Cortex-M0 used in low power touch controller

Melfas, a touch sensor firm, has chosen the ARM Cortex-M0 processor and ARM physical IP libraries for capacitive touch screen controller ICs.

ARM’s Cortex-M0 processor – how it works

Melfas traditionally has used 8051-based controllers and it said it has made the change to achieve improved energy efficiency and lower cost.

“The ultra low power and gate count of the Cortex-M0 processor, combined with its 32-bit performance efficiency, makes it an ideal choice for mobile touch screen applications supporting increasing panel sizes,” said B.W. Lee, CEO, Melfas. 

The company said it was able to evaluate the new processor using its existing 8051 code base.

“The results demonstrated that we could halve the flash memory requirement using the Cortex-M0 processor, and reduce the MHz requirement by 5x, saving power,”  said D.J. Min, v-p of engineering at Melfas.

The change was helped by the fact that ARM’s Keil software development tools support both 8051 and ARM Cortex-M0 processor-based devices.

Melfas will incorporate foundry sponsored physical IP consisting of embedded memories and logic libraries.

According to market research firm, DisplaySearch, the total touch screen module market will grow from $3.6 billion in 2008 to $9bn by 2015, with a CAGR of 14%.

ARM libraries are available.

Tags: ARM, Cortex-M0

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