Microstepping with L6506, L6503 and LPC2138

[oldik]

Hello all,
Im, newbie here. I have a problem with my diploma work, I have to drive stepper motors with microstepping, I use two H bridge L6203 and one bridge L6506. I have development kit with arm7 - LPC2138, but there is 3,3V logic and L6506 need higher supply voltage, I dont know if it woud be ok, if I use 3,3V in procesor and 5V in driver L6506.
Thanks of all idea.
Oldriska

[jeffs555]

Usually, you can drive inputs on 5 volt parts from outputs on 3.3v parts, but you need to look at the data sheets for both parts to be sure. You generally can't drive inputs on 3.3v parts from outputs on 5v parts, without using a voltage divider.

[kreutz]

Go to the Texas Instruments website ( www.ti.com ) search under "Dual supply Level Translators" or " Dual supply translator" and you will find what you need.