AC206-DS04-R View Datasheet(PDF) - Broadcom Corporation
Part Name
Description
MFG CO.
'AC206-DS04-R' PDF : 70 Pages View PDF
AC206
Preliminary Data Sheet
07/08/02
BRIDGE FUNCTION
MEDIA INDEPENDENT INTERFACE
The bridge supports MII for 10/100 Mbps. Port 0 of bridge can support either 10 or 100, while port 1 supports only at
100 Mbps. Refer to the mode pin table to configure port 0.
FORWARDING SCHEME
The bridge supports the store-and-forward scheme only. It does not support cut-through-forward. With store-and-forward,
the incoming packet should be completely received to the buffer without error before it can be sent out.
ADDRESS RECOGNITION
The self-learning bridge function is based on source address field of packets. The bridge uses the XOR hashing algorithm
to address look-up table. Programmable aging time and fast aging control is supported.
RESET AND RESTART
At power on, the bridge initially goes to the SRAM self-test mode. It generates eight patterns to evaluate SRAM status.
MEDIA ACCESS CONTROL
The bridge media access control (MAC) complies with certain IEEE 802.3 MAC protocols such as frame formatting and
collision handling, but does not generate CRC codes. It generates a 56-bit preamble and start of frame delimiter while a
packet is sending. In half-duplex mode, the device listens before transmitting, to prevent traffic jam. During collision, a packet
is retransmitted at a random time.
Page 6 Bridge Function
Broadcom
Document AC206-DS05-405-R
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