mt90502ag2 Zarlink Semiconductor, mt90502ag2 Datasheet - Page 64

• Manufacturer Part Number: mt90502ag2
• Description: Multi-channel Aal2 Sar
• Manufacturer: Zarlink Semiconductor

2.5
2.5.1
The RX TDM Module is responsible for reading bytes written to circular buffers in external memory by the RX SAR
and administering the data to the H.100/H.110 interface module (see Section 2.7, “H.100/H.110 Interface,” on
page 77). The RX TDM Module is capable of transmitting data in 1023 time slots on the H.100/H.110 bus.
TDM Reception
Overview
PCM/HDLC Circular
Buffers in SSRAM
CPS-Packet buffer
Cell sent to RX
data cell buffer
Sent to RX CPU
CPS-Packet
Written to a PCM
Circular Buffer in
CPS-Packet
SSRAM
ATM Cell Received on
Associated Link-List
Bytes send on
Into CPS-Packets
H.100/H.110
PCM/HDLC
Figure 28 - RX Cell Flow
Zarlink Semiconductor Inc.
Cell Broken up
CID/UUI Table
Look-up Table
H.100/H.110
RX Cell Flow
UTOPIA Port
RX Channel
Consulted
Consulted
Consulted
MT90502
64
(after Zero Insertion)
Buffer in SSRAM
HDLC Circular
Written to an
CPS-Packet
Loopback Memory
Low Latency
SSCS Error Report
CPS Error Report
retransmitted on
UTOPIA Port
(optional)
(optional)
Cell
Data Sheet