Der W7100 ist eine Ein-Chip-Lösung für Messe-Steuern-Regeln über Internet. Er integriert einen 8051 Mikrocontroller, 64kB SRAM, 64kB Flash und Hardware TCP/IP Core mit 32kB Buffer für hohe Netzwerk-Performanz. Der Controller kann direkt über die serielle Schnittstelle programmiert werden. Zur Verfügung steht ein In-Circuit Debugger und unterstützt werden Keil-, IAR- und GNU-Compiler. Der Hardware TCP/IP Core ist in verschiedenen Chips von WIZnet als "Hardwired-TCP/IP" eine seit Jahren im Markt eingeführte Netzwerk-Interface Lösung (z.B. W3150, W5100, W5300). Der vollständig auf Gatterebene integrierte Stack unterstützt alle Layer 3 und 4 Protokolle wie TCP, UDP, IPv4, ICMP, ARP, IGMP, PPPoE(DSL) und Multicast und entlastet den Controller von allen Protokollaufgaben. Mit integriertem Ethernet MAC und PHY bietet der W7100 als 4in1 SoC (System on Chip) die ideale Basis für kleine und schlanke embedded Ethernet Anwendungen. Damit können z.B. Sensoren, Messinstrumente und Energiezähler vernetzt werden. WIZnet hat aus diesen Chips auch verschiedene Module entwickelt, als einfaches Gateway-Modul z.B. das WIZ107sr oder als Multi-IO-Webserver das WIZ220io. Es gibt freie Open Source Treiber und Beispiele für verschiedene MCUs und Anwendungen. Ein Betriebssystem wird dabei auch für WEB-, FTP- oder DHCP-Client und Server nicht benötigt.
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