Hi,
i 'm developing an PCB for the Delfino F2837x-Series.Therefore i wonna take some circuits from the controlCARD. In my mind there is an mistake at the reset-circuit on the controlCARD (Schematics: F2837x controlCARD Page 3 of 8)This circuit consists of two voltage-monitors (for 1.2V (Device U3) and 3.3V (Device U4)
U3 should monitor VDD_1V2, therefore there is an voltage divider to create a voltage over 0.5V on SENSE to get an OK-Signal at SENSE_OUT, if the voltage on SENSE is under 0.5V then on SENSE_OUT you get an NOT-OK-Signal
In the schematics there is an connection between VDD_3V3 und the SENSE Input of U3. Thus, the VDD_1V2 is no longer considered, at SENSE_OUT there is always the OK-Signal if VDD_3V3 is active,
VDD_1V2 is ignored. Isn't it ?
