LM3S818 Luminary Micro, Inc, LM3S818 Datasheet - Page 144

• Manufacturer Part Number: LM3S818
• Description: Lm3s818 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

General-Purpose Timers
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General-Purpose Timers
Programmable timers can be used to count or time external events that drive the Timer input pins.
The LM3S818 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 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
February 6, 2007