TM4C1231D5PZ_15 Datasheet, PDF (52/1173 Pages) Texas Instruments – Tiva™ TM4C1231D5PZ Microcontroller

Architectural Overview
1.3.4.3
– Hibernate RTC oscillator (RTCOSC) clock that can be configured to be the 32.768-kHz
external oscillator source from the Hibernation (HIB) module or the HIB Low Frequency clock
source (HIB LFIOSC), which is located within the Hibernation Module.
■ Flexible reset sources
– Power-on reset (POR)
– Reset pin assertion
– Brown-out reset (BOR) detector alerts to system power drops
– Software reset
– Watchdog timer reset
– MOSC failure
Programmable Timers (see page 678)
Programmable timers can be used to count or time external events that drive the Timer input pins.
Each 16/32-bit GPTM block provides two 16-bit timers/counters 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). Each 32/64-bit Wide GPTM block provides two 32-bit timers/counters that
can be configured to operate independently as timersor event counters, or configured to operate
as one 64-bit timer or one 64-bit Real-Time Clock (RTC). Timers can also be used to trigger
analog-to-digital (ADC) conversions and DMA transfers.
The General-Purpose Timer Module (GPTM) contains six 16/32-bit GPTM blocks and six 32/64-bit
Wide GPTM blocks with the following functional options:
■ 16/32-bit operating modes:
– 16- or 32-bit programmable one-shot timer
– 16- or 32-bit programmable periodic timer
– 16-bit general-purpose timer with an 8-bit prescaler
– 32-bit Real-Time Clock (RTC) when using an external 32.768-KHz clock as the input
– 16-bit input-edge count- or time-capture modes with an 8-bit prescaler
– 16-bit PWM mode with an 8-bit prescaler and software-programmable output inversion of the
PWM signal
■ 32/64-bit operating modes:
– 32- or 64-bit programmable one-shot timer
– 32- or 64-bit programmable periodic timer
– 32-bit general-purpose timer with a 16-bit prescaler
– 64-bit Real-Time Clock (RTC) when using an external 32.768-KHz clock as the input
– 32-bit input-edge count- or time-capture modes with a16-bit prescaler
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June 12, 2014
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