Yamaha HTR-6230, Service Manual

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RX-V365/HTR-6230
RX-V365/HTR-6230
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OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
V
CC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
LE
OE
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LE
1D
C1
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1Q
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8D
C8
8D
8Q
IC204-IC206: SN74LV573APWR (DSP P.C.B.)
Octal 3-state D-latches with 3-state outputs
• Microprocessor extended port
IC204
IC205
Pin No. Port Name Function Name Detail of Function
1 /OE /EXPE Extended port enable
2 1D D00 Data bus 00
3 2D D01 Data bus 01
4 3D D02 Data bus 02
5 4D D03 Data bus 03
6 5D D04 Data bus 04
7 6D D05 Data bus 05
8 7D D06 Data bus 06
9 8D D07 Data bus 07
10 GND DGND Ground of external
11 LE LEEX1 Bank select 1
12 8Q /SPISEL3 CS for CODEC IC (IC301, DSP P.C.B.)
13 7Q ADSEL2 4ch ADC input select 2
14 6Q ADSEL1 4ch ADC input select 1
15 5Q ADSEL0 4ch ADC input select 0
16 4Q /CCBE SPI bus switch
17 3Q /CMT Center mute
18 2Q /SMT Surround mute
19 1Q /FMT Front mute
20 VCC EX3.3 Power supply
Pin No. Port Name Function Name Detail of Function
1 /OE /EXPE Extended port enable
2 1D D08 Data bus 08
3 2D D09 Data bus 09
4 3D D10 Data bus 10
5 4D D11 Data bus 11
6 5D D12 Data bus 12
7 6D D13 Data bus 13
8 7D D14 Data bus 14
9 8D D15 Data bus 15
10 GND DGND Ground of external
11 LE LEEX1 Bank select 1 (B, G, E, F models)
12 8Q CLKSEL/RDS_RST Reset for RDS (B, G, E, F models)
13 7Q SSEL3 SCENE select LED switch 3
14 6Q SSEL2 SCENE select LED switch 2
15 5Q SSEL1 SCENE select LED switch 1
16 4Q /IC_AK IC for CODEC IC (IC301, DSP P.C.B.) and VFD (IC201, OPERATION P.C.B.)
17 3Q /SPISEL4 CS for VFD (IC201, OPERATION P.C.B.)
18 2Q /3.3SW +3.3S switch
19 1Q PRY Power relay
20 VCC EX3.3 Power supply