ZL50022
Data Sheet
External Read Only Address: 004CH
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
7
6
5
4
3
2
1
0
SLM
LST
RFR2
RFR1
RFR0
RES1
RES0
DPM1
DPM0
Bit
Name
Description
6 - 4
RFR2 - 0 Reference Frequency Indicator Bits
These bits represent the frequency of the selected reference indicated by the reference
bits (RES1 - 0) in this register.
Frequency of the Selected
RFR2
RFR1
RFR0
Reference
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
8 kHz
1.544 MHz
2.048 MHz
4.096 MHz
8.192 MHz
16.384 MHz
19.44MHz
Reserved
3 - 2
RES1 - 0 Reference Select Indicator Bits: These bits indicate which one of the four reference
inputs (REF0 - 3 pins) is being selected by the device.
RES1
RES0
Input Reference in use
0
0
1
1
0
1
0
1
REF 0
REF 1
REF 2
REF 3
1 - 0
DPM1 - 0 DPLL Timing Mode Status Bits:
These bits indicate the DPLL’s timing mode status.
DPM1
DPM0
DPLL Timing Mode State
0
0
1
1
0
1
0
1
MTIE
Normal
Holdover
Freerun
Table 37 - Reference Change Status Register (RCSR) Bits - Read Only (continued)
71
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
