Difference between MC9S12H256 and MC9S12DP256

Started by Naheed M K August 13, 2003
Hello,
Can I user PWM ports output from DP256 directly to the servo motor.
Does it have protection against ove sinking ?
Or is that above is possible only in H256 ?

Thanks
Naheed



In a message dated 8/13/03 11:32:34 AM Eastern Daylight Time,
writes:
Can I user PWM ports output from DP256 directly to the servo motor.
Does it have protection against ove sinking ?
Or is that above is possible only in H256 ?
=========================================
The datasheet gives the voltage and current capabilities of the pins. CPU
pins are usually ttl logic levels... 5 v at a few ma. Cant drive much of a motor
with that can you? Without a doubt, you need a big h bridge that will put out
whatever voltage and current your motor wants. Seems logical when you think
about it.



If you are talking about a standard hobby servo, it has a 3 pin
connector with power, ground and control. The PWM outputs from the HC12
are perfectly suited to drive the control input directly. Just make
sure the ground reference for the HC12 is the same as the ground
reference for the power supply that you connect to the power input of
the servo.

Jim

wrote:

> In a message dated 8/13/03 11:32:34 AM Eastern Daylight Time,
> writes:
> Can I user PWM ports output from DP256 directly to the servo motor.
> Does it have protection against ove sinking ?
> Or is that above is possible only in H256 ?
> =========================================
> The datasheet gives the voltage and current capabilities of the pins. CPU
> pins are usually ttl logic levels... 5 v at a few ma. Cant drive much of a motor
> with that can you? Without a doubt, you need a big h bridge that will put out
> whatever voltage and current your motor wants. Seems logical when you think
> about it. >
> -------------------- >
> ">http://docs.yahoo.com/info/terms/