MICROCONTROLLER SOLUTIONS

Super-Integrated ARM7-Based Controllers Boast Full-Spec Operation at 3.3V and 5V

STMicroelectronics has extended its STR7 range of 32-bit microcontrollers based on the ARM7TDMI-S core with the introduction of the super-integrated STR750F family. The first general-purpose ARM7 Flash microcontrollers to support full-spec operation at both 3.3V and 5V, the new family delivers 54MIPS (at 60MHz) performance while providing outstanding low power modes down to 12μA in STOP or 10μA in STANDBY modes.



The initial family comprises some 30 different derivatives with Flash memory capacities from 64Kbyte up to 256Kbyte plus an additional 16Kbyte bank of Read-While-Write Flash for EEPROM emulation.

The ability to operate from either 3.3V or 5V gives maximum flexibility in electrically noisy environments without additional costs, whilst the devices’ low-power capabilities make them suitable for battery-operated applications. The STR750F family offers an extended feature set including a backup clock that starts operating if the main clock fails. This is a particularly attractive feature for security applications such as alarm system control panels and vending machines.

A fast startup capability allows the devices to begin executing code in only 55μs, whilst an Automatic Wake Up (AWU) capability removes the need for external signals or components to wake up from low power modes. To simplify the implementation of complex motor drive applications, including vector control, the devices include three flexible and powerful 16-bit timers and a PWM timer that includes three-phase motor control features.

Serial communications include up to three high-speed (2Mbit/s) UARTs with support for the LIN protocol and a serial memory interface for glueless connection to an external serial Flash memory. The devices also include new mechanisms to allow bit manipulation and masks to protect I/O pins.

The on-chip Flash memory offers industry-leading retention characteristics of up to 20 years at 85°C. Devices offer up to eight communication peripherals, including USB and CAN, as well as a four-channel DMA controller that significantly reduces CPU loading and a fast 10-bit ADC. Versions are available that are specified over an extended temperature range of -40°C to +105°C.

The STR750F family is fully supported with standard and USB libraries, low-level drivers for all the peripherals, an evaluation board that is delivered with demos for USB, SMI timers, an ADC, a JTAG connector, a motor control connector and a power supply.

The devices are supplied in TQFP64/BGA64 and TQFP100/BGA100 packages.



Features

• 60MHz ARM7-based 32-bit Flash microcontrollers
• 3.3V and 5V operation
• Up to 256Kbyte main Flash memory
• Additional 16Kbyte bank of Read-While-Write Flash for EEPROM emulation
• Power saving modes down to 10µA
• RTC and backup clock
• Fast (55µs) start-up and automatic wake-up
• PWM with three-phase motor control features
• Three LIN-compatible UARTs; CAN; USB support
• Extended -40°C to +105°C temperature range available
• TQFP or BGA packaging

Applications

• Industrial
  • PLC
  • Inverters
  • Printers, scanners
  • Boiler control
  • Industrial networking
• Building and security
  • Alarm systems
  • Video intercom
  • HVAC
• POS
  • Vending machines
  • ATMs
• Appliances
  • Motor drive
  • Application control
• Data loggers
• Medical monitors
• PC peripherals

For further information, including the STR750 Product Brief and the STR750F MCU Datasheet, please click here