Yamaha RX-V461 Service Manual page 36

RX-V461/HTR-6040/RX-V461DAB
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• Microprocessor extended port
IC204-IC207: SN74LV573APWR (DSP P.C.B.)
Octal 3-state D-latches with 3-state outputs
IC204
Pin No. Port Name
1 /OE
2 1D
3 2D
4 3D
5 4D
6 5D
7 6D
8 7D
9 8D
10 GND
TE 11 LE
L 13942296513
12 8Q
13 7Q
14 6Q
15 5Q
16 4Q
17 3Q
18 2Q
19 1Q
20 VCC
IC205
Pin No. Port Name
1 /OE
2 1D
3 2D
4 3D
5 4D
6 5D
7 6D
8 7D
9 8D
10 GND
11 LE
12 8Q
13 7Q
14 6Q
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15 5Q
16 4Q
17 3Q
.
18 2Q
19 1Q
20 VCC
36
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1
OE
11
LE
C1
2
1D
1D
C8
9
8D
8D
Function Name
/EXPE Extended port enable
D00 Data bus 00
D01 Data bus 01
D02 Data bus 02
D03 Data bus 03
D04 Data bus 04
D05 Data bus 05
D06 Data bus 06
D07 Data bus 07
DGND Ground of external
LEEX1 Bank select 1
/SPISEL3 CS for CODEC IC (IC301, DSP P.C.B.)
ADSEL2 4ch ADC input select 2
ADSEL1 4ch ADC input select 1
ADSEL0 4ch ADC input select 0
/CCBE SPI bus switch
/CMT Center mute
/SMT Surround mute
/FMT Front mute
EX3.3 Power supply
Function Name
/EXPE Extended port enable
D08 Data bus 08
D09 Data bus 09
D10 Data bus 10
D11 Data bus 11
D12 Data bus 12
D13 Data bus 13
D14 Data bus 14
D15 Data bus 15
DGND Ground of external
LEEX1 Bank select 1
Ex1-15/RDS_RST RDS reset (B, G, E models)
SSEL3 SCENE select LED switch 3
SSEL2 SCENE select LED switch 2
SSEL1 SCENE select LED switch 1
IC for CODEC IC (IC301, DSP P.C.B.), VFD (IC201, OPERATION P.C.B.) and
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/IC_AK
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USB (IC601, DSP P.C.B.) (T, G, E models)
/SPISEL4 CS for VFD (IC201, OPERATION P.C.B.)
i
/3.3SW +3.3S switch
PRY Power relay
EX3.3 Power supply
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2 9
8
OE 1 20 V
CC
1D 2 19
1Q
2D
3 18
2Q
19
3D 4 17
1Q
3Q
5 16
4D
4Q
5D 6 15
5Q
6D 7 14
6Q
7D 8 13
7Q
9 12
8D 8Q
12
GND 10 11 LE
8Q
Detail of Function
Q Q
3 6 7 1 3 1 5
Detail of Function
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9