器件名称: PM73488
功能描述: 5 Gbit/s ATM Switch Fabric Element
文件大小: 69.32KB 共4页
简 介:PMC-Sierra,Inc.
Released
Supports 128 internal multicast groups, expandable to 256 K with external SRAM. Provides 64 internal cell buffers for multicast cells.
PM73488 QSE
Provides a demultiplexed address/data CPU interface. Provides an IEEE 1149.1 (JTAG) boundary scan test bus.
5 Gbit/s ATM Switch Fabric Element
FEATURES
SWITCHING ALGORITHM
Supports blocking resolution in the switch fabric. Guarantees a lower bound on switch performance using a patented randomization algorithm called Evil Twin Switching. Determines routes using specified bits in the header (self-routing switch fabric) for unicast traffic. Determines output groupings using a lookup table for multicast traffic. Allows output ports to be combined in groups of 1, 2, 4, 8, 16, or 32 for unicast traffic. Allows output ports to be combined in groups of 1, 2, or 4 for multicast traffic.
PHYSICAL CHARACTERISTICS
3.3 V supply voltage. 5 V tolerant inputs. 596-pin Enhanced Plastic Ball Grid Array (EPBGA) package. Operates from a single 66 MHz clock.
DIAGNOSTIC/ROBUSTNESS FEATURES
Checks the header parity. Counts tagged cells. Checks for connectivity and stuck-at faults on all switch fabric interconnects.
I/O FEATURES
Provides 32 switch fabric interfaces with integrated phase aligner clock recovery circuitry. Provides a Start-Of-Cell (SOC) output per four switch element interfaces. Provides an external 16-bit Synchronous SRAM (SSRAM) interface for multicast group expansion.
APPLICATIONS
A 5 G……