MT9042CPR Zarlink Semiconductor, Inc., MT9042CPR Datasheet - Page 9

• Manufacturer Part Number: MT9042CPR
• Description: Dual Reference Frequency Selectable Digital PLL with Multiple Clock Outputs for T1/E1 (ITU-T G.812 type IV) and Stratum (3, 4, 4E) Applications
• Manufacturer: Zarlink Semiconductor, Inc.

Legend:
-
/
MTIE
Refer to Manual Control State Diagram for state changes to and from Auto-Holdover State
MS2
NOTES:
(XXX)
{A}
Movement to Normal State from any
state requires a valid input signal
0
0
0
0
0
1
State change occurs with TIE Corrector Circuit
Not Valid
No Change
MS2 MS1 RSEL
Invalid Reference Signal
MS1
Input Controls
0
0
0
1
1
0
Description
Primary
Normal
(000)
S1
RSEL
(GTi=0)
(GTi=1)
X
0
0
1
0
1
{A}
GTi
X
X
X
X
0
1
Auto-Holdover
Figure 7 - Manual Control State Diagram
Holdover
Primary
Primary
Table 4 - Manual Control State Table
(000)
(010)
S1A
S1H
Phase Re-Alignment
Phase Continuity Maintained (without TIE Corrector Circuit)
Phase Continuity Maintained (with TIE Corrector Circuit)
Freerun
S0
S1
S1
S2
/
/
-
Freerun
(10X)
S0
S2 MTIE
Normal
(PRI)
S1H
S2H
S1
S0
-
-
Auto-Holdover
Secondary
Secondary
Holdover
S1 MTIE
S1 MTIE
Normal
(001)
(011)
S2A
S2H
(SEC)
S2H
S2
S0
State
-
/
{A}
Holdover
S1 MTIE
S2 MTIE
(PRI)
S1H
S1
S0
-
/
Secondary
Normal
MT9042C
(001)
S2
Holdover
S1 MTIE
S1 MTIE
S2 MTIE
(SEC)
S2H
S0
/
-
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