參數(shù)資料
型號(hào)： ZL30410QCC
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 數(shù)字傳輸電路
英文描述： CONN SOCKET R/A 4R0W 24POS SLD
中文描述： ATM/SONET/SDH SUPPORT CIRCUIT, PQFP80
封裝： 14 X 14 MM, 1.40 MM HEIGHT, MS-026BEC, LQFP-80
文件頁(yè)數(shù)： 17/38頁(yè)
文件大?。?/td> 400K
代理商： ZL30410QCC
ZL30410
Data Sheet
17
Zarlink Semiconductor Inc.
Figure 8 - Transition from Free-run to Normal mode
4.1.2 Single Reference Operation: NORMAL --> AUTO HOLDOVER --> NORMAL
The NORMAL to AUTO-HOLDOVER to NORMAL transition will usually happen when the Line Card loses its single
reference clock unexpectedly. The sequence starts with the reference clock transitioning from OK --> FAIL at a time
when ZL30410 operates in Normal mode (as is shown in Figure 10). This failure is detected by the active
Acquisition PLL based on the following FAIL criteria:
- Frequency offset on 8 kHz, 1.544 MHz, 2.048 MHz and 19.44 MHz reference clocks exceeds ±30000
ppm (±3%).
- Single phase hit on 1.544 MHz, 2.048 MHz and 19.44 MHz exceeds half of the cycle of the reference
clock.
After detecting any of these anomalies on a reference clock the Acquisition PLL will switch itself into Holdover mode
forcing the Core PLL to automatically switch into the Auto Holdover state. This condition is flagged by LOCK = 0
and HOLDOVER = 1.
Figure 9 - Automatic entry into Auto Holdover State and recovery into Normal mode
Ref: OK AND
MS2,MS1=00
{AUTO}
Ref: OK-->FAIL AND
MS2,MS1=00
{AUTO}
MS2,MS1=01 OR
RefSel change
MS2,MS1=10 forces
unconditional return from
any state to Free-run
RESET=1
MS2,MS1=00
OR
MS2,MS1=01
RefSel Change
OR
MS2,MS1=01
Ref: FAIL-->OK AND
MS2,MS1=00
{AUTO}
RESET
FREE-
RUN
10
HOLD-
OVER
01
NORMAL
00
AUTO
HOLD-
OVER
Ref: OK AND
MS2,MS1=00
{AUTO}
Ref: OK-->FAIL AND
MS2,MS1=00
{AUTO}
MS2,MS1=01 OR
RefSel change
MS2,MS1=10 forces
unconditional return from
any state to Free-run
RESET=1
MS2,MS1=00
OR
MS2,MS1=01
RefSel Change
OR
MS2,MS1=01
Ref: FAIL-->OK AND
MS2,MS1=00
{AUTO}
RESET
FREE-
RUN
10
HOLD-
OVER
01
NORMAL
00
AUTO
HOLD-
OVER
相關(guān)PDF資料
PDF描述
ZL30414 SONET/SDH Clock Multiplier PLL
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ZL30415GGC SONET/SDH Clock Multiplier PLL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ZL30410QCC1 制造商:Microsemi Corporation 功能描述:
ZL30410QCG1 制造商:Microsemi Corporation 功能描述:IC SONET/SDH NETWORK ELEMENT PLL 制造商:Microsemi Corporation 功能描述:LEAD FREE SONET/SDH NETWORK ELEMENT PLL - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC PLL SONET/SDH/PDH 80LQFP 制造商:Microsemi Corporation 功能描述:IC PLL SONET/SDH/PDH 80LQFP
ZL30414 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Clock Multiplier PLL
ZL30414QGC 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Clock Multiplier PLL
ZL30414QGC1 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Clock Multiplier PLL
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