參數(shù)資料
型號： T8100A
英文描述： H.100/H.110 Interface and Time-Slot Interchangers
中文描述： H.100/H.110接口和時隙Interchangers
文件頁數(shù)： 3/112頁
文件大?。?/td> 1408K
代理商： T8100A
Advisory
November 1999, Rev. 4
Exceptions and Clarifications for Ambassador
TM
T8100A, T8102,
and T8105 H.100/H.110 Interface and Time-Slot Interchangers
Device Exceptions
Users of the AmbassadorT8100A, T8102, and
T8105 devices should be aware of the following
device operation exceptions and the associated solu-
tions:
1. When a compatibility clock is programmed as a
slave, and the board generates A or B clocks, the
watchdog will indicate an error on the A or B
clocks it generates. The error will be reported
even though the generated clocks are good.
Workaround
: Use the master board to accurately
monitor the clocks.
2. When a compatibility clock is programmed as a
slave, and the clock selector is set to A or B
clocks with slide phase alignment, the slave board
does not lock and the generated frame continues
sliding.
Workaround
: None.
Product Status
: Device redesign required.
3. Models of the AmbassadorT8100A, T8102, and
T8105 devices exhibit intermittent corrupted time-
slot data. H.100 stream 0 time slot 1 (for outgoing
data) and H.100 stream 1 time slot 127 (for
incoming data at 8.192 MHz, time slot 63 for
4.096 MHz, and time slot 31 for 2.048 MHz) are
the most likely stream/time slots to be corrupted.
However, intermittent time-slot corruption may
occur in other stream/time slots.
The time-slot corruption problem occurs when a
T810x device is used in slave-timing mode, as
described in Section 2.5 of the Data Sheet. In a
typical slave timing application, a T810x device is
set to phase align to an incoming bitclock/frame
reference pair (i.e., slave to CT_C8_A/FRAME_A,
CT_C8_B/FRAME_B, C4/FR_COMP etc.). Both
SNAP and SLIDE alignment modes are affected.
Devices that don't require phase alignment to
these clocks (i.e., the primary bus master) should
not exhibit stream data corruption.
Root Cause
: The analog PLL has an error which
introduces an unexpected 6 ns—7 ns of skew.
This skew causes the phase alignment circuit to
fail intermittently, whether in the SNAP or SLIDE
mode. An intermittent SLIDE produces an internal
frame signal that does not align and phase lock
with an incoming frame reference. An intermittent
SNAP forces a reset of the internal counters and
results in corrupted stream data.
Workaround
: There is no workaround. The solu-
tion is a fix to the silicon. Samples are scheduled
for release in August 1999.
4. Version 2 models of the AmbassadorT8100A,
T8102, and T8105 devices can exhibit intermittent
corrupted time slot data in one specific configura-
tion. The problem occurs when a master T810x
device is given an 8 kHz signal as the timing
reference and multiplies it up to 2.048 MHz or
4.096 MHz in the digital PLL (DPLL). The DPLL
introduces sufficient jitter on the A or B master
output clocks that slave devices falsely interpret
as a loss of sync and either snap or slide align to
this false sync indication. This, in turn, causes
corruption of time slot data. Any master timing ref-
erence that does not make use of the DPLL does
not exhibit the problem.
Workaround
: Do not use an 8 kHz signal as the A
or B master timing reference, since this requires
use of the DPLL. Instead, supply a jitter-free tim-
ing reference at any of the other allowable fre-
quencies (2.048, 4.096, 8.192 or 16.384 MHz).
Product Status
: The solution is a fix to the
silicon.
相關(guān)PDF資料
PDF描述
T8102A H.100/H.110 Interface and Time-Slot Interchangers
T8105A H.100/H.110 Interface and Time-Slot Interchangers
T8100 H.100/H.110 Interface and Time-Slot Interchanger
T8110 Version History
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T8100A-BAL 制造商:Alcatel-Lucent 功能描述:ELECTRONIC COMPONENT
T8100A-BAL4DB 制造商:AGERE 功能描述:
T8100-D 制造商:GE Sensing & Inspection Technologies 功能描述:CO2/TEMP SENS WALL MNT DUAL OUT
T8100-E 制造商:GE Sensing & Inspection Technologies 功能描述:TRANSMITTER, CO2, HUMIDITY, TEMP 制造商:GE MEASUREMENT & CONTROL 功能描述:TRANSMITTER, CO2, HUMIDITY, TEMP; Plug Type:- ;RoHS Compliant: Yes 制造商:GE MEASUREMENT & CONTROL/GE SENSING 功能描述:TRANSMITTER, CO2, HUMIDITY, TEMP; Plug Type:- ;RoHS Compliant: Yes
T8100-E-D 制造商:GE Sensing & Inspection Technologies 功能描述:TRANSMITTER, CO2, HUMIDITY, TEMP 制造商:GE MEASUREMENT & CONTROL 功能描述:TRANSMITTER, CO2, HUMIDITY, TEMP; Plug Type:- ;RoHS Compliant: Yes 制造商:GE MEASUREMENT & CONTROL/GE SENSING 功能描述:TRANSMITTER, CO2, HUMIDITY, TEMP; Plug Type:- ;RoHS Compliant: Yes
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