zl50018gag2 Zarlink Semiconductor, zl50018gag2 Datasheet - Page 75
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zl50018gag2
Manufacturer Part Number
zl50018gag2
Description
2 K Digital Switch With Enhanced Stratum 3 Dpll
Manufacturer
Zarlink Semiconductor
Datasheet
1.ZL50018GAG2.pdf
(136 pages)
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Part Number:
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External Read/Write Address: 004B
15 - 8
Reset Value: 0000
6 - 5
4 - 2
Bit
15
7
0
14
0
PMS2 - 0
PRS1 - 0
Unused
Name
MTR
H
13
0
Reserved. In normal functional mode, these bits MUST be set to zero.
MTIE Reset: When this bit is low, the MTIE circuit applies a phase offset between the
reference input clock and the DPLL output clock and the phase offset value is
maintained. When this bit is high, MTIE circuit is in its reset state and the phase offset
value is reset to zero, causing alignment of the DPLL output clocks to nearest edge of the
selected input reference.
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 Preference“ on page 40 for
more details.
12
Table 40 - Reference Change Control Register (RCCR) Bits
0
H
11
0
PMS2
10
0
0
0
0
1
1
0
PRS1
9
0
110 - 111
Zarlink Semiconductor Inc.
0
0
1
1
PMS1
0
0
1
1
0
0
ZL50018
8
0
PRS0
75
0
1
0
1
PMS0
MTR
7
0
1
0
1
0
1
Description
PREFERRED REFERENCE
PRS
6
1
Preference as per the setting of
SELECTION
PREFERENCE MODE
PRS
5
0
the PRS1 - 0 bits
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
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