LAN9500 Datasheet, PDF (135/213 Pages) SMSC Corporation – USB 2.0 to 10/100 Ethernet Controller Promiscuous mode

LAN950x
Bits
Description
0 Flow Control on Any Frame (FCANY)
When this bit is set, the device will assert back pressure, or transmit a pause
frame when the AFC level is reached and any frame is received. Setting this
bit enables full-duplex flow control when the device is operating in full-duplex
mode.
When this mode is enabled during half-duplex operation, the Flow Controller
does not decode the MAC address and will send a pause frame upon receipt
of a valid preamble (i.e., immediately at the beginning of the next frame after
the RX Data FIFO level is reached).
When this mode is enabled during full-duplex operation, the Flow Controller
will immediately instruct the MAC to send a pause frame when the RX Data
FIFO level is reached. The MAC will queue the pause frame transmission for
the next available window.
Setting this bit overrides bits [3:1] of this register.
Type
R/W
Default
0b
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DS00001875A-page 135