LM3S1H11 Datasheet, PDF (47/956 Pages) Texas Instruments – Stellaris® LM3S1H11 Microcontroller

Stellaris^® LM3S1H11 Microcontroller
1.3.5.4
1.3.5.5
– 16-bit input-edge count- or time-capture modes
– 16-bit PWM mode with software-programmable output inversion of the PWM signal
■ Count up or down
■ Daisy chaining of timer modules to allow a single timer to initiate multiple timing events
■ ADC event trigger
■ User-enabled stalling when the microcontroller asserts CPU Halt flag during debug (excluding
RTC mode)
■ Ability to determine the elapsed time between the assertion of the timer interrupt and entry into
the interrupt service routine.
■ Efficient transfers using Micro Direct Memory Access Controller (µDMA)
– Dedicated channel for each timer
– Burst request generated on timer interrupt
CCP Pins (see page 539)
Capture Compare PWM pins (CCP) can be used by the General-Purpose Timer Module to time/count
external events using the CCP pin as an input. Alternatively, the GPTM can generate a simple PWM
output on the CCP pin.
The LM3S1H11 microcontroller includes eight Capture Compare PWM pins (CCP) that can be
programmed to operate in the following modes:
■ Capture: The GP Timer is incremented/decremented by programmed events on the CCP input.
The GP Timer captures and stores the current timer value when a programmed event occurs.
■ Compare: The GP Timer is incremented/decremented by programmed events on the CCP input.
The GP Timer compares the current value with a stored value and generates an interrupt when
a match occurs.
■ PWM: The GP Timer is incremented/decremented by the system clock. A PWM signal is generated
based on a match between the counter value and a value stored in a match register and is output
on the CCP pin.
Hibernation Module (see page 267)
The Hibernation module provides logic to switch power off to the main processor and peripherals
and to wake on external or time-based events. The Hibernation module includes power-sequencing
logic and has the following features:
■ 32-bit real-time counter (RTC)
– Two 32-bit RTC match registers for timed wake-up and interrupt generation
– RTC predivider trim for making fine adjustments to the clock rate
■ Two mechanisms for power control
– System power control using discrete external regulator
January 23, 2012
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