GENERAL DESCRIPTION

INTRODUCTION
The ST72141K devices are members of the ST7 microcontroller family designed specifically for motor control applications and including A/D conversion and SPI interface capabilities. They include an on-chip Moter Controller peripheral for control of electric brushless moters with or without sensors. An example application, for 6-step control of a Permanent Magnet DC motor, is shown in Figure 1.

 

 

■ Memories

– 8K Program memory (ROM/OTP/EPROM)
– 256 Bytes RAM
■ Clock, Reset and Supply Management
– Enhanced reset system
– Low voltage supply supervisor
– 3 Power saving modes
■ 14 I/O Ports
– 14 multifunctional bidirectional I/O lines with: External interrupt capability (2 vectors), 13 alternate function lines, 3 high sink outputs
■ Motor Control peripheral
– 6 PWM output channels
– Emergency pin to force outputs to HiZ state
– 3 analog inputs for rotor position detection with no need for additional sensors
– Comparator for current limitation
■ 3 Timers
– Two 16-bit timers with: 2 input captures, 2 output compares, external clock input, PWM and Pulse generator modes
– Watchdog timer for system integrity
■ Communications Interface
– SPI synchronous serial interface
■ Analog Peripheral
– 8-bit ADC with 8 input pins
■ Instruction Set
– 8-bit data manipulation
– 63 basic instructions
– 17 main addressing modes
– 8 x 8 unsigned multiply instruction
– True bit manipulation
■ Development Tools
– Full hardware/software development package