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Secure MCU simplifies EMV contactless payment terminals

Secure MCU simplifies EMV contactless payment terminals

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By Julien Happich



Currently, designers of mobile payment devices have to use multiple external ICs for memory expansion, contactless interface and amplifier, ISO7816 PHY, magnetic stripe interface, and battery switch functions. These functions have been integrated into the MAX32560 DeepCover secure ARM Cortex-M3 microcontroller, eliminating the need for up to six external chips.
The MAX32560 embeds all the security features required to address stringent PCI-PTS requirements, including active tamper protection, scrambling keypad for PIN handling, and a secure cryptographic engine. It integrates a number of analog interfaces to reduce the PCB footprint, including a full EMV contactless reader interface, two EMV smart card interfaces, a DSP-based high performance magnetic stripe reader, 2-channel ADC, and a DAC.
The chip offers 1MB of embedded flash memory, 384KB of SRAM, and 8KB of secure NVSRAM. The memory can be further expanded through external fast serial flash memories via a flexible QuadSPI controller with XiP, and can quickly read and decrypt code or data using an on-the-fly AES engine. For communication interfaces, the MAX32560 provides a USB device port, three SPI controllers, two UARTs, and two I²C controllers. The IC comes in a 9x9mm BGA144 package and operates across the -40 to +85ºC temperature range.
Visit Maxim Integrated at www.maximintegrated.com

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