1.41.15 Reset Controller (RSTC)
The Reset Controller (RSTC) handles all the resets of the system and generates following reset signals:
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Processor Reset: Resets processor and also resets the Watchdog Timer
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Peripheral Reset: Resets the peripheral
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External Reset: Drives the NRST pin
The following are the sources of reset:
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General Reset: A general reset occurs when a VDDIO poweronreset is detected, a brownout or a voltage regulation loss is detected by the Supply Controller.
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Backup Reset: A backup reset occurs when the chip exits from Backup mode.
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Watchdog Reset: The watchdog reset occurs when it times out
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Software Reset: The RSTC offers commands to assert processor reset and external reset
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User Reset: A user reset is generated when a low level is detected on the NRST pin
Using The Library
The RSTC Peripheral library provides API's for the following:
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To generate a software reset to reset the processor and all the embedded peripherals including the memory.
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To find the cause of last device reset
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Poll the NRST pin status or register interrupt callback when it is used as GPIO
Library Interface
Reset Controller peripheral library provides the following interfaces:
Functions
| Name | Description |
|---|---|
| RSTC_Initialize | Initializes RSTC module with the user configuration |
| RSTC_Reset | Resets the processor and all the embedded peripherals including the memory system and, in particular, the Remap Command or this function asserts NRST Pin |
| RSTC_NRSTPinRead | Reads the NRST pin level, sampled on each "Master Clock(MCK)" rising edge |
| RSTC_ResetCauseGet | Reports the cause of the last reset |
| RSTC_CallbackRegister | Allows application to register callback with PLIB |
Data types and constants
| Name | Type | Description |
|---|---|---|
| RSTC_RESET_CAUSE | Struct | Identifies the type of reset |
| RSTC_RESET_TYPE | Enum | Identifies the type of reset, either Processor reset or External Reset |
| RSTC_CALLBACK | Typedef | RSTC Callback Function Pointer |