pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 205
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pef20550
Manufacturer Part Number
pef20550
Description
Extended Line Card Interface Controller Elic
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF20550.pdf
(407 pages)
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Table 28
Formulas to Calculate the PCM Frame Offset Upstream (TxD#)
PCM Mode
0
1, 3
2
Examples
1) In PCM mode 0, with a frame consisting of 32 timeslots, the following timing
Figure 62
Timing PCM Frame Offset for Example 1
Semiconductor Group
PFS
PDC
TxD#
RxD#
Required
Time-Slot
and Bit
Offset
relationship between the framing signal and the data signals is required:
256
Offset Upstream, POFU, PCSR
0
OFU9 … 2 = (BNU + 23)
OFU9 … 1 = (BNU + 47)
OFU9 … 0 = (BNU + 95)
Bit 7
1
1
Start of Internal Frame
BNU
BND
Bit 6
2
Bit 5
3
Bit 4
Time-Slot 0
4
Bit 3
mod BPF
mod BPF
mod BPF
5
205
Bit 2
6
Bit 1
7
Bit 0
8
Remarks
PCSR:OFU1 … 0 = 0
PCSR:OFU0 = 0
–
9
10
Application Hints
PCSR
PCSR
PMOD PSM = 0
PEB 20550
PEF 20550
:
:
:
URE
DRE = 0
ITT08041
=
1
01.96
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