uM-PWM1 Servo Coprocessor

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uM-PWM1

Introduction
Features
Applications
Pin Descriptions
Documentation
  

Introduction

The uM-PWM1 chip is designed to work with pulse-width modulated signals used for remote control servo applications. It provides up to 8 input channels for monitoring pulse widths and 8 output channels for producing pulse width modulated (PWM) signals at either 50 Hz or a selectable frequency from 10 to 450 Hz. It can be interfaced with a microcontroller using an I2C or serial data interface.

Features

  • internal oscillator
  • I2C bus interface (up to 400 Kbps)
  • serial data interface
  • up to 8 input channels
    • pulse widths measured with 1 microsecond accuracy
    • pulse count
    • high time
    • low time
    • frequency
  • provides decoding of Pulse Position Modulation (PPM) input signal
  • 8 output channels
  • pulse widths generated with 1 microsecond accuracy
  • selectable output channel frequency
    • standard frequency (50 Hz)
    • alternate frequency (from 10 to 450 Hz)
  • pulse widths restricted to specified range
    • 800 to 2200 microseconds standard pulse widths
    • 500 to 2500 extended pulse widths
  • output channel movements can be coordinated and synchronized
  • speed and time of output channel movements can be controlled
  • provides encoding of Pulse Position Modulation (PPM) output signal
  • 5V operating voltage
  • RoHS compliant

  • Applications

    • remote control servos
    • controlling radio-control models
    • UAV
    • robotics
    • automation
    • special effects

    Pin Diagram and Pin Descriptions

    PDIP-28, SOIC-28 
     Pin   Name  Type  Description
    1  /MCLR  Input  Master Clear (Reset)
    2  IN0  Input  Input Channel 0
    3  IN1  Input  Input Channel 1
    4  IN2  Input  Input Channel 2
    5  IN3  Input  Input Channel 3
    6  IN4  Input  Input Channel 4
    7  IN5
     PPMIN
     Input  Input Channel 5
     PPM Input
    8  VSS  Power  Digital Ground
    9  N/C    No connection
    10  N/C    No connection
    11  IN6
     TX
     Input
     Output
     Input Channel 6
     Serial Output
    12  IN7
     RX
     Input  Input Channel 7
     Serial Input
    13  VDD  Power  Digital Supply Voltage
    14  SEL  Input  +5V RX/TX enabled
     0v IN6/IN7 enabled
    15  OUT7
     PPMOUT
     Output  Output Channel 7
     PPM Output
    16  OUT6  Output  Output Channel 6
    17  SCL  Input  I2C Clock
    18  SDA  In/Out  I2C Data
    19  VSS  Power  Digital Ground
    20  VDD  Power  Digital Supply Voltage
    21  OUT5  Output  Output Channel 5
    22  OUT4  Output  Output Channel 4
    23  OUT3  Output  Output Channel 3
    24  OUT2  Output  Output Channel 2
    25  OUT1  Output  Output Channel 1
    26  OUT0  Output  Output Channel 0
    27  AVSS  Power  Analog Ground
    28  AVDD  Power  Analog Supply Voltage

    Documentation

    uM-PWM1 Datasheet
    Functional description and hardware specifications.
     
    800 KB PDF Sep 19, 2014

      
      
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