Need Help connecting MAX232

Wissam Ch.

Hello All ,
I found the attached schematic on this forum , and would like to know where the PINs labled· CTS , RTS should be connected .
from both sides· DB9 to MAX232 , and MAX232 to SX28 .
Thanks

PJAllen

If your application doesn't require "hand-shaking" then forget 'em.

Sens-a-Dat

Pin 7 of MAX232 connects to Pin 8 of DB9
Pin 13 of MAX232 connects to Pin 7 of DB9

Pin 10 of MAX232 connects to any of the unconnected pins shown for the SX28. The
pin you chose to use on the SX28 will be an OUTPUT. The purpose of this is to tell
the device connected to the DB9 that it is okay to send data to the SX28 device.

Pin 12 of MAX232 connects to any of the unconnected pins shown for the SX28. The
pin you chose to use on the SX28 will be an INPUT. The purpose of this is to tell
the SX28 device that the device connected to the DB9 is asking to send data to it.

Note:
RTS = Request To Send
CTS = Clear To Send

Example:
RTS pin of a PC (DB9) connects to the CTS pin of a modem (your SX28).
RTS pin of modem (your SX28) connects to the RTS pin of a PC (DB9).

www.lammertbies.nl/comm/info/RS-232_null_modem.html#full

Post Edited (Sens-a-Dat) : 3/25/2008 6:29:13 PM GMT

Wissam Ch.

Thanks Guys for the explanations.