ST92141 datasheet(7/179 Pages) STMICROELECTRONICS

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.

ST92141 数据表(PDF) 7 Page - STMicroelectronics

ST92141 数据表(HTML) 7 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载