14.3.2.2 Reset Time

The Reset time can be divided into two parts.

The first part is when any of the Reset sources are active, which depends on the input to the Reset sources. The external Reset is active as long as the RESET pin is low. The Power-on Reset (POR) and the Brown-out Detector (BOD) are active when the supply voltage is below the Reset source threshold.

The second part is when all the Reset sources are released, and an internal Reset initialization of the device is done. If a Power Supply Reset Source has triggered the Reset, the time will increase by the start-up time specified in the Start-Up Time (SUT) bit field within the System Configuration 1 (FUSE.SYSCFG1) fuse. The internal Reset initialization time will increase if the Cyclic Redundancy Check Memory Scan (CRCSCAN) is set to run at start-up. It is possible to change this configuration in the CRC-on-Boot (CRCBOOT) bit field section in the System Configuration 0 (FUSE.SYSCFG0) fuse.