LM3S2016 Datasheet, PDF (174/468 Pages) List of Unclassifed Manufacturers – Microcontroller

General-Purpose Timers
9 General-Purpose Timers
Programmable timers can be used to count or time external events that drive the Timer input pins.
The Stellaris^® General-Purpose Timer Module (GPTM) contains two GPTM blocks (Timer0 and
Timer1). Each GPTM block provides two 16-bit timers/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 36).
The following modes are supported:
■ 32-bit Timer modes
– Programmable one-shot timer
– Programmable periodic timer
– Real-Time Clock using 32.768-KHz input clock
– Software-controlled event stalling (excluding RTC mode)
■ 16-bit Timer modes
– General-purpose timer function with an 8-bit prescaler (for one-shot and periodic modes only)
– Programmable one-shot timer
– Programmable periodic timer
– Software-controlled event stalling
■ 16-bit Input Capture modes
– Input edge count capture
– Input edge time capture
■ 16-bit PWM mode
– Simple PWM mode with software-programmable output inversion of the PWM signal
9.1 Block Diagram
Note: In Figure 9-1 on page 175, the specific CCP pins available depend on the Stellaris^® device.
See Table 9-1 on page 175 for the available CCPs.
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November 30, 2007
Preliminary