ZL50015GAC ZARLINK [Zarlink Semiconductor Inc], ZL50015GAC Datasheet - Page 70

• Manufacturer Part Number: ZL50015GAC
• Description: Enhanced 1 K Digital Switch with Stratum 4E DPLL
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

External Read/Write Address: 004B
Reset Value: 0000
6 - 5
4 - 2
1 - 0
Bit
15
0
14
0
PMS2 - 0
FDM1 - 0
PRS1 - 0
Name
H
13
Table 34 - Reference Change Control Register (RCCR) Bits (continued)
0
Preferred Reference Selection Bits
These bits select the preferred reference from one of the input references. They are used
only if the PMS2-0 bits are set to 001. Otherwise, these bits are ignored
Preference Mode Selection Bits
These bits select one of the preference modes:
If in automatic mode with a preferred reference (PMS2-0 = 001 and FDM1-0 = 00), the
automatic state machine will only switch between two references (as per Table 8). Please
see Section 12.1.3.2, “Automatic Reference Switching With Preferences“ on page 40 for
more details.
Force DPLL Timing Mode
These bits force the DPLL into one of the valid operation modes.
12
0
H
11
0
PMS2
10
0
0
0
0
1
1
0
PRS1
FDM1
0
0
1
1
0
0
1
1
110 - 111
9
0
Zarlink Semiconductor Inc.
PMS1
0
0
1
1
0
0
ZL50015
PRS0
FDM0
8
0
0
1
0
1
0
1
0
1
70
PMS0
MTR
7
0
1
0
1
0
1
Description
Preferred Reference Selection
DPLL TIMING Mode
PRS
6
1
Preference as per the setting
Automatic
Holdover
Freerun
Normal
of the PRS1 - 0 bits
PRS
Preference Mode
5
0
REF0
REF1
REF2
REF3
No Preference
Force REF0
Force REF1
Force REF2
Force REF3
Reserved
PMS
4
2
PMS
3
1
PMS
2
0
Data Sheet
FDM
1
1
FDM
0
0