Mitsubishi SD200U Service Manual page 92

PCB-SIGNAL(2/4)
IC201 NC7SZ14P5X
1 5
FUNCTION TABLE
V
NC
CC
2
A
3 4
GND Y
H = HIGH Logic Level
L = LOW Logic Level
ICLK
FBIN
IC280 NC7SZ86P5X
1
A
2
B
3
GND
Y=A
Inputs Outputs
A Y
L H
H L
IC270 ICS570B
4
Phase
Detector,
1 2
S1
Change
S0 6
Pump, and
Loop Filter
5
divide by N
5 FUNCTION TABLE
Y=A B
Inputs Outputs
B
A
4
Y L L
L H
H L
H H
H = HIGH Logic Level
L = LOW Logic Level
IC202,IC203,IC204 HD74LVC245T
2
A0
3
A1
4
A2
5
A3
A
DATA
PORT
6
A4
7
A5
8
A6
9
A7
1
T/R
19
OE
Voltage
Output
Controlled
Buffer
Oscillator
÷
2
Output
Buffer
Y
L
H
H
L
B-2
TRUTH TABLE
IN
OE T/R
18
B0
L L B DATA
L H A DATA
17
B1
H X
H : HIGH LEVEL
16
B2
L : LOW LEVEL
X : DON'T CARE
15
B3
B
DATA
PORT
14
B4
13
B5
12
B6
11
B7
7
CLK
8
CLK/2
IC281 NC7SZ374P6X
1 6
OE
CP
CP
2 5
GND V
CC
D
Q
3 4
D Q
FUNCTION TABLE
Inputs Output
CP D OE Q
L L L
H L H
X L
Qn
H Z
X X
H = HIGH Logic Level
L = LOW Logic Level
Z = High Impedance
Qn = No change in data
X = Immaterial
OUT
A DATA
B DATA
ISOLATION