLK
CS
CONTROL
LOGIC DIN
DOUT
Function Name
/SPISEL1 CS for microprocessor
VA +3.3S
DGND Ground of external
IN4 SPI bus COM (IC402)
IN3 SPI bus COM (IC403)
KEY1 Key input 1
KEY0 Key input 0
SPIMO Master output/slave input
SPIMI Master input/slave output
SPISCK SPI clock
+1.5 k +2.2 k +3.3 k
0.86 1.2 1.56
PROGRAM PROGRAM
STRAIGHT
< >
NIGHT – INPUT <
3
COM
13
Y0
14
Y1
15
Y2
12
Y3
1
Y4
5
Y5
2
Y6
4
Y7
CS 1 10 SCLK
DOUT
V A 2 9
ADC084S021
GND 3 8
IN4 4 7
IN3 5 6
Detail of Function
+4.7 k +4.7 k +6.8 k
1.91 2.14 2.36
TONE PRESET/
BAND
CONTROL TUNING
PRESET/ PRESET/
INPUT >
TUNING < TUNING >
INPUTS
Y4 1 16 V
CC
INH C B
Y6
2 15
Y2
L L
L
COM 3 14
Y1
L L L
Y7 4 13
Y0
L L H
Y5 5 12
Y3
L L H
INH
6 11
A
L H L
7 10
GND B
L H L
9
8 C
GND
L H H
L H H
H X X
RX-V365/HTR-6230
DIN
IN1
IN2
+10.0 k +22.0 k
2.57 2.81
A/B/C/D/E SPEAKERS
MEMORY TUNING
ON
CHANNEL
A
L Y0
H Y1
L Y2
H Y3
L Y4
H Y5
L Y6
H Y7
X None
47