LM3S1637_16 Datasheet, PDF (40/701 Pages) Texas Instruments – Stellaris LM3S1637 Microcontroller

Architectural Overview
• Load value updates can be synchronized
• Produces output signals at zero and load value
– Two PWM comparators
• Comparator value updates can be synchronized
• Produces output signals on match
– PWM generator
• Output PWM signal is constructed based on actions taken as a result of the counter and
PWM comparator output signals
• Produces two independent PWM signals
– Dead-band generator
• Produces two PWM signals with programmable dead-band delays suitable for driving a
half-H bridge
• Can be bypassed, leaving input PWM signals unmodified
– Flexible output control block with PWM output enable of each PWM signal
• PWM output enable of each PWM signal
• Optional output inversion of each PWM signal (polarity control)
• Optional fault handling for each PWM signal
• Synchronization of timers in the PWM generator blocks
• Interrupt status summary of the PWM generator blocks
– Can initiate an ADC sample sequence
■ QEI
– Position integrator that tracks the encoder position
– Velocity capture using built-in timer
– The input frequency of the QEI inputs may be as high as 1/4 of the processor frequency (for
example, 12.5 MHz for a 50-MHz system)
– Interrupt generation on:
• Index pulse
• Velocity-timer expiration
• Direction change
• Quadrature error detection
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July 15, 2014
Texas Instruments-Production Data