pxb4219 Infineon Technologies Corporation, pxb4219 Datasheet - Page 41

• Manufacturer Part Number: pxb4219
• Description: Iwe8 Interworking Element For 8 E1/t1 Lines
• Manufacturer: Infineon Technologies Corporation

3.3
Table 11
Block
FR
OR
OQ
CR
UR
Data Sheet
Functional Block Description
Functions
Framer Receive interfaces
• FRCLK synchronization
• 8 bit serial to parallel conversion
• Frame and multiframe synchronization
• Timeslot counter
• Timeslot assignment and channel configuration (RAM1)
Octet Receive processing
ATM ports:
• Cell delineation
• HEC check: Header error detection and correction
• Cell payload de scrambling
• Idle or Unassigned Cell Deletion
• Statistics counter event generation
• Write to ATM Receive Buffer
AAL ports:
• Segmentation port de correlation
• Segmentation
• SN/SNP generation
• SDT pointer generation
• RTS value insertion
• Statistics counter event generation
• Write to Segmentation Buffer
Output Queue
• FIFO containing 256 addresses of cells to be sent to UTOPIA Receive
Cell Receive processing
ATM ports:
• Read cells from ATM receive buffer
AAL ports:
• Read cells from AAL segmentation buffer
• Padding of partially filled cells
UTOPIA Receive interface
• Cell level handshake
• Mapping of framer port number into ATM header in UTOPIA level 1
• Output buffer for 4 cells
mode and UTOPIA level 2 single PHY mode
Functions of IWE8 Blocks
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PXB4219 / PXB4220 / PXB4221
Functional Description
2002-05-06