ARM-based MCU family extended for broader range of applications

29 June 2005 DSP, Micros & Memory Surveillance

STMicroelectronics has added new devices to its highly integrated 32-bit ARM-based STR710F microcontroller series. This extends the family to high-performance, cost-sensitive applications needing fewer on-chip facilities and to embedded systems that will benefit from increased on-chip RAM.

The new MCUs are intended to reduce costs, allow greater design flexibility, and enable manufacturers to produce a range of STR7-based products at different performance levels.

For applications that require the performance and flexibility of an STR7 microcontroller but have a limited amount of program code, ST is introducing lower-cost 64-Kbyte Flash versions of both the USB (STR711) and the CAN interface (STR712) devices - alongside the established versions that have either 128 or 256 Kbytes of Flash. Other cost-sensitive applications that do not need either USB or CAN interfaces can now use the new STR715, a lower-cost 'naked' MCU with 64 Kbytes of code Flash memory, 16 Kbytes of data Flash and 16 Kbytes of RAM, but with no USB or CAN module. All these devices are available in a TQFP64 package.

ST has also doubled the on-chip RAM of all of the mid-range, 128-Kbyte Flash versions in the STR710F family from 16 to 32 Kbytes, optimising their RAM/Flash balance, minimising any memory constraints during code development, and opening up new possibilities for more complex applications. The memory choices in the family are now 256 kbytes of code Flash with 64 Kbytes of RAM, 128 Kbytes of Flash with 32 Kbytes of RAM, and 64 Kbytes of Flash with 16 Kbytes of RAM; all devices include 16 Kbytes of data Flash memory.

The STR710F family - based on the industry-standard ARM7TDMI 32-bit RISC CPU - is ideal for embedded systems requiring a compact but powerful MCU, and for scalable solutions such as user interfaces, factory-automation systems and point-of-sale (POS) applications.

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