LAN91C111-NU Standard Microsystems (SMSC), LAN91C111-NU Datasheet - Page 49

• Manufacturer Part Number: LAN91C111-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN91C111-NU

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
SMSC LAN91C111 REV C
8.7
BYTE
BYTE
HIGH
LOW
Bank 0 - Receive Control Register
SQET - Signal Quality Error Test. This bit is set under the following conditions:
1. LAN91C111 is set to operate in Half Duplex mode (SWFDUP=0);
2. When STP_SQET=1 and SWFDUP=0, SQET bit will be set upon completion of a transmit
3. Once SQET bit is set, setting the TXENA bit in TCR register, or via hardware /software reset can
16COL - 16 collisions reached. Set when 16 collisions are detected for a transmit frame. TXENA bit
in TCR is reset. Cleared when TXENA is set high.
LTX_MULT - Last transmit frame was a multicast. Set if frame was a multicast. Cleared at the start
of every transmit frame.
MULCOL - Multiple collision detected for the last transmit frame. Set when more than one collision
was experienced. Cleared when TX_SUC is high at the end of the packet being sent.
SNGLCOL - Single collision detected for the last transmit frame. Set when a collision is detected.
Cleared when TX_SUC is high at the end of the packet being sent.
TX_SUC - Last transmit was successful. Set if transmit completes without a fatal error. This bit is
cleared by the start of a new frame transmission or when TXENA is set high. Fatal errors are:
SOFT_RST - Software-Activated Reset. Active high. Initiated by writing this bit high and terminated by
writing the bit low. The LAN91C111’s configuration is not preserved except for Configuration, Base,
and IA0-IA5 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!)
Reserved
SOFT
RST
16 collisions (1/2 duplex mode only)
SQET fail and STP_SQET = 1 (1/2 duplex mode only)
Carrier lost and MON_CSN = 1 (1/2 duplex mode only)
Late collision (1/2 duplex mode only)
operation and no SQET Pulse has occurred during the IPG (Inter Frame Gap). If a pulse has
occurred during the IPG, SQET bit will not get set.
clear this bit.
0
0
OFFSET
4
Reserved
CAR
FILT
0
0
RECEIVE CONTROL
REGISTER
ABORT_E
Reserved
NAME
NB
0
0
DATASHEET
Reserved
Reserved
49
0
0
READ/WRITE
TYPE
Reserved
Reserved
0
0
Reserved
ALMUL
SYMBOL
0
0
RCR
Revision 1.91 (06-01-09)
STRIP
PRMS
CRC
0
0
ABORT
RXEN
RX_
0
0