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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ST92141 Datenblatt(PDF) 7 Page - STMicroelectronics |
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ST92141 Datenblatt(HTML) 7 Page - STMicroelectronics |
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7 / 179 page  7/179 ST92141 - GENERAL DESCRIPTION 1.1.4 Low Voltage Reset The on-chip Low Voltage Detector (LVD) gener- ates a static reset when the supply voltage is be- low a reference value. The LVD works both during power-on as well as when the power supply drops (brown-out). The reference value for the voltage drop is lower than the reference value for power- on in order to avoid a parasitic reset when the MCU starts running and sinks current on the sup- ply (hysteresis). 1.1.5 I/O Ports The I/O lines are grouped into two I/O Ports and can be configured on a bit basis to provide timing, status signals, an address/data bus for timer in- puts and outputs, analog inputs, external wake-up lines and serial or parallel I/O. 1.1.6 3-phase Induction Motor Controller The IMC controller is designed for variable speed motor control applications. Three pairs of PWM outputs are available for controlling a three-phase motor drive. Rotor speed feedback is provided by capturing a tachogenerator input signal. Emergen- cy stop is provided by putting the PWM outputs in high impedance mode upon asynchronous faulty event on NMI pin. 1.1.7 Watchdog Timer (WDT) The Watchdog timer can be used to monitor sys- tem integrity. When enabled, it generates a reset after a timeout period unless the counter is re- freshed by the application software. For additional security, watchdog function can be enabled by hardware using a specific pin. 1.1.8 Standard Timer The standard timer includes a programmable 16- bit down-counter and an associated 8-bit prescaler with Single and Continuous counting modes. 1.1.9 Extended Function Timer The Extended Function Timer can be used for a wide range of standard timing tasks. It has a 16-bit free running counter with programmable prescal- er. Each timer can have up to 2 input capture and 2 output compare pins with associated registers. This allows applications to measure pulse inter- vals or generate pulse waveforms. Timer overflow and other events are flagged in a status register with optional interrupt generation. 1.1.10 Serial Peripheral Interface (SPI) The SPI bus is used to communicate with external devices via the SPI, or I²C bus communication standards. 1.1.11 Analog/Digital Converter (ADC) The ADC provides up to 6 analog inputs with on- chip sample and hold. The analog watchdog gen- erates an interrupt when the input voltage moves out of a preset threshold. 9 |
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Ähnliche Beschreibung - ST92141 |
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