Yamaha HTR-6230, Service Manual

Page: 47 / 99

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