NRESET IN

The nRESET_IN pin (also RESET_EXT) is used to reset the Colibri module.

Common Specification

• It has to be asserted for at least 35ms for proper resetting the module.
• Low Voltage max. 0.4V
• High Voltage min. 2.3V
• It is weak Pull-up'd on the Colibri modules. If externally used, use an additional 10k Pull-up.

Also the Voltage monitoring can reset the module if the voltage drops.

Specification for the different modules

Colibri PXA270 with TPS65020

• Time Low Min. 35ms (Deglitch)
• High Voltage Min. 1.37V
• Low Voltage Max. 0.4V

Colibri PXA3xx with MAX8660

• Time Low Min. 1 uS
• High Voltage Min. 1.4V
• Low Voltage Max. 0.4V

Colibri PXA3xx with LP3972

• Time Low Min. tdb
• High Voltage Min. 2.3V
• Low Voltage Max. 0.5V

Colibri T20

• Time Low Min. 16 uS
• Time Low Max. 60 mS
• Low Voltage Max. 0.4V