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Low-cost flash MCU offers up to 24 I/O lines

Posted: 08 Aug 2007 ?? ?Print Version ?Bookmark and Share

Keywords:8bit flash MCUs? power management? small memory MCUs?

STMicroelectronics has unveiled a new series of 8bit flash MCUs within the low-cost ST7Lite family that feature up to 24 I/O lines. ST7Lite is designed specifically for simpler products such as security and lighting systems, power management, small appliances, sensors and motor control.

The new ST7LITE49M series, available in an LQFP32 package for mass production and in SDIP32 for prototyping, expands the Lite family by offering small memory MCUs, up to 4Kbytes, with up to 24 high-sink-current I/O lines, in combination with the ST7Lite feature set.

Embedded designs for simple and low-cost applications require a small firmware size, coupled with high flexibility in terms of bidirectional I/O lines. The new ST7LITE49M family is designed to meet these requirements, offering cost effective devices, in both flash and pre-programmed versions, with 128bytes of true EEPROM on board.

A timer set is integrated on the chip, including a configurable watchdog timer, dual 8bit Lite timers with prescaler and dual 12bit auto-reload timers, which operate over the 250Hz to 4MHz range and provide four PWM signals with output compare function, input capture, dead-time generation and one-pulse mode. In particular, the 12bit timer is specifically optimized for lighting and motor control applications, such as in e-bike or air conditioning.

Other on-chip functions include a precise internal 8MHz RC oscillator; 32kHz auto-wake up oscillator, a 10-channel, 10bit ADC, five power saving modes and a trimmable reset circuit with low voltage detection. These functions simplify system design and reduce design effort by eliminating the need for external circuitry. Moreover, an I?C communication interface is integrated on chip.

A wide development platform is available for the family, with a complete set of hardware and software tool chains from ST and from third parties.

ST's ST7Lite family is a full range of entry level 8bit flash MCUs intended for cost-sensitive applications and is now available in 8-pin to 32-pin packages. They provide outstanding flexibility at every stage of the development cycle, from the first prototype to production, ensuring reduced cost of ownership and fast time to market.

The ST7LITE49M is available now, in SDIP (samples) and LQFP32 (volume) packages. Pricing starts at 78 cents each in quantities of 10,00 pieces.

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