LAN91C110-PU SMSC, LAN91C110-PU Datasheet - Page 15

• Manufacturer Part Number: LAN91C110-PU
• Description: Ethernet ICs Non-PCI 10/100 Ethernet MAC
• Manufacturer: SMSC
• Type: Single Chip MAC and PHY Controllerr

Specifications of LAN91C110-PU

• Ethernet Connection Type: 10 Base-T, 100 Base-TX
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Product: Ethernet Controllers
• Number Of Transceivers: 1
• Standard Supported: 802.3
• Data Rate: 10 MB, 100 MB
• Supply Voltage (max): 5 V
• Supply Voltage (min): 0 V
• Supply Current (max): 40 mA
• Maximum Operating Temperature: + 70 C
• Package / Case: TQFP-144
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Chapter 5
5.1
STATUS WORD
BYTE COUNT
DATA AREA
CONTROL BYTE
BYTE COUNT - Divided by two, it defines the total number of words including the STATUS WORD, the BYTE
COUNT WORD, the DATA AREA and the CONTROL BYTE.
SMSC LAN91C110 Rev. B
Packet Format in Buffer Memory
The packet format in memory is similar for the Transmit and Receive areas. The first word is reserved for the
status word. The next word is used to specify the total number of bytes, and it is followed by the data area.
The data area holds the packet itself.
2046 Max
(DECIMAL)
OFFSET
RAM
0
2
4
Data Structures and Registers
bit15
RESERVED
TRANSMIT PACKET
Written by CSMA upon transmit
completion (see Status Register)
Written by CPU
Written/modified by CPU
Written by CPU to control
odd/even data bytes
2nd Byte
CONTROL BYTE
Last Byte
Figure 5.1 – Data Packet Format
DATASHEET
STATUS WORD
Page 15
DATA AREA
FEAST Fast Ethernet Controller for PCMCIA and Generic 16-Bit Applications
BYTE COUNT (always even)
LAST DATA BYTE (if odd)
RECEIVE PACKET
Written by CSMA upon receive
completion (see RX Frame
Status Word)
Written by CSMA
Written by CSMA
Written by CSMA; also has
odd/even bit
1st Byte
bit0
Revision 1.0 (11-04-08)
Datasheet