Yamaha RX-V667 Service Manual page 75

IC904, 905: TC74VHC273FT (DIGITAL P.C.B.)
Octal D-type flip-flop with clear
CLR 1
Q1 2
D1
3
D2 4
Q2 5
Q3 6
7
D3
D4 8
9
Q4
GND 10
Inputs Output
CLR D CK
L X X
H L
H H
H X Q n
Pin Port Use Function
No. Name Port Name
2 D0 Q1 SPRY_5CH
SPRY_
5 D1 Q2
SB&BA
SPRY_
6 D2 Q3
Z2&FP
9 D3 Q4 HPRY
12 D4 Q5 SP_IMP
15 D5 Q6 PRY
DIR1_N_
16 D6 Q7
RST
DSP1_N_
19 D7 Q8
RST
DIR1_N_
2 D8 Q1
CS
DAC1_N_
5 D9 Q2
CS
ADC_N_
6 D10 Q3
RST
DOCK_
9 D11 Q4
PON
12 D12 Q5 FL_N_RST
15 D13 Q6 FL_N_CS
16 D14 Q7 UAW_PON
19 D15 Q8 PD_LED
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
11 CK
Function
Q
Clear
L
L −
−
H
No Change
Related power supply
Terminal
Processing
PRY
PRY
PRY
PRY
PRY
PRY
DSP_PON
DSP_PON
DSP_PON
DSP_PON
DSP_PON
DOCK_
PON
DSP_PON
DSP_PON
UAW_PON
PRY
D2 D3 D4
4 7 8 13
D R D R D R
CK Q CK Q CK Q
2 5 6 9
Q1 Q2 Q3 Q4
OFF ON
I/O Logic I/O Logic
D-FF(1)
O Low O H act SP relay 5CH (L, C, R, SRL, SRR)
O Low O H act SP relay Surround Back and Bi-Amp
O Low O H act SP relay Zone2 and Front Presence
O Low O H act HP relay
O Low O H 6Ω SP impedance change (± B voltage change)
O Low O H act Power relay
O Low O L act DIR1 reset
O Low O L act DSP1 reset
D-FF(2)
O Low O L act DIR1 chip select
O Low O L act DAC chip select
O Low O L act ADC reset (power down)
O Low O H act DOCK power supply
O Low O L act FLD reset
O Low O L act FLD chip select
O Low O H act UAW power supply
O Low O H act Pure Direct LED
RX-V667/HTR-6063/RX-A700
D5 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
Q5 Q6 Q7
Detail of Function
19
Q8
75