User manual

General-Purpose Timers

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13.1 General-Purpose Timers

Programmable timers can be used to count or time external events that drive the timer input pins. The

CC26xx General-Purpose Timer Module (GPTM) provides two 16-bit timers (referred to as timer A and

timer B) that can be configured to operate independently as timers, or concatenated to operate as one 32-

bit timer.

The GPT is one timing resource available on the CC26xx microcontroller. Other timer resources include

the System Timer (SysTick) and the Watchdog Timer. See Section 3.2.1, SysTick, and Chapter 15,

Watchdog Timer, for reference.

The GPTM contains four GPTM blocks with the following functional options:

• Operating modes:

– 16 with 8-bit prescaler or 32-bit programmable one-shot timer

– 16 with 8-bit prescaler or 32-bit programmable periodic timer

– Two Capture Compare PWM pins (CCP) for each 32-bit timer

– 24-bit input edge count or 24-bit time-capture modes

– 24-bit PWM mode with software-programmable output inversion of the PWM signal

• Count up or down

• Daisy-chaining of timer modules to allow a single timer to initiate multiple timing events

• Timer synchronization to allow selected timers to start counting on the same clock cycle

• User-enabled stalling when the microcontroller asserts a CPU Halt flag during debug

• Ability to determine the elapsed time between the assertion of the timer interrupt and entry into the

interrupt service routine

13.2 Block Diagram

Figure 13-1 shows the GPTM module block diagram.

1074

Timers SWCU117A–February 2015–Revised March 2015

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