PEF 20550 H V2.1 Infineon Technologies, PEF 20550 H V2.1 Datasheet - Page 234

• Manufacturer Part Number: PEF 20550 H V2.1
• Description: IC INTERFACE CTRLR PCM MQFP80
• Manufacturer: Infineon Technologies
• Series: ELIC®r

Specifications of PEF 20550 H V2.1

• Function: Line Card Controller
• Interface: ISDN, PCM
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 15mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-SQFP
• Includes: Change Detection, Power-Up Reset Generation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEF20550HV2.1XT; PEF20550HV21XP; SP000007794; SP000007795

2) In CFI mode 0, with a frame consisting of 32 timeslots, the following timing
The CBSR:CUS bits must therefore be set to ‘0100’, according to figure 77.
The complete value for CBSR is: CBSR = 04
Finally, the CMD2 register bits must be set to
FC2 … 0 = 011, COC = 0, CXF = 1, CRR = 0, CBN9 … 8 = 00, i.e. CMD2 = 68
Figure 81
Timing Signals for CFI Bit Shift Example 2
The framing signal source FSC shall mark CFI timeslot 4, bit 1 in downstream direction
and CFI timeslot 0, bit 5 in upstream direction. The data shall be transmitted with the
rising CRCL edge and sampled with the rising CRCL edge. The FSC signal shall be
sampled with the rising DCL edge.
The following CFI register values result:
Since FSC marks the downstream bit 1, the CBSR:CDS bits must be set to ‘000’,
according to table 34.
If the CBSR:CDS bits are set to ‘000’, FSC marks the timeslot TSN – 1, according to
table 34.
FSC shall mark CFI timeslot 4, i.e. TSN – 1 = 4, or TSN = 4 + 1 = 5
Semiconductor Group
FSC
DCL
DD#
Required
Offset in
Downstream
Direction
Required
Offset in
Upstream
Direction
DU#
relationship between the framing signal source FSC and the data signals is required:
Bit 3
Bit 7
Bit 2
0
Time-Slot 4
Bit 6
1
Start of Internal Frame
TS4,
Bit 1
Bit 1
TS0, Bit 5
Bit 5
Time-Slot 0
Bit 0
234
H
Bit 4
Bit 7
Bit 3
Time-Slot 5
Bit 6
Bit 2
Application Hints
Bit 5
CMD2
CMD1 CSM = 1
CFI Mode 0
CMD2 CRR = 1
PEB 20550
PEF 20550
:
:
:
CXF
H
ITT08060
=
01.96
0