RS-232: Difference between revisions

Latest revision as of 20:13, 7 October 2017

Voltage	RS-232	TTL
0	[+3V;+25V]	0V
1	[-3V ;-25V]	Vcc (usually 3.3V or 5V)

DCE stands for Device Communications Equipment.

DTE stands for Device Terminal Equipment.

On the NXP i.MX6 the convention is a little different:

Bluetooth module, modems and GPS are generally DTE while computer are DCE.


Pin-out	http://www.db9-pinout.com/db9-pinout/db9-pinout.gif

@@ Line 1: / Line 1: @@
-pinout, DCE/DTE
+=== What are the RS-232 and Transistor-Transistor-Logic (TTL) voltage level? ===
+{| class="wikitable"
+!Voltage
+!RS-232
+!TTL
+|-
+|0
+|[+3V;+25V]
+|0V
+|-
+|1
+|[-3V ;-25V]
+|Vcc (usually 3.3V or 5V)
+|}
+=== What is DCE and DTE? ===
+DCE stands for Device Communications Equipment.
+DTE stands for Device Terminal Equipment.
+{| class="wikitable"
+!Signal
+!DCE
+!DTE
+|-
+|RX
+|out
+|in
+|-
+|TX
+|in
+|out
+|-
+|CTS
+|out
+|in
+|-
+|RTS
+|in
+|out
+|}
+On the NXP i.MX6 the convention is a little different:
+{| class="wikitable"
+!Signal
+!i.MX6 DCE
+!i.MX6 DTE
+|-
+|RX
+|in
+|out
+|-
+|TX
+|out
+|in
+|-
+|CTS
+|out
+|in
+|-
+|RTS
+|in
+|out
+|}
+Bluetooth module, modems and GPS are generally DTE while computer are DCE.
+== Resources ==
+{| class="wikitable"
+!
+!
+|-
+|Pin-out
+|http://www.db9-pinout.com/db9-pinout/db9-pinout.gif
+|}
+== References ==