BCM8021_06 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – 10-GbE XAUI TRANSCEIVER WITH HIGH-SPEED REDUNDANCY

OVERVIEW
BCM8021 Block Diagram
The BCM8021 device integrates XAUI serializer/deserializer (SerDes)
channels leveraging Broadcom’s high-performance mixed-signal design
experience along with advanced 0.13µ CMOS process technology. This,
combined this with a robust architecture offering the highest degree of
flexibility, results is a highly programmable, lowest power SerDes
solution for network line-card and backplane applications.
An internal MUX connects the parallel and serial ports to enable fully
redundant operation. The MUX enables an active serial link to be
switched to the parallel interface, while a protection serial link can be
continuously monitored to insure its condition. If the active link fails, the
protection link can be muxed over through external control to the parallel
interface.
On the parallel side of the device, transmitters and receivers interface
with a 32-bit wide data (XGMII) along with the clock and control
signals. The low-speed I/O supports HSTL (1.5V or 1.8V) or SSTL_2
(2.5V) interfaces.
On the serial side of the device, transmitters and receivers support XAUI
serial transmission rates. An on-chip phase lock loop (PLL) synthesizes
the supplied reference clock to support the desired transmit rate, while
vlock and data recovery (CDR) units recover the receive rate clock for
timing.
For high-speed serial copper connections, the device incorporates both
transmit pre-emphasis on the transmit channels and receive equalization
on the receive channels. Transmit pre-emphasis is programmable to
improve the overall cable reach and compensate for electrical
imperfections associated with traces and connectors. Receive
equalization provides optimal performance over a variety of receive
interfaces.
Highly programmable test capabilities exist within the device to support
high-speed and low-speed loopback using generators/checkers that
support PRBS 27 to 231 patterns along with IEEE802.3ae-defined test
patterns. A complete evaluation kit, including an evaluation board,
related software, and documentation is available upon request.
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04/14/06
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