Datasheet

– Low Frequency Internal Oscillator (LFIOSC): On-chip resource used during power-saving
modes
– 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
– Hibernation module event
– MOSC failure
1.3.9.3 Programmable Timers (see page 1102)
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). Timers can also be used to trigger analog-to-digital (ADC) conversions
and DMA transfers.
The General-Purpose Timer Module (GPTM) contains eight 16/32-bit GPTM blocks with the following
functional options:
■ 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
– The System Clock or a global Alternate Clock (ALTCLK) resource can be used as timer clock
source. The global ALTCLK can be:
• PIOSC
• Hibernation Module Real-time clock output (RTCOSC)
• Low-frequency internal oscillator (LFIOSC)
December 13, 201378
Texas Instruments-Advance Information
Architectural Overview