MotoHawk:Blocks:PWM Output

PWM Output

This MotoHawk™ block is configurable for controlling pulse-width modulation (PWM) output.

Block ID

motohawk_pwm

Library

MotoHawk_lib/Analog I/O Blocks

Description

This MotoHawk™ block allows the attributes of pulse-width modulated (PWM) output to be modified. Frequency and dutycycle are the two key attributes. Dutycycle defines the percentage of the period (which is specified by the frequency) that the resource will be turned on (assert). Thus a low side driver output resource will sink current into the driver switch for the percentage of the period specified by the dutycycle. On the other hand, a highside driver output resource would source current for the percentage of the period defined by the dutycycle.

The MotoHawk™ PWM Output help topic provides more detail on this block.

Also see the Synchronized PWM MotoHawk™ help topic.

Block Parameters

Parameter Field	Values	Comments/Description
Resource	Drop-down list	Select from available resource, per target ECU, such as H-bridge, etc.
Minimum Frequency (.01 Hz)	Numeric	Data type is uint32. The Frequency input is uint32, ranging from 119 to 19988175. Each unit represents 0.01Hz. Allows the system to select appropriate clock dividers resulting in the best possible duty cycle and frequency granularity.
Input Enable	Check box (enable)	When "Input Enable" is checked, the output may be dynamically controlled. When disabled, the output transistors are completely turned off, which will stop all current, but also disable any diagnostics.
Input Brake	Check box (enable)	Select to stop PWM output. Not supported by all ECUs.
Output Current	Check box (enable)	When "Output Current" is checked, the drive current in milliamps is provided.
Output Fault Status	Check box (enable)	When "Output Fault Status" is checked, a value indicating fault status is provided. This value is one of: 0 - OK 1 - Fault 2 - Indeterminate
Use as parent for synchronized PWM	Check box (enable)	When "Use as parent for synchronized PWM" is checked, a Synchronized PWM Child block may be used to reference this block.
Allow I/O pin to be calibrated from MotoTune	Check box (enable)	Name, Access Levels and MotoTune Group Strings fields available
Name	Alpha-numeric text, single-quote enclosed	Name as displayed in MotoTune, for block. No special characters, such as spaces, dashes, commas (underscore allowed)
Read Access Level	1-4	Sets security level 1 lowest, 4 highest, for user access to read value
Write Access Level	1-4	Sets security level 1 lowest, 4 highest, for user access to write value
MotoTune Group String	Alpha-numeric text, single-quote enclosed	Determines Folder name and hierarchy as displayed in MotoTune. Use "|" character between folder names to delineate subfolder structure