Dual-Mode Timer - Texas Instruments OMAP5912 Reference Manual

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Dual-Mode Timer

This peripheral is a 32-bit timer with the following features:

Counter timer with compare and capture modes

Autoreload mode

Start-stop mode

Programmable divider clock source

16-/32-bit addressing

On the fly read/write registers

Interrupts generated on overflow, compare, and capture

Interrupt enable

Wake-up enable

Write posted mode

Dedicated input trigger for capture mode and dedicated output

trigger/PWM signal

The timer module contains a free-running upward counter with autoreload

capability on overflow. The timer counter can be read and written on the fly

(while counting). The timer module includes compare logic to allow interrupt

event on programmable counter matching value. A dedicated output signal

can be pulsed or toggled on overflow and match event. This offers timing

stamp trigger signal or PWM (pulse width modulation) signal sources. A

dedicated input signal can be used to trigger automatic timer counter capture

and interrupt event, on programmable input signal transition type. A

programmable clock divider (prescaler) allows reduction of the timer input

clock frequency. All internal timer interrupt sources are merged into one

module interrupt line and one wake-up line. Each internal interrupt source can

be independently enabled/disabled with a dedicated bit of the TIER register

for the interrupt features and a dedicated bit of TWER for the wake-up.

For each timer implemented in OMAP5912, there are three possible clock

The 32-kHz clock

The system clock

An external clock source

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