Overview

Ameba series products provide multiple timers for user applications:

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• 10 Basic Timers:

  • TIM0-TIM7: Low-frequency Basic Timers (SDM32K clock source)

  • TIM10-TIM11: High-frequency Basic Timers (XTAL40M clock source)

• 1x 8-channel PWM Timer: TIM8

• 1x 1-channel Capture Timer: TIM9

• 1x 32-bit Debug Timer

• 2 sets of PMC Timers

Basic Timer

Features

• 32-bit up-counter

• Overflow interrupt generation

• Preloadable auto-reload register

• Sleep mode operation with interrupt wakeup capability

Application Examples

SDK provides two implementation types for Basic Timer:

• mbed Examples

  • Path: {SDK}\component\example\peripheral\mbed\Timer\mbed_gtimer\{demo}

  • Demonstrates Basic Timer control in mbed environment

• raw Examples

  • Path: {SDK}\component\example\peripheral\raw\Timer\raw_gtimer\{demo}

  • Demonstrates direct register-level Basic Timer control

Note

Check example’s README.md for supported chip information.

PWM Timer

Features

• 16-bit up-counter

• Preloadable auto-reload register

• 16-bit programmable prescaler

• Independent PWM generation per channel

• Supported interrupts:

  • Counter overflow

  • Software update event

  • Channel counter overflow

  • Channel capture/compare

• Operation modes:

  • PWM mode: Configurable duty cycle and period

  • Input capture: Edge-triggered counter capture

  • One-pulse mode: Programmable delayed pulse generation

Application Examples

SDK provides two implementation types for PWM Timer:

• mbed Examples

  • Path: {SDK}\component\example\peripheral\mbed\Timer\mbed_pwm

  • Demonstrates PWM control in mbed environment

• raw Examples

  • Path: {SDK}\component\example\peripheral\raw\Timer\{demo}

  • Demonstrates direct register-level PWM control

Key implementations:

• raw_pwm: PWM mode demo

• raw_tim_capture_pwm_32k: Input capture demo

• raw_tim_pwm_one_pulse: One-pulse mode demo

Note

Check example’s README.md for supported chip information.

Capture Timer

Features

• 16-bit up-counter

• 16-bit programmable prescaler

• Preloadable auto-reload register

• Operation modes:

  • Pulse width measurement

  • Pulse counting within configurable window

Application Examples

SDK provides raw implementation examples for Capture Timer:

• Path: {SDK}\component\example\peripheral\raw\Timer\{demo}

• Demonstrates direct register-level capture control

Key implementations:

• raw_tim_pulse_width_32k: Pulse width measurement

• raw_tim_pulse_num_32k: Pulse counting implementation

Note

Check example’s README.md for supported chip information.

Debug Timer

Features

• Dual clock sources:

  • XTAL40M: 1μs resolution (1MHz from 40MHz crystal)

  • SDM32K: 31μs step per 30.5μs period

• Sleep mode persistence

• A lock-free counter: atomic counter access for multi-core systems

PMC Timer

Features

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• 2 sets of PMC Timers (each set contains 4 counters):

  • Sleep countdown counter

  • Deepsleep countdown counter

  • Wakeup counter

  • Reserved counter

• 32-bit width down counter (stops automatically when reaching 0)

• Configurable interrupt generation upon reaching 0

• SDM32K clock source

• Timer countdown value can be reset during operation