# Un-Attackable(Non-Breakable) of W7500 and W5500
Written by [SOS Electronic]
Remarked by [duino4projects]
This article explains the merit of W5500 allows to resist hackers attack such like as flooding, spoofing, DDos, and etc, and to save a power consumption even though it is accessible high speed SPI upto 80Mhz.
#### Article 1
„Non-breakable“ interface converter combined with MCU? Wiznet is a solution.
In the last period we can see, that producers go on the way of processors combined with interface converters grouped into a single chip. Company Wiznet also goes this way.
At the end of May 2015, Wiznet launched on the market the new W7500, combining the HW TCP/IP interface converter W5x00 with an MCU. W7500 is a solution combining ARM Cortex-M0, 128kB Flash and the HW TCP/IP. It´s suitable for applications where you use TCP, UDP, IPv4, ICMP, ARP, IGMP and PPPoE. In these devices it´s usually undesired to upgrade SW resulting in resetting a device.
MCU W7500 uses HW TCP/IP thus selecting data which arrived from allowed source. W7500 processes only desired data, so “only” 50 MHz is enough. That´s approximately half the power necessary for SW TCP/IP solutions and it also doesn´t require so big Flash and RAM – as illustrated on the picture.
When comparing all data with other MCU, you can notice that with a small power you can make the same things as with the Wiznet solution. This fact is associated with not only reliability and comfort but also with approximately half the price of the chip.
#### Article 2
W5500 will resist hackers attack and save energy
New „hardwired“ TCP/IP chip from company Wiznet resists attacks, it´s fast and consumes only a minimum energy and host MCU resources.
TCP/IP solutions from company Wiznet are known by its resistance resulting already from their principle . all the solution is hardware-based, thus it´s not possible to change a basic functionality of a device (flooding, spoofing, …). W5500 outstands by its “modesty” – it only requires a few GPIO pins of a host MCU – thanks to a high speed SPI interface (up to 80 MHz) and it also has a very low power consumption. A result of a small consumption is, that the chip heats up to approx. 40´C at a common operation, in contrast to other similar chips, which usually have 60-70´C at operation. This naturally means a higher reliability, possibility of a more dense placing of components and elimination of problems with overheating of a device built-in into a small enclosure.
Energy saving is also enhanced by Power Down and Wake-on-LAN (over UDP) modes. Single 3,3V are enough for power supply, while inputs are 5V tolerant. Status is indicated on LED outputs (full/half duplex, link speed, active) and the chip contains a built-in OS Linux (kernel 2.4.xx, 2.6.xx, 3.1,xx) & RTOS driver.
In our offer can be found the W5500 chip itself W5500-EVB evaluation board, as well as a ready-made module WIZ550S2E-TTL or WIZ550io. Examples of a real usage of Wiznet chips can be found in the document Wiznet application reference.
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