Simulink Reset Config
When to use:
When to use:
- Watchdog timer configuration needed (auto-reset on software hang)
- Brown-out reset handling required (low voltage detection)
- Startup delay needed for sensor stabilization or power-up sequencing
- Custom reset behavior (preserve critical variables across reset)
- Logging reset sources for field diagnostics (POR, BOR, WDT, external)
When NOT to use:
- Default reset behavior sufficient — Master block configures basic reset settings
- No watchdog needed (not safety-critical, no hang risk)
- Simple applications with no special startup requirements
Related Blocks
Parameters
| Parameter | Description | Options |
|---|---|---|
| Reset Behavior | Action on system reset | • Initialize all variables |
| Watchdog Timer | Configure WDT operation | • Enabled (auto-reset) |
| Startup Delay | Initial delay before main loop | 0 to 1000 ms |
| Brown-out Handling | Low voltage detection behavior | • Reset on brown-out |
Reset Sources
| Source | Description | Typical Handling |
|---|---|---|
| Power-On Reset (POR) | Initial power application | Full initialization |
| Brown-Out Reset (BOR) | Voltage drop detection | Full initialization |
| Watchdog Timeout | WDT not serviced | Full reset, log error |
| Software Reset | Intentional reset command | Configurable (preserve state) |
| External Reset | MCLR pin assertion | Full initialization |
Example Configuration
% Safety-critical application with WDT
Reset Behavior: Initialize all variables
Watchdog Timer: Enabled, 1000ms period
Startup Delay: 100ms (allow power stabilization)
Brown-out: Reset on brown-out
% Log reset source in EEPROM for diagnostics
Usage Guidelines
- Always enable watchdog for safety-critical applications
- Use startup delay for sensor stabilization
- Log reset sources for field diagnostics
- Test all reset scenarios during validation