Lexington, Mass. STMicroelectronics' newest general purpose 32-bit flash microcontroller based on the ARM7TDMI-S core supports full-spec operation at both 3.3V and 5V. The STR750F family delivers 54 MIPS (at 60MHz) performance while providing low power modes down to 12 microA in STOP or 10 microA in STANDBY modes, making it ideal for battery-operated applications.
The initial family comprises some thirty different configurations, with from 64K up to 256 KBytes of flash plus an additional 16K bank of Read-While-Write Flash for EEPROM emulation. The embedded Flash memory offers retention characteristics, with data retention guaranteed up to 20 years at 85°C.
Devices offer up to eight communication peripherals including USB and CAN, as well as a 4-channel DMA controller that significantly reduces CPU loading and a fast 10-bit ADC. Some members of the new family are specified over an extended temperature range of -40°C to +105°C.
There are numerous features aimed at motor control applications. There is a backup clock that starts operating if the main clock fails; a fast startup capability that allows the device to start executing code in only 55 microseconds instead of the 1ms typically required for devices using a quartz crystal. There is an Automatic Wake Up (AWU) capability that removes the need for external signals or components to wake up from low power STOP or STANDBY modes; and three flexible and powerful 16-bit timers and a PWM timer. There are also 3-phase motor control features that simplify the implementation of complex motor control including vector control drive applications.
Serial communications features include up to three high-speed (2Mb/s) UARTs with support for the LIN protocol, and a serial memory interface for glueless connection to an external serial Flash memory. Finally the STR750 family also includes new mechanisms to allow bit manipulation and masks to protect I/O pins.
For more details, see the diagram below.
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The integration, performance, and low power, as well as the 3.3V and 5V features, make this device appropriate as a general purpose micro, said Jim Nicholas, General Manager of ST's Microcontroller Division. Along with the enhanced security features such as the backup clock, this makes the new devices particularly suitable for alarm system control panels, motor control, data loggers, modem, printers/scanners, vending machines, and a wide range of other embedded applications.
The STR750F family is fully supported with standard and USB libraries available with low-level drivers for all the peripherals, and an evaluation board that is delivered with demos for USB, SMI, timers, and an ADC, a JTAG connector, a motor-control connector, and a power supply. Third party starter kits are also available from IAR, Raisonance, Hitex, and Keil. The kits contain a JTAG emulator, target board, and C compiler.
The devices, which are available in sample quantities today with volume production imminent, are available in TQFP64 /BGA64 and TQFP100/BGA100 packages. Prices (10K units) range from $3.60 for the STR755FR0T6 (64K Flash, 64-pin package) to $6.50 for the STR750FV2T6 (256K Flash, 100 pins, USB, CAN).
STMicroelectronics, Inc. (888-787-3550)