H48C 5V to 3.3V series resistor on which pins? (answered)

bulkhead

┌──────────┐
  P2 ──│1 ‣‣••6│── +5V       P0 = CS
         │  ┌°───┐  │               P1 = DIO
  P1 ──│2 │ /\ │ 5│── P0        P2 = CLK
         │  └────┘  │
 VSS ──│3  4│── Zero-G  
         └──────────┘

From that schematic, which pins need a series resistor to lower the voltage to the prop? Would it be okay if I just put them on all 3?

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
I'm new to the propeller!

Post Edited (bulkhead) : 8/3/2007 2:13:30 AM GMT

Mike Green

I would suggest putting them on all the pins (P0,P1,P2). Even though P0 and P2 are output only (to the H48C), all Propeller I/O pins are initialized to inputs and mistakes can be made.

bulkhead

Thanks Mike, I'll just put 1k resistors on each then.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
I'm new to the propeller!