pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 204
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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Figure 61
PCM Interface Framing for PMOD:PSM = 1
The formulas given in table 27 and table 28 apply for calculating the values to be
programmed to the offset registers (OFD, OFU) given the desired bit number (BND,
BNU) to be marked. BPF denotes the actual number of bits constituting a frame.
Table 27
Formulas to Calculate the PCM Frame Offset Downstream (RxD#)
PCM Mode Offset Downstream, POFD, PCSR
0
1, 3
2
Semiconductor Group
PFS
PDC
TxD#
TxD#
RxD#
RxD#
TxD#
TxD#
RxD#
RxD#
OFD9 … 2 = (BND – 17 + BPF)
OFD9 … 1 = (BND – 33 + BPF)
OFD9 … 0 = (BND – 65 + BPF)
1st Bit
1st Bit
1st Bit
1st Bit
1st Bit
2nd Bit
2nd Bit
1st Bit
1st Bit
2nd Bit 3rd Bit
2nd Bit
1st Bit
3rd Bit
3rd Bit
2nd Bit
3rd Bit
2nd Bit
2nd Bit
...
...
2nd Bit
...
...
...
...
3rd Bit
...
...
3rd Bit
3rd Bit
204
3rd Bit
mod BPF
mod BPF
mod BPF
...
...
...
Remarks
PCSR:OFD1 … 0 = 0
PCSR:OFD0 = 0
–
PMOD
PMOD PCR = 0,
Conditions:
PMOD :
PMOD :
PMOD :
PMOD :
PMOD
PMOD
PMOD
:
:
:
:
:
Application Hints
PSM
PCR
PCR = 0,
PCR
PCR
PCR = 1,
PCR
PCR = 1,
=
=
=
=
=
0,
0,
1
1,
1,
PEB 20550
PEF 20550
PCSR :
PCSR
PCSR
PCSR
PCSR
PCSR :
PCSR :
PCSR :
:
:
:
:
URE
URE = 0
DRE
DRE = 1
URE = 1
URE
DRE = 0
DRE
ITT08040
01.96
1 =
=
=
=
0
0
1
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