lan91c100 Standard Microsystems Corp., lan91c100 Datasheet - Page 26

• Manufacturer Part Number: lan91c100
• Description: Feast ? Ast Ethernet Controller
• Manufacturer: Standard Microsystems Corp.

I/O SPACE - BANK 0
SOFT_RST Software-activated Reset. Active
high.
terminated by writing the bit low.
LAN91C100's configuration is not preserved
except for Configuration, Base, and IA0-5
Registers.
software reset.
FILT_CAR
leading edge of carrier sense for 12 bit times (3
nibble times). Otherwise recognizes a receive
frame as soon as carrier sense is active.
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.
BYTE
BYTE
HIGH
LOW
OFFSET
Initiated by writing this bit high and
4
Filter Carrier.
EEPROM is not reloaded after
SOFT
RST
0
0
FILT CAR
RECEIVE CONTROL REGISTER
0
0
When set, filters
NAME
0
0
0
(Does
The
26
0
0
0
RXEN
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
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.
frames.
0
0
0
Enables the receiver when set.
READ/WRITE
TYPE
ALMUL
Does
0
0
0
not
STRIP
PRMS
CRC
receive
0
0
SYMBOL
RCR
ABORT
its
RXEN
RX_
0
0
own
If