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: 131/170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
119
actual code values be verified (and modified) on the bench with the device
driving the actual transformer and termination expected in the application.
Figure 19 shows the D/A codes necessary for XPLS to drive a DSX-1 pulse
using a Pulse Engineering 1:1.36 ± 5% turns ratio step-up transformer (PE #
64952, or PE 65774) and 0-110ft of 22 AWG twisted pair cable. (These code
values are the same as those contained in the internal XPLS ROM for the 0-110
ft. waveform template, i.e. SM=1, ILS[2:0]=000.)
Figure 19
- CODE Register Sequence For 0-110 feet Build-out
TXTIP-
TXRING
0
A
1
9
2
9
3
9
4
3
5
2
6
1
7
0
CODE Reg#……
Contents (hex)…
To program the XPLS CODE registers for a custom waveform template, the
following sequence should be used:
1. Set the RPT bit in the XPLS Configuration register (02CH, 06CH, 0ACH,
0ECH) to logic 0.
2. Write the CODE register address (0-7) in the XPLS CODE Indirect Address
register (register 02EH, 06EH, 0AEH, 0EEH).
3. Write the desired code value to the XPLS CODE Indirect Data register
(register 02FH, 06FH, 0AFH, 0EFH).
4. Repeat steps 2 and 3 until all the CODE registers are written.
5. Enable XPLS to generate the new waveform by setting RPT to logic 1.
The contents of the XPLS CODE registers can be reviewed at any time by using
the following sequence:
1. Write the CODE register address (0-7) in the XPLS CODE Indirect Address
register (register 02EH, 06EH, 0AEH, 0EEH).
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