AM652X datasheet(261/299 Pages) TI1

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AM6548, AM6528, AM6546

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SPRSP08E – NOVEMBER 2017 – REVISED OCTOBER 2018

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Detailed Description

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Gamma correction

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Internal PLL clock recovery

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Digital display information protection

For more information, see section Display Subsystem (DSS) in chapter Peripherals of the device TRM.

6.11.7 eCAP

This section describes the Enhanced Capture (ECAP) module for the device.

The enhanced Capture (ECAP) module can be used for:

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Sample rate measurements of audio inputs

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Speed measurements of rotating machinery (for example, toothed sprockets sensed via Hall sensors)

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Elapsed time measurements between position sensor pulses

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Period and duty cycle measurements of pulse train signals

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Decoding current or voltage amplitude derived from duty cycle encoded current/voltage sensors.

The ECAP module includes the following features:

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32-bit time base counter

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4-event time-stamp registers (each 32 bits)

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Edge polarity selection for up to four sequenced time-stamp capture events

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Interrupt on any of the four events

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Single shot capture of up to four event time-stamps

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Continuous mode capture of time-stamps in a four-deep circular buffer

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Absolute time-stamp capture

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Difference (Delta) mode time-stamp capture

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All above resources dedicated to a single input pin

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When not used in capture mode, the ECAP module can be configured as a single channel PWM

output.

For more information, see section Enhanced Capture (ECAP) Module in chapter Peripherals of the device

TRM.

6.11.8 eHRPWM

An effective PWM peripheral must be able to generate complex pulse width waveforms with minimal CPU

overhead or intervention. It needs to be highly programmable and very flexible while being easy to

understand and use. The EPWM unit described here addresses these requirements by allocating all

needed timing and control resources on a per PWM channel basis. Cross coupling or sharing of resources

has been avoided; instead, the EPWM is built up from smaller single channel modules with separate

resources and that can operate together as required to form a system. This modular approach results in

an orthogonal architecture and provides a more transparent view of the peripheral structure, helping users

to understand its operation quickly.

In the further description the letter x within a signal or module name is used to indicate a generic EPWM

instance on a device. For example, output signals EPWMxA and EPWMxB refer to the output signals from

the EPWM_x instance. Thus, EPWM1A and EPWM1B belong to EPWM1, EPWM2A and EPWM2B

belong to EPWM2, and so forth.

Additionally, the EPWM integration allows this synchronization scheme to be extended to the capture

peripheral modules (ECAP). The number of modules is device-dependent and based on target application

needs. Modules can also operate stand-alone.

The device has six instances of EPWM modules.

Each EPWM module supports the following features:

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