Microchip TCP/IP Stack 
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The Microchip ENC28J60 and PIC18F97J60 family Ethernet module offers:
  • IEEE 802.3 compatibility
  • 10Base-T port
  • 8 Kbytes of SRAM buffer
  • Internal DMA module for fast data movement
  • Hardware assisted IP checksum calculations
  • Programmable receive filters minimizing unwanted packets
  • 5V tolerant inputs
Features specific to the ENC28J60 include:
  • SPI interface with speeds up to 20Mb/s
  • 28 pin package
The Microchip TCP/IP Stack offers:
  • No royalty or license fee
  • Portable across Microchip PIC18, PIC24F, PIC24H, dsPIC30, and dsPIC33 family of microcontrollers
  • Out-of-box support for Microchip C18 and C30 compilers
  • RTOS independent
  • Implements complete TCP state machine
  • Multiple TCP and UDP sockets with simultaneous connection/management
  • Modular design to easily add new components
  • Use it as a part of HTTP Server (included) or any custom TCP/IP based application
  • Includes simple Microchip File System (MPFS)
  • PC based program to convert PC files into MPFS image
  • Included Modules: MAC, ARP, IP, ICMP, TCP, UDP, DHCP, FTP, IP Gleaning, HTTP, MPFS, Announce.
  • Bonus firmware modules: external SPI serial EEPROM, Tick Manager, Xmodem Receiver