Practical security in contact controllers for trade and the kitchen

Microchip MXT640UD-HA MXT448UD-HA touch controllersMicrochip is introducing a touchscreen controller licensed to IEC/UL 60730 Class B that can work on shows over 10in throughout.

Referred to as MXT448UD-HA, it’s also compliant with IEC61000-4-6 Class A for carried out noise immunity as much as 10Vrms (stage three for industrial use).

“This permits merchandise with a contact display screen interface to perform in very harsh manufacturing unit environments the place electromagnetic interference might be brought on by conveyer belts, energy rails or meeting equipment,” in line with the corporate. “Producers of dwelling home equipment will profit from an elevated reliability and manufacturing yield. This can be a large enchancment for shoppers utilizing unprotected touchscreens on an oven or washer that will end in concern for false or missed touches brought on by electromagnetic interference from unshielded energy transmission, electrical motors, and neighbouring electrical tools.”

MXT640UD-HA is an identical product to be used on shows as much as 9.7in.

Every has each SPI and I2C interfaces that may function concurrently so as to add redundancy to a design – for instance permitting separate communication to the host MCU and security MCU. Contact occasions are offered to each processors on the identical time.

This structure permits all safety-critical firmware to be developed on a devoted safety-certified MCU with necessary supply code overview by an IEC/UL take a look at lab, separate from code operating the equipment’s graphical person interface on the principle processor.

In keeping with the MXT640UD-HA information temporary (information sheets not publicly accessible), it really works by means of PET plastic or glass, together with curved profiles, though “configuration and stack-up to be authorized by Microchip or a Microchip-qualified contact sensor module companion”.

A naked finger can be utilized with 10mm glass or 5mm PMMA plastic and  gloved multi-finger contact is feasible with 6mm glass or 3mm PMMA. There are sensor and finger caveats on each of those, and gloves are as much as 5mm thick (which is equated to 2.7mm PMMA – and fascinating factoid, Ed). Non-rectangular sensor designs are supported – round, rounded or with cut-outs, for instance.

In keeping with Microchip: “the MXT448UD-HA and MXT640UD-HA household helps an working temperature as much as 105°C”, though in line with the MXT640UD-HA information temporary operation is over -40 to +85°C.

Growth instruments embody maXTouch Studio and the general-purpose ATEVK-MXT640UD-A analysis equipment – “Prospects particularly needing the house equipment purposeful security model of this analysis equipment can contact Microchip to request it”, stated the corporate. MaXTouch Analyzer is a manufacturing end-of-line take a look at/inspection instrument.

Product pages:

MXT448UD-HA not but public

9.7in MXT640UD-HA

MXT640UD-HA information temporary is right here


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