If options Open-drain RESET drive mode and Latch target RESET are enabled in Hardware | CPU Options | Reset, BlueBox will hold the RESET line low whenever an external RESET pulse is detected. On some targets, the RESET line may become noisy enough that the BlueBox falsely detects external reset pulses.
In such cases, the BlueBox will interpret the noise as an external reset event and actively drive the line low. Consequently, winIDEA displays the message in the Progress window:
External reset detected – possible watchdog activity
even when no external source is actively pulling the RESET line low. As a result, the target SoC will reset unintentionally.
1. Disable Latch target RESET option in Hardware | CPU Options | Reset.
This prevents the BlueBox from holding the RESET line low in response to transient noise pulses.
2. Select Push-pull RESET drive mode.
The BlueBox actively drives the RESET line high, reducing noise sensitivity. Make sure that no other reset sources are connected to the RESET line when using Push-pull mode.