LM3S316 Luminary Micro, Inc., LM3S316 Datasheet - Page 155

• Manufacturer Part Number: LM3S316
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

9
April 27, 2007
General-Purpose Timers
Programmable timers can be used to count or time external events that drive the Timer input pins.
The LM3S316 controller General-Purpose Timer Module (GPTM) contains three GPTM blocks
(Timer0, Timer1, and Timer 2). Each GPTM block provides two 16-bit timer/counters (referred to
as TimerA and TimerB) that can be configured to operate independently as timers or event
counters, or configured to operate as one 32-bit timer or one 32-bit Real-Time Clock (RTC).
Timers can also be used to trigger analog-to-digital (ADC) conversions. The trigger signals from all
of the general-purpose timers are ORed together before reaching the ADC module, so only one
timer should be used to trigger ADC events.
The General-Purpose Timer Module is one timing resource available on the Stellaris
microcontrollers. Other timer resources include the System Timer (SysTick) (see “System Timer
(SysTick)” on page 38) and the PWM timer in the PWM module (see “PWM Timer” on page 356).
The following modes are supported:
32-bit Timer modes:
–
–
–
–
16-bit Timer modes:
–
–
–
–
16-bit Input Capture modes:
–
–
16-bit PWM mode:
–
Programmable one-shot timer
Programmable periodic timer
Real-Time Clock using 32.768-KHz input clock
Software-controlled event stalling (excluding RTC mode)
General-purpose timer function with an 8-bit prescaler
Programmable one-shot timer
Programmable periodic timer
Software-controlled event stalling
Input edge count capture
Input edge time capture
Simple PWM mode with software-programmable output inversion of the PWM signal
Preliminary
LM3S316 Data Sheet
155