PEF 2054 N V2.1 Infineon Technologies, PEF 2054 N V2.1 Datasheet - Page 213

• Manufacturer Part Number: PEF 2054 N V2.1
• Description: IC INTERFACE CTRLR PCM LCC-44
• Manufacturer: Infineon Technologies
• Series: EPICr

Specifications of PEF 2054 N V2.1

• Function: PCM Interface Controller
• Interface: ISDN, PCM
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 9.5mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-LCC
• Includes: Board Controller, Channel Switching
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEF2054NV2.1XT; PEF2054NV21XK; SP000057916; SP000075438

Figure 75
Access to PCM and CFI Data Using the Synchronous Transfer Utility
In upstream transmit direction (PCM interface output), it is necessary to assure that no
other data memory access writes to the same location in the upstream DM block. Hence
an upstream connection involving the same PCM port and time slot as the synchronous
transfer may not be programmed.
An idle code previously written to the data or control memory for the upstream or
downstream directions is overwritten.
At the PCM interface it is possible to restrict the synchronous exchange with the data
registers STDA (STDB) to a 2 or 4 bit subtime slot position. The working principle is
similar to the subchannel switching described in chapter 5.4.2.
Semiconductor Group
Up-
stream
Down-
stream
1
2
SAXA/SAXB: 1
SARA/SARB:
CFI
Frame
0
0
127
127
Code Field
1
1 0
0
1
0
0
Control Memory
CFI Port + Time - Slot
CFI Port + Time - Slot
1
1
Data Field
STDA/STDB:
213
2
1
3
4
SAXA/SAXB:
SARA/SARB: 0
3
4
0
Data Memory
PCM Port + Time - Slot
PCM Port + Time - Slot
Data Field
Application Hints
PEB 2055
PEF 2055
PCM
Frame
0
0
127
127
Up-
stream
Down-
stream
ITD08091