Yamaha RX-V671 Service Manual page 77

• Microprocessor extended port
IC84, 85: TC74VHC273FT (DIGITAL P.C.B.)
Octal D-type flip-flop with clear
CLR 1
Q1 2
D1 3
D2 4
5
Q2
6
Q3
D3 7
D4 8
9
Q4
GND 10
Inputs Output
CLR D CK
L X X
H L
H H
H X
IC84 (D-FF12)
Pin R32C external
Function Name
No. bus data
2 D[8] HDMI_PON
5 D[9] HRX_N_RST
6 D[10] HTX1_N_RST
9 D[11] HTX2_N_RST
12 D[12] FROM_N_RST
15 D[13] HTX_AUSEL
16 D[14] HAU_N_OE
19 D[15] VIDI2C_ON
IC85 (D-FF11)
Pin R32C external
Function Name
No. bus data
2 D[0] HEQ_N_RST
5 D[1] VDEC_N_RST
6 D[2] USB_OC_FLG
9 D[3] HRX_VSEL
12 D[4] F_HEQ_CE
15 D[5] VID_PON
16 D[6] +3.3D_PON
19 D[7] PRY
20 V CC
19 Q8
D1
D8
18 3
1
CLR
17 D7
D R
16
Q7
CK Q
15 Q6
11
CK
14
D6
13 D5
12 Q5
CK
11
Function
Q
Clear
L
L
−
−
H
Q n No Change
Related Power Supply
ON OFF
I/O Logic I/O
O H act O
O L act O
O L act O
O L act O
O L act O
O H HRX O
O L act O
O H act O
Related Power Supply
ON OFF
I/O Logic I/O
O L act O
O L act O
O H act O
O L DEC O
O H act O
O H act O
O H act O
O H act O
D2 D3 D4 D5
4 7 8 13
D R D R D R
CK Q CK Q CK Q
2 5 6 9
Q1 Q2 Q3 Q4
Detail of Function
Logic
Low HDMI power supply (Necessary for DSP, AVIDEO drive)
Low HDMI RX reset
Low HDMI TX reset
Low HDMI TX2 reset
Low FLASH reset
Low HDMI TX sound select
Low HDMI to DIR sound output enable
Low I2C line switch to video device
Detail of Function
Logic
Low HDMI switcher reset
Low Video decoder reset
Low USB overcurrent detection flag R32C to BF
Low Video decoder to scaler line enable
Low Front HDMI EQ chip enable
Low Video power supply
Low OR of HDMI_PON, DSP_PON, NET_USB_PON
Low Power relay
RX-V671/HTR-6064/RX-A710
D6 D7 D8
14 17 18
D R D R D R D R
CK Q CK Q CK Q CK Q
12 15 16 19
Q5 Q6 Q7 Q8
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