Please review my design....

[perpetual_dream]

Hey,
I designed this schematic diagram for a RS-232, PIC16F628 microcontroller and a stepper motor. The aim of the design is to control the stepper motor from the serial port through a microcontroller interface. I am not sure about what should be connected to the oscilattor inputs of the microcontroller if any. plz review my hole design... I know that I have asked many questions so far on this subject but excuse me Im really busy working on a c# code for the same project and do really need ur help when it comes to the microcontroller phase of the project at which it's my 1st working project.
Please find my design attached.

 

[akg]

ur ckt around the 1489 and PIC is incomplete . i would prefer u first take a look at
http://winpicprog.co.uk/pic_tutorial_rs232_board.htm
and USART section of 628A datasheet

 

[perpetual_dream]

Ok this is my new design
Can u review it now ? I used Nigel Goodwin tutorial

 

[akg]

i didn't check around the driver , but the dia seems to be ok.. but u have not connected the T* pins .

 

[perpetual_dream]

What are the T * pins?

 

[akg]

the TIN/TOUT pins .. don't u require that .?

 

[perpetual_dream]

dont think so.... what are they 2b used for? are they for the microcontroller?

 

[Nigel Goodwin]

the TIN/TOUT pins .. don't u require that .?

He doesn't need them, he's only receiving, not transmitting.

 

[perpetual_dream]

ok thnx

 

[akg]

He doesn't need them, he's only receiving, not transmitting.

i overlooked his aim