Microprocessor Adc Select Port - Yamaha RX-V363 Service Manual

RX-V363/HTR-6130

• Microprocessor ADC select port

IC401: ADC084S021CIMM (DSP P.C.B.)
4-channel, 200 kSPS, 8-bit A/D converter
IN1
IN2
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
V [V]
KEY0 (7 pin) SCENE 1
KEY1 (6 pin) SCENE 3
IC402, IC403: SN74LV4051APWR (DSP P.C.B.)
8-channel analog multiplexers/demultiplexers
11
A
10
B
9
C
6
INH
46
8-Bit
SUCCESSIVE
MUX T/H
APPROXIMATION
ADC
GND
CONTROL
LOGIC
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
+1.0 k +1.5 k
0.3 0.55 0.86
PROGRAM PROGRAM
SCENE 2
<
SCENE 4 DIRECT
V A
CS 1
V A 2
GND
GND 3
IN4 4
IN3 5
SCLK
CS
DIN
DOUT
Detail of Function
+2.2 k +3.3 k +4.7 k
1.2 1.56 1.91
TONE
STRAIGHT
> CONTROL
AUDIO
INPUT < INPUT >
SELECT
3
COM
13
Y0
14
Y1
15
Y2
12
Y3
Y4 1 16
Y6 2 15
1
COM
3 14
Y4
Y7 4 13
5 5
Y5 12
Y5
INH 6 11
10
GND 7
2
Y6
8 9
GND
4
Y7
10 SCLK
DOUT
9
ADC084S021
8 DIN
7 IN1
6 IN2
+4.7 k +6.8 k +10.0 k
2.14 2.36 2.57
SEARCH
FM/AM A/B/C/D/E
MODE
PRESET/ PRESET/
MEMORY
TUNING < TUNING >
INPUTS ON
V
CC
CHANNEL
INH C B A
Y2
L L L L Y0
Y1
L L L H Y1
Y0
L L H L Y2
Y3
L L H H Y3
A
L H L L Y4
B
L H L H Y5
C
L H H L Y6
L H H H Y7
H X X X None
+22.0 k
2.81
SPEAKERS
TUNING