RS8234 Mindspeed Technologies, RS8234 Datasheet - Page 11
RS8234
Manufacturer Part Number
RS8234
Description
Atm Servicesar Plus With Xbr Traffic Management
Manufacturer
Mindspeed Technologies
Datasheet
1.RS8234.pdf
(401 pages)
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RS8234
ATM ServiceSAR Plus with xBR Traffic Management
Figure 1-1. RS8234 Functional Block Diagram
28234-DSH-001-B
Interface
PCI Bus
50
PCI Master/Slave
Slave
Logic
Master
Logic
PCI
PCI
Bus
1.2 Service-Specific Performance Accelerators
The RS8234 incorporates several service-specific features, which accelerate
system performance. Some of these service level features provide the possibility
for designers to accelerate specific protocol interworking functions. Other service
level features enable network level functionality. These features are outlined in
Chapter
UNI or NNI Addressing
The RS8234 handles both User-Network Interface (UNI) addresses, which use an
8-bit Virtual Path Identifier (VPI) field, and Network-to-Network Interface (NNI)
addresses, which use a 12-bit VPI field.
Frame Relay Interworking
The VBR traffic category includes rate-shaping via the dual leaky bucket Generic
Cell Rate Algorithm (GCRA) based on the Cell Loss Priority (CLP) bit, for use in
Frame Relay. The RS8234 also implements the Frame Relay discard attribute by
Domain
Clock
PCI
2048 bytes)
Burst FIFO
Internal SRAM
Control/Status
(Depth =
64 bytes)
(Depth =
Counters,
Registers,
Burst
FIFO
DMA Coprocessor
and
2.0, and are fully described in succeeding chapters.
Mindspeed Technologies
(System Clock
Domain)
Outgoing
Incoming
Channel
Channel
Local Bus
DMA
DMA
Interface
Memory
Arbiter
Segmentation Block
Reassembly Block
60
Local Bus
ABR Flow Control
Segmentation
xBR Scheduler /
Coprocessor
Reassembly
Coprocessor
Mgr.
xBR Traffic
Manager
(32 bit)
Clock/
Timer
1.2 Service-Specific Performance Accelerators
™
256 bytes)
512 bytes)
(Depth =
(Depth =
Tx FIFO
FIFO
Rx
(ATM PHY Interface
1.0 RS8234 Product Overview
(Boundary Scan
Clock Domain)
Clock Domain)
Boundary
Scan
Physical
Physical
Port
Port
Rx
Tx
5
Test Bus
12
12
ATM
Physical
Transmit
Interface
ATM
Physical
Receive
Interface
100074_001
1-3
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