MC145152-2 Freescale Semiconductor, Inc, MC145152-2 Datasheet - Page 8

• Manufacturer Part Number: MC145152-2
• Description: Parallel-input Pll Frequency Synthesizer
• Manufacturer: Freescale Semiconductor, Inc

MC145152-2 Parallel-Input (Interfaces with Dual-Modulus Prescalers)
2.2
2.2.1
f
Frequency Input (Pin 1)
Input to the positive edge triggered ÷ N and ÷ A counters. f
prescaler and is AC coupled into the device. For larger amplitude signals (standard CMOS logic levels)
DC coupling may be used.
RA0, RA1, RA2
Reference Address Inputs (Pins 4, 5, 6)
These three inputs establish a code defining one of eight possible divide values for the total reference
divider. The total reference divide values are as follows:
8
in
NOTE: N0 - N9, A0 - A5, and RA0 - RA2 have pull-up resistors that are not shown.
OSC
OSC
out
f
in
Pin Descriptions
in
Input Pins
RA2
RA1
RA0
6-BIT
MC145151-2 and MC145152-2 Technical Data, Rev. 5
A5
÷
Figure 6. MC145152-2 Block Diagram
RA2
A COUNTER
A3 A2
Reference Address Code
0
0
0
0
1
1
1
1
12 x 8 ROM REFERENCE DECODER
A0
12-BIT
RA1
0
0
1
1
0
0
1
1
CONTROL
÷
LOGIC
R COUNTER
N0
12
RA0
10-BIT
0
1
0
1
0
1
0
1
N2
in
÷
N4 N5
is typically derived from a dual-modulus
N COUNTER
Divide
Value
Total
1024
1160
2048
128
256
512
64
8
N7
N9
DETECTOR
DETECT
PHASE
Freescale Semiconductor
LOCK
LD
MC
φ
φ
V
R