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Fast ARM-based 32-bit MCUs match 16-bit cost

Fast ARM-based 32-bit MCUs match 16-bit cost

72-MHz microcontrollers tout high code density, fast interrupt response, and Thumb-2 instruction set

Said to provide the high-performance 32-bit processing needed in today’s advanced embedded systems at the cost of a 16-bit MCU, the STM32F103 and STM32F101 microcontrollers use a 72-MHz ARM Cortex-M3 core providing 1.25 Dhrystone MIPS/MHz. The ICs benefit from the Thumb-2 instruction set, which delivers improved performance combined with better code density than other instruction sets and a fast response tightly coupled nested vectored interrupt controller.

Fast ARM-based 32-bit MCUs match 16-bit cost

The devices have 32 to 128 Kbytes of flash and 6 to 20 Kbytes of SRAM. They come in 48- or 100-pin packages and need only 36 mA at 72 MHz with all peripherals clocked or just 2 μA in standby mode.

They have one or two 12-bit, 1 µs A/D converters, three USARTs, two 18-MHz SPI ports, two I2C ports, and up to three 16-bit timers with capture/compare. The 32F103 has USB, CAN, and seven DMA channels, while the 32F101 version has a slower 36-MHz clock. The devices are supported by development tools— an evaluation board, a USB developer’s kit, and a free software library—from ST and third parties. ($1.80 to $3.30 ea/10,000samples available now.)

STMicroelectronics , Lexington , MA
Information 781-861-2650
http://www.st.com

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