Fremont, Calif.--Aug. 27, 1997--Less then eight weeks after releasing the first Gigabit MAC CoreCell, CoreEl MicroSystems (Fremont, Calif.) unveiled a set of CoreCell packages along with a Testbench for a complete Gigabit Ethernet solution. With this introduction, CoreEl has more then thirty CoreCells to support the fast growing communication and telecom market, specifically ATM, Ethernet, and SONET.
The released Gigabit CoreCell set now includes the GEM (Gigabit Ethernet Media Access Controller or Gigabit MAC), physical layer sublayer 8b/10b encoding/decoding, auto negotiation function, and flow control for full duplex mode. The functional blocks meet the IEEE 802.3 D31 (draft 3.1) and other applicable standards. CoreEl also introduced a general-purpose user programmable and easily extendable Testbench for Gigabit Ethernet applications. CoreEl plans to release the VLAN support function, and RMON Assist CoreCells within the next eight weeks.
All cores come in the form of fully synthesizable RTL VHDL source code while optionally Verilog source code can be made available on request. Detailed and comprehensive specification, theory of operation, clearly defined and modeled interfaces with compilation and synthesis scripts for majority of the industry standard tools including Synopsys, Mentor Autologic II, Exemplar are provided with each CoreCell. All CoreCells meet the requirements of the VSI Alliance architecture document version 1.0.
The current release of CS-1000 Gigabit Ethernet Media Access Controller (MAC) fully meets the IEEE 802.3Z/D3.1 draft standard. The core supports all the standard features like Gigabit carrier extension, frame bursting, half and full duplex operation, short frame transmission with padding, etc. It also includes other value-added features like programmable burst length, and long frame transmission. The GEM core is fully synchronous and designed to operate at 125 MHz clock frequencies in 0.5-m and 0.35-m CMOS technology. Extensive statistical information is provided on frame by frame basis. This forms the basis for the RMON assist CoreCell.
The CS-1001 is a Gigabit Ethernet PCS CoreCell that meets IEEE 802.3z/D3.1 clause 36 draft standard. The features include 8B/10B encoding decoding, carrier sense state machine, collision signals for the MAC, PCS transmit and receive state machines, and the synchronization state machine. It implements GMII interface and directly connects between Gigabit MAC and standard 10-bit fiber channel Gigabit PHY.
The CS-1002 CoreCell implements Auto Negotiation function defined for the Gigabit Ethernet in clause 37 of IEEE 802.3z/D3.1. It allows the stations on a common link to advertise link capabilities, acknowledge messages, understand common modes of operation, and configure automatically. All standard functions including link configuration, full/half duplex capability, pause capability, remote fault as well as additional features like re-negotiation, priority resolution, and next page function are supported.
The CS-1003 CoreCell implements flow control function for full duplex mode and meets IEEE 802.3x draft standard (annex 31B).
CS-1005 VLAN Support CoreCell, compliant with IEEE 802.3Q standard supports frame tagging or tag header insertion and tag header removal, relaying of tagged frames, maintaining minimum size frames and recomputation of FCS (Frame Check Sequence).
CoreEl MicroSystems also provides a user-friendly testbench CS-1000T to test all of the above CoreCells as well as for ASIC, board, or system level testing. The testbench is general purpose enough and can easily be configured to be used with other Gigabit MAC cores.
46750 Fremont Blvd.
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