I have a project idea to control SCRs connected to three phase electric heater.
I need to know which phase is behind and which phase is ahead with respect to selected/chosen phase.
IMO, three pins with interrupts attached to them may satisfy the need.
Each interrupt will be driven/triggered by seperate zero crossing circuits.
After deciding which phase leading which one lagging, I may be capable to fire the SCRs at desired angles.
Could someone tell me which msp430gXYZ chip is suitable for the job and has available (more than one) interrupt pins?