LM3S6110 Datasheet, PDF (39/610 Pages) Texas Instruments – Stellaris® LM3S6110 Microcontroller

Stellaris^® LM3S6110 Microcontroller
1.4.1.5
1.4.1.6
1.4.2
1.4.2.1
1.4.3
1.4.3.1
System Control Block (SCB) (see page 89)
The SCB provides system implementation information and system control, including configuration,
control, and reporting of system exceptions.
Memory Protection Unit (MPU) (see page 89)
The MPU supports the standard ARMv7 Protected Memory System Architecture (PMSA) model.
The MPU provides full support for protection regions, overlapping protection regions, access
permissions, and exporting memory attributes to the system.
Motor Control Peripherals
To enhance motor control, the LM3S6110 controller features Pulse Width Modulation (PWM) outputs.
PWM
Pulse width modulation (PWM) is a powerful technique for digitally encoding analog signal levels.
High-resolution counters are used to generate a square wave, and the duty cycle of the square
wave is modulated to encode an analog signal. Typical applications include switching power supplies
and motor control.
On the LM3S6110, PWM motion control functionality can be achieved through:
■ Dedicated, flexible motion control hardware using the PWM pins
■ The motion control features of the general-purpose timers using the CCP pins
PWM Pins (see page 499)
The LM3S6110 PWM module consists of one PWM generator blocks and a control block. Each
PWM generator block contains one timer (16-bit down or up/down counter), two comparators, a
PWM signal generator, a dead-band generator, and an interrupt. The control block determines the
polarity of the PWM signals, and which signals are passed through to the pins.
Each PWM generator block produces two PWM signals that can either be independent signals or
a single pair of complementary signals with dead-band delays inserted. The output of the PWM
generation blocks are managed by the output control block before being passed to the device pins.
CCP Pins (see page 304)
The General-Purpose Timer Module's CCP (Capture Compare PWM) pins are software programmable
to support a simple PWM mode with a software-programmable output inversion of the PWM signal.
Fault Pin (see page 504)
The LM3S6110 PWM module includes one fault-condition handling input to quickly provide low-latency
shutdown and prevent damage to the motor being controlled.
Analog Peripherals
For support of analog signals, the LM3S6110 microcontroller offers three analog comparators.
Analog Comparators (see page 486)
An analog comparator is a peripheral that compares two analog voltages, and provides a logical
output that signals the comparison result.
June 18, 2012
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Texas Instruments-Production Data