LM3S8971 Luminary Micro, Inc, LM3S8971 Datasheet - Page 210
LM3S8971
Manufacturer Part Number
LM3S8971
Description
Lm3s8971 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S8971.pdf
(602 pages)
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General-Purpose Timers
10
10.1
210
General-Purpose Timers
Programmable timers can be used to count or time external events that drive the Timer input pins.
The Stellaris
Timer 2, and Timer 3). 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
Other timer resources include the System Timer (SysTick) (see “System Timer (SysTick)” on page 43)
and the PWM timer in the PWM module (see “PWM Timer” on page 477).
The following modes are supported:
■
■
■
■
Block Diagram
Note:
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 (for one-shot and periodic modes only)
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
In Figure 10-1 on page 211, the specific CCP pins available depend on the Stellaris
See Table 10-1 on page 211 for the available CCPs.
®
General-Purpose Timer Module (GPTM) contains four GPTM blocks (Timer0, Timer1,
Preliminary
®
microcontrollers.
July 26, 2008
®
device.
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