lan91c95 Standard Microsystems Corp., lan91c95 Datasheet - Page 58

• Manufacturer Part Number: lan91c95
• Description: Isa/pcmcia Full Duplex Single-chip Ethernet And Modem Controller With Ram
• Manufacturer: Standard Microsystems Corp.

I/O SPACE - BANK0
SOFT_RST - Software activated Reset. Active
high. Initiated by writing this bit high and terminated
by writing the bit low. The LAN91C95 configuration
is not preserved, except for Configuration, Base,
and IA0-IA5 Registers. The EEPROM in both ISA
and PCMCIA mode is not reloaded after software
reset.
FILT_CAR - Filter Carrier. When set filters leading
edge of carrier sense for 12 bit times. Otherwise
recognizes a receive frame as soon as carrier
sense is active.
STRIP_CRC - When set it strips the CRC on
received frames. When clear the CRC is stored in
memory following the packet. Defaults low.
OFFSET
BYTE
BYTE
HIGH
LOW
4
Packet Too Long
Run out of Memory
During Receive
SOFT_
RST
Res
0
0
RECEIVE CONTROL REGISTER
FILT_
CAR
Res
0
0
NAME
Res
Res
0
0
RX_ABORT
Res
Res
58
0
0
1
1
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 is
aborted due to length longer than 1532 bytes. The
frame will not be received. The bit is cleared by
RESET or by the CPU writing it low.
READ/WRITE
TYPE
Res
Res
0
0
ALMUL
RX_OVRN_INT
Res
0
0
0
1
STRIP_
PRMS
CRC
SYMBOL
0
0
RCR
ABORT
RXEN
RX_
0
0