RS-232 Connection to PC
The PC is configured as a DTE device. A one-to-one, female DB-9S to DB-9S cable can be used to
connect the PC communication port to the CFSound-IV SERIAL connector when the CFSound is configured
as DCE. Only four wired connections are required.
The RTS connection is for optional flow control of the transmit data to the CFSound to prevent over-
flowing the input buffer at higher baud rates. It requires disabling the RS-485 enable in the CFSound
configuration and implementation of flow control on the host device supplying the data to the CFSound.
RS-232 CFSound (JB1 jumpered as DCE) to PC (DTE)
The CFSound-IV can be connected with a one-to-one cable between the CFSound and host PC when JB1
is configured for DCE (default configuration in copper traces on bottom of the board beneath JB1):
G
N
D
+1
0
-
+
1
8
V
D
C
Power
Supply
Female
(To CFSound) From Back!
1
5
6
9
2 - TxD
3 - RxD
8 - RTS (optional)
5 - GROUND
9 - POWER
3 - TxD
2 - RxD
5 - GROUND
8 - CTS (optional)
JB
1
Female
(To PC) From Back!
1
5
6
9
D
C
E
