I have an 08M soldered into a circuit, and I'm figuring out how to program it on the board without disturbing any other components. The 10K and 22K resistors are already in the circuit.
To do this programming, I would like to deliver the +5, ground, program in, and program out signals from a separate connector while the board is not powered up through the on-board regulator (board is physically disconnected from normal 12v supply).
That means I will be delivering the +5v after the regulator (LM2931cm), which I know is normally frowned upon. The only component connected to the regulator on the 12v supply side is a .22uF ceramic capacitor, and a 100uF capacitor on the 08M side.
I'm thinkiing that this will be safe (regulator will not be harmed), but I'm not sure. Am I right?
To do this programming, I would like to deliver the +5, ground, program in, and program out signals from a separate connector while the board is not powered up through the on-board regulator (board is physically disconnected from normal 12v supply).
That means I will be delivering the +5v after the regulator (LM2931cm), which I know is normally frowned upon. The only component connected to the regulator on the 12v supply side is a .22uF ceramic capacitor, and a 100uF capacitor on the 08M side.
I'm thinkiing that this will be safe (regulator will not be harmed), but I'm not sure. Am I right?