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ST expands ST7Lite MCU family

Posted: 16 Sep 2005     Print Version  Bookmark and Share

Keywords:ST 

STMicroelectronics (ST) announced a new series of 8bit flash microcontrollers (MCUs) within its low-cost ST7Lite family, adding new embedded peripherals to the ST7Lite feature set.

The ST7FLITE3 MCUs introduce an enhanced 12-bit auto-reload timer and a master/slave LINSCI asynchronous interface into the 20-pin package. According to ST, this marks a significant step forward in communication and control functionality for real-time, industrial, consumer and motor control applications.

The 12-bit timer offers four independent PWM output channels with programmable dead time generation, intended for use in half-bridge driving mode in motor control applications where PWM signals must not be allowed to overlap; a 2kHz to 4MHz frequency range; programmable duty cycles; polarity control; and programmable output modes.

Meanwhile, the embedded hardware LINSCI asynchronous serial interface will enable smooth implementation of LIN (Local Interconnect Network) bus applications. ST's exclusive LINSCI is a hardware-enhanced SCI port designed to simplify software design and to increase system performance by reducing CPU overhead. LIN is typically used in low-end automotive applications for communication between 12V intelligent sensors and actuators, but is also increasingly popular in industrial and consumer systems for reducing wiring complexity, explained ST.

The ST7FLITE3 series is supported by a complete set of hardware and software development tools, both from ST and from third parties. Low cost tools such as ST's Stick Programmer and the ST7FLITE-SK/RAIS development kit from Raisonance enable developers to rapidly and efficiently create, build and debug low-cost MCU-based systems. These tools integrate easily with the ST7 C compilers from Cosmic and Metrowerks, and are complemented by the free ST7 Software Library.

Other on-chip functions, including an internal 1MHz oscillator, a fast 10bit ADC with op amp and a trimmable Reset circuit with low voltage detection, promise to simplify system design and reduce manufacturing costs by eliminating the need for external circuitry for these functions. The 8KB of Extended Flash memory operates on a single power supply voltage to reduce board complexity and provide fast programming.

Priced at $1.30 in quantities of 10,000 pieces, the ST7FLITE3 is available in the 20-pin SO20 and DIP20 packages.




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