Hi,
I am using the TMS320F28377S MCU on a custom board. When powering up the board, there are times where the board goes into an undefined state. When this happens we just reset the board using a switch tied to the XRS pin. This does not happen every time we power-up, some times we power up with no problem. Currently we have a RC circuit attached to the XRS pin as described in Section 5.9.2 of the data sheet.
In order to fix this we are looking to add a voltage supervisor circuit to monitor the 3.3V rail and/or the 1.2V rail during power-up. To help, I am looking for the following information:
-The 3.3V rail voltage and 1.2V rail voltage where the Power on reset releases the XRS pin
-The 3.3V and 1.2V brown out voltages, per the datasheet, section 5.4, the recommended operating 3.3 rail min is 3.14V and the 1.2 rail min is 1.14V. However, brown-out voltage is not listed.
-Any recommendation on a voltage supervisor with 100mV or more of hysteresis.
Thank you.
Best,
Jeremy Bower
