About the Module
Ethernet Controller
The ConnectCore XP 270 module provides an Ethernet connection (Link + PHY Layer)
directly on the module board. This connection is made with the LAN91C111 chip from
SMSC.
These are features of the chip:
10/100 non-PCI Ethernet Single Chip Ethernet Controller (MAC + PHY)
Fully supports Full Duplex Switched Ethernet
Supports burst data transfer
8 Kbytes internal memory for receive and transmit FIFO buffers
Supports 16 and 32-bit CPU accesses
Internal 32 bit wide data path (into packet buffer memory)
3.3V operation with 5V tolerant I/O buffers
Single 25 MHz reference clock for both PHY and MAC
128-pin TQFP package, 1.0 mm height
Industrial temperature range from -40°C to 85°C
Fully integrated IEEE 802.3/802.3u - 100BASE-TX/10BASE-T physical layer
Auto negotiation: 10/100, full/half duplex
LED outputs (user selectable, up to 2 LED functions at one time): link,
activity, full duplex,10/100, transmit, and receive
The Intel PXA270 processor CS1# signal enables accesses to the Ethernet Controller
chip. Although the chip can be accessed in 8, 16, and 32-bit accesses, ConnectCore
XP 270 has been designed to support only 16-bit and 32-bit accesses.
The memory area reserved for the ConnectCore XP 270 Ethernet Controller is
0x0400 0300 to 0x0400 030F. Accesses to the chip are made with the PXA270
processor’s VLIO (Variable Latency) interface. LAN91C111 has no special external
EEPROM, but receive the MAC address from the 1-wire EEPROM.
The LAN91C111 interrupt pin is connected to the PXA270 processor GPIO90 pin.
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