Other Parts Discussed in Thread: MSP430F5438A, MSP430F5419A
Hello,
My customer has had some experience with the MSP430F5419A / MSP430F5438A from several years ago in very low power designs.
At that time, they had run into issues on one assembly that was using several internal pull-ups / pull-downs in the design. The board was power cycled at -40C and after booting up, was unable to drive to the lowest loop current value. The issue was traced to the silicon resistor values (35K at ambient) and the wide TC effects.
Today they are testing a design using the RM44L520APZT also in a semi low power application. The processor port map indicates internal pull-ups / pull-downs are used. The data sheet does not indicate the silicon resistor values, only the drive current (20uA and 100uA at ambient). Some of the port pins have internal pull-ups / pull-downs in parallel with discrete resistors that are populated on the assembly, placing the resistors in parallel and reducing the overall resistor values.
Could someone please advise what the internal pull-up / pull-down resistor values are, in Ohms like in the above example?
Also are there any diagrams, like below for the RM44L520APZT?
