How to design RS232 adapter ?

Installing and using VSIDE tools for VLSI Solution's devices that contain a VSDSP signal processor.
Post Reply
Churmenton
Senior User
Posts: 80
Joined: Wed 2012-07-11 15:58

How to design RS232 adapter ?

Post by Churmenton » Tue 2013-03-05 10:18

hi support,
Apologise!
Because we only have one VSIDE USB UART Cable, I want to design a RS232 adapter,like
23))GE4FSNH8}{D7_XIJ)CI.jpg
RS232 adapter
23))GE4FSNH8}{D7_XIJ)CI.jpg (6.57 KiB) Viewed 2039 times
But i don't know how to let 9 holes become 4 pins,especially,there is a power pin among the 4 pins.So,can you tell me how to design it?If you are patient,please send me the circuit diagram of RS232 adapter,and some necessary drive program!thanks

User avatar
Panu
VLSI Staff. Currently on holiday.
Posts: 2698
Joined: Tue 2010-06-22 13:43

Re: How to design RS232 adapter ?

Post by Panu » Tue 2013-03-05 21:56

Hi!

The adaptor is based on MAX3232 IC. The diagram should be in the MAX3232 datasheet. 5 caps and the MAX3232 IC is required. I can also try to find the gerbers for you, but it's really easy to design yourself. No driver is required. Only 4 pins are required. The 5th pin (PC DTR->MAX3232->pin 4) is not used in VLSI designs after all... (the required 4 pins are GND, RX, TX and power)
Because we only have one VSIDE USB UART Cable
It should be easy to find a Prolific PL2302 compatible USB-UART IC in the Shenzhen area, this kind of cable should be easy to source/make.
especially,there is a power pin among the 4 pins.
The cables are different. The MAX3232 cable takes IOVDD power from the VS10xx board. The USB UART cable provides 5v power to the VS10xx board.

-Panu
Info: Line In and Line Out, VS1000 User interface, Overlay howto, Latest VSIDE, MCU Howto, Youtube
Panu-Kristian Poiksalo, VLSI Solution Oy

Post Reply