m27651 Mindspeed Technologies, m27651 Datasheet - Page 3

• Manufacturer Part Number: m27651
• Description: Mindcontroller? Oc-12 Atm Shaper
• Manufacturer: Mindspeed Technologies

Memory Configuration
The M27651 requires external memory for channel context,
cell buffer storage, and program and variable storage. A
typical application using 64K connections would consist of
16 Mbytes ofDRAM for context and cell buffer storage,
and 2 Mbytes ofSRAM for program and variable storage.
Applications
The M27651, when used in conjunction with the M27650 ATM
Policer, forms a complete OC-12 ATM-layer solution. It can a l s o
be used as a stand-alone dev i c e, when only shaping fu n c t i o n s
are required. Typical applications include ATM switc h e s, r o u te r s,
m u l t i s e rvice edge concentrato r s, D S LAMs and wireless
base stations.
System Block Diagram
commands via the PCI bus, and receives results back through
bus functional models, IBIS models and a reference design are
Management Functions Via Host
A host processor controls the M27651. The host iss u e s
indications. Commands are available to open, close or modify
the following: PHY ports, channels and tunnels. Additional
commands get per-PHY or per-channel statistics, get or set
the OAM state, and get or set buffer class thresholds. The
host can also send or receive cells to or from any channel.
Support
Hardware simulation models (SWIFTand Verilog), test benches,
a va i l a b l e. Re ference code is provided to fa c i l i t a te host application
integration. A comprehensive set ofdiagnostics is provided to
assist with testing.
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