Other Parts Discussed in Thread: MSP430FR6989
Hi Team,
I am using MSP430 MCU for power measurement unit so thinking to use ISO1541 Ic for programming isolation and referring document SLAU668.
On that i have couple of question:
1. I saw there is pull up on both sides of this Ic ISO1541 but both are different value? On one side it is of 1.5K, 30K, and on other side it is in ohm say 150E and 270E. Why like this?
2. Since i am going to use SPY-BI wire connection for programming so only RESET and SBWTCK will be used. On reset signal already there will be pull up of 47K resistor with one 0.1uF cap to keep MCU always out of reset. But now with this ISO1541 Ic pull up resistor will be like 47K parallel to 150E and that will have equivalent to 149E. So that wont be an issue during programming?
3. Can we replace 150E and 270E resistor with same 47K value?