Important changes to forums and questions
All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.
10 years, 5 months ago.
characteristics of the mbed legs?
characteristics of the mbed legs? that is to say : input, output ... I am creating an impression / mbed library for Proteus / isis
P1: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P2: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P3: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P4: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P5: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P6: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P7: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P8: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P9: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P10: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P11: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P12: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P13: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? P14: Passive ? Inpuut ? Output ? Pull-up ? Pull-down ? Power-pin ? . . . . . . . . . . . . P40 ?
Thank you for your answers
1 Answer
10 years, 5 months ago.
Unused IO pins (p5-p30) default to input with the internal pullup enabled.
AFAIK, the chip defaults(power up/reset) to the "input with the internal pullup enabled." as Andy mentioned.
You get the priviledge of setting up the pins for the functions that you want. so for example the PWM pins
need to be configured for pwm / output / ??pullup-pulldown?? / timer source etc.
Some chips and their pins can have upto 8 functions capable on a pin (one at a time- though). That's where
the "matrix" comes into play. You are the captain of your ship/mcu !!!!
which mbed platform??
posted by Gary Z 22 May 2015Mbed nxp lcp 1768
posted by AGON Juppé 22 May 2015