参数资料
型号: PM4314
厂商: PMC-SIERRA INC
元件分类: 数字传输电路
英文描述: QUAD T1/E1 LINE INTERFACE DEVICE
中文描述: DATACOM, PCM TRANSCEIVER, PQFP128
封装: 14 X 20 MM, PLASTIC, QFP-128
文件页数: 147/170页
文件大小: 823K
代理商: PM4314
PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
135
generate another line code violation, the LCVINS bit must be reset to logic 0 and
then set to logic 1 again.
Figure 28
- AMI Line Code Violation Insertion
CLK
UNIDAT
TXTIP
TXRING
CLK
UNIDAT
TXTIP
TXRING
V
LCVINS = 1 causes a
bipolar violation.
The effect of setting the LCVINS bit of the Diagnostics register (005H, 045H,
085H, and 0C5H) is shown in the above diagrams. The signals CLK and UNIDAT
are not actual signals but are used as reference guidelines and TXTIP[X] and
TXRING[X] have been shown as square NRZ pulses for illustrative purposes.
CLK shows the reference 1x clock used to generate the TXTIP[X] and
TXRING[X] outputs. UNIDAT is the unipolar data stream that is AMI encoded to
generate the TXTIP[X] and TXRING[X] bipolar output streams. Setting LCVINS
to a logic 1 generates one line code violation by causing the next pulse to be of
the same polarity as the previous pulse. Subsequent pulses will be of alternate
polarity. To generate another line code violation, the LCVINS bit must be reset to
logic 0 and then set to logic 1 again.
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