Pioneer C-AX10 Service Manual page 97

TC7WT74FU (DSP ASSY : IC1605)
• D-type Flip Flop with Present and Clear
•
Pin Arrangement (Top view)
1 C
CK
D
D 2
Q 3
GND 4
TC74VHC4040FT (DSP ASSY : IC1606, IC1623)
• 12-stage Ripple-carry Binary Counter
•
Block Diagram
D
CK 10
CK
R
CLR 11
R
CK
Q
1
Q12
8 Vcc
S 7 PR
6
CLR
R
5 Q
Q1 Q2 Q3
9 7 6
D D
Q Q Q
CK CK
R R
R R
CK CK
Q Q
D D D
15 14 12
Q11 Q10 Q9
•
Truth Table
INPUTS OUTPUTS
CLR PR D CK Q Q
L H X X L H
H L X X H L
L L X X H H
H H L L H
H H H H L
H H X Qn Qn NO CHANGE
X : Don't Care
Q4 Q5
5 3
D D D
Q Q Q
CK CK CK
R R R
R R R
CK CK CK
Q Q Q
D D D
13 4
Q8 Q7
C-AX10
FUNCTION
CLEAR
PRESET
•
Truth Table
Q6
2
CK CLR Output State
X H All outputs "L"
L Don't change
L Go to the next state
X : Don't Care
97