LM3S1439 Luminary Micro, Inc, LM3S1439 Datasheet - Page 29

• Manufacturer Part Number: LM3S1439
• Description: Lm3s1439 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

July 25, 2008
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QEI
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GPIOs
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Two PWM comparators
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PWM generator
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Dead-band generator
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Flexible output control block with PWM output enable of each PWM signal
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Can initiate an ADC sample sequence
Hardware position integrator 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 PhA/PhB/IDX for a 50-MHz system)
Interrupt generation on index pulse, velocity-timer expiration, direction change, and quadrature
error detection
14-52 GPIOs, depending on configuration
Output frequency controlled by a 16-bit load value
Load value updates can be synchronized
Produces output signals at zero and load value
Comparator value updates can be synchronized
Produces output signals on match
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
Produces two PWM signals with programmable dead-band delays suitable for driving a
half-H bridge
Can be bypassed, leaving input PWM signals unmodified
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
Synchronization of timer/comparator updates across the PWM generator blocks
Interrupt status summary of the PWM generator blocks
Preliminary
LM3S1439 Microcontroller
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