LM3S8971 Datasheet, PDF (27/577 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S8971 Microcontroller
■ Analog Comparators
– One integrated analog comparator
– Configurable for output to: drive an output pin, generate an interrupt, or initiate an ADC sample
sequence
– Compare external pin input to external pin input or to internal programmable voltage reference
■ PWM
– Three PWM generator blocks, each with one 16-bit counter, two comparators, a PWM
generator, and a dead-band generator
– One 16-bit counter
• Runs in Down or Up/Down mode
• Output frequency controlled by a 16-bit load value
• 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
• Synchronization of timer/comparator updates across the PWM generator blocks
• Interrupt status summary of the PWM generator blocks
October 01, 2007
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Preliminary