PXB4221 Infineon Technologies AG, PXB4221 Datasheet - Page 44

• Manufacturer Part Number: PXB4221
• Description: IWE8 Interworking Element for 8 E1/T1 Lines
• Manufacturer: Infineon Technologies AG

Table 11
Block
CV
RB
CK
JT
ICRC
External
RAM
Data Sheet
Functions
External Clock Recovery interface
• Generation of serial communication frames to external clock recovery
• Generation of synchronization for RTS generation by external clock
• Reception of frames with RTS values from external clock recovery
RTS Buffer
• Buffer for 2 incoming RTS values per port
Clock & Reset
• Clock distribution
• Reset control
JTAG interface
• Boundary Scan register
• TAP controller
Internal Clock Recovery Circuit
• Synchronous Residual Time Stamp SRTS
• Adaptive Clock Method ACM
ATM Transmit Buffer
• Compensate packetization delay on the PDH interface.
• Maximum size of 256 ATM cells per port.
• Maximum size of 64 octets per ATM cell.
ATM Receive Buffer
• Maximum size of 16 ATM cells per port.
• Maximum size of 64 octets per ATM cell.
Segmentation Buffer
• Compensate segmentation delay in the ATM network.
• 1024 bytes per port (unstructured CES)
• 256 bytes per timeslot (structured CES)
Reassembly Buffer
• Compensate the Cell Delay Variation (CDV) of the ATM network.
• 512 bytes per timeslot. (structured CES)
circuit, containing RTS values and or ACM buffer filling
recovery circuit.
circuit
Functions of IWE8 Blocks
44
PXB4219 / PXB4220 / PXB4221
Functional Description
2002-05-06