mc145170-2 Freescale Semiconductor, Inc, mc145170-2 Datasheet - Page 17

• Manufacturer Part Number: mc145170-2
• Description: Pll Frequency Synthesizer With Serial Interface
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
V
V
*At this point, when both f
Note: The PD
H
L
= Low voltage level
= High voltage level
* At this point, the two new bytes are transferred to the N register and stored. No other registers are affected. In addition, the N
and R counters are jam-loaded and begin counting down together.
and the voltage at that pin is determined by the low-pass filter capacitor. PDout, φ
low; see
ENB
CLK
D
Reference
OSC
in
Feedback
(f
in
in
PD
out
÷ R
÷ N
LD
Figure 16
φ
φ
out
f
f
R
V
R
V
generates error pulses during out-of-lock conditions. When locked in phase and frequency, the output is high impedance
Figure 19. Phase/Frequency Detector and Lock Detector Output Waveforms
N15
MSB
Figure 18. N Register Access and Format (16 Clock Cycles Are Used)
1
R
for POL.
N14
and f
2
V
N13
are in phase, both the sinking and sourcing output FETs are turned on for a very short internal.
3
N12
4
N11
MC145170-2 Technical Data, Rev. 5
5
N10
6
N9
Hexadecimal Value
0
0
0
0
0
0
0
0
0
0
0
F
F
.
.
.
.
.
.
7
0
0
0
0
0
0
0
0
0
0
0
F
F
.
.
.
.
.
.
N8
8
0
0
0
0
2
2
2
2
2
2
2
F
F
.
.
.
.
.
.
N7
A
B
E
0
1
2
3
5
6
7
8
9
F
.
.
.
.
.
.
9
Not Allowed
Not Allowed
Not Allowed
Not Allowed
Not Allowed
Not Allowed
Not Allowed
N Counter = ÷40
N Counter = ÷41
N Counter = ÷42
N Counter = ÷43
N Counter = ÷65,534
N Counter = ÷65,535
N6
10
N5
11
R
and φ
N4
12
V
are shown with the polarity bit (POL) =
N3
Decimal Equivalent
13
*
N2
14
N1
15
N0
LSB
V
V
V
V
V
High Impedance
V
V
V
V
V
V
V
H
L
H
L
H
L
H
L
H
L
H
L
16
Pin Connections
*
17