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ST extends STR710F series

Posted: 17 May 2005 ?? ?Print Version ?Bookmark and Share

Keywords:stmicroelectronics? st? arm? str710f? microcontroller?

STMicroelectronics (ST) announced last week new devices in its highly integrated 32bit ARM-based STR710F microcontroller (MCU) series, which will extend this family to high-performance, cost-sensitive applications needing fewer on-chip facilities and to embedded systems that will benefit from increased on-chip RAM. According to the company, these new MCUs will reduce costs, allow greater design flexibility and enable manufacturers to produce a range of STR7-based products at different performance levels.

ST has doubled the on-chip RAM of all of the mid-range, 128KB flash versions in the STR710F family from 16KB to 32KB, optimizing the RAM/flash balance of these devices, minimizing any memory constraints during code development, and opening up new possibilities for more complex applications. The memory choices in the family are now 256KB of code flash with 64KB of RAM, 128KB of flash with 32KB of RAM, and 64KB of flash with 16KB of RAM; all devices include 16KB of data flash memory.

For applications that require the performance and flexibility of an STR7 MCU but have a limited amount of program code, ST is introducing lower-cost 64KB flash versions of both the USB (STR711) and the CAN interface (STR712) devices, alongside the established versions which either have 128KB or 256KB of flash program memory. Both of the new devices retain the 16KB data-flash memory of other family members and include 16KB of RAM. They are available in a 64-pin TQFP64 package.

Other cost-sensitive applications that do not need either USB or CAN interfaces can now utilize the new STR715, a lower-cost 'naked' MCU with 64KB of code flash memory, 16KB of data flash and 16KB of RAM, but with no USB or CAN module. This 32bit MCU is available in a TQFP64 package and is suitable for small-footprint, low-cost applications such as industrial systems and consumer appliances that need a versatile and high-performance processor, but not USB or CAN.

The STR710F family is designed 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. It offers best-in-class random access time to flash memory, up to 33MHz direct from flash and up to 50MHz, with zero- wait states for sequential code, using burst acceleration. The family offers up to ten communications interfaces, including CAN, USB, HDLC (High-Level Data Link Control), MMC (Multimedia Card) and a smart-card interface.

Flexible package options include the compact, low-pin-count TQFP64, and a 144-pin TQFP144 with external memory bus. A choice of cost-effective, state- of-the-art hardware and software development tools includes an ARM RealView Developer Kit targeted specifically at ST's STR7 family.

All of the new MCUs are available in sample quantities, and will enter volume production by the end of Q2 2005. Pricing is approximately $5.50 in quantities of 10,000 for the STR711 and STR712 members of the family, and around $4.60 for the STR715.

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