SMC91C100 Datasheet, PDF (25/83 Pages) List of Unclassifed Manufacturers – FEAST Fast Ethernet Controller

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OFFSET
4
NAME
RECEIVE CONTROL REGISTER
TYPE
READ/WRITE
SYMBOL
RCR
HIGH
BYTE
SOFT
RST
FILT CAR
0
0
0
0
STRIP
CRC
RXEN
0
0
0
0
0
0
0
0
LOW
BYTE
ALMUL
PRMS
RX_
ABORT
0
0
0
0
0
0
0
0
SOFT_RST Software-activated Reset. Active
high. Initiated by writing this bit high and
terminated by writing the bit low. The
SMC91C100's configuration is not preserved
except for Configuration, Base, and IA0-5
Registers. EEPROM is not reloaded after
software reset.
FILT_CAR Filter Carrier. When set, filters leading
edge of carrier sense for 12 bit times (3 nibble
times). Otherwise recognizes a receive frame as
soon as carrier sense is active. (Does NOT filter
RX_DV on MII!)
STRIP_CRC When set, it strips the CRC on
received frames. When clear, the CRC is stored
in memory following the packet. Defaults low.
RXEN Enables the receiver when set. If cleared,
completes receiving current frame and then goes
idle. Defaults low on reset.
ALMUL When set, accepts all multicast frames
(frames in which the first bit of DA is '1'). When
clear accepts only the multicast frames that match
the multicast table setting. Defaults low.
PRMS Promiscuous Mode. When set, receives
all frames. Does not receive its own transmission
unless it is in full duplex!.
RX_ABORT This bit is set if a receive frame was
aborted due to length longer than 2044 bytes.
The frame will not be received. The bit is cleared
by RESET or by the CPU writing it low.
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