User guide

WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 41
Fastrack Xtend User Guide
Interfaces
5.1.2.1.1. RS232 Implementation
The following subsections describe how the RS232 serial link can be implemented to suit different
designs.
5.1.2.1.1.1. 5-wire Serial Interface RS232 Implementation
The signals used in this interface are as follows:
 CT103/TXD
 CT104/RXD
 CT105/RTS
 CT106/CTS
 CT108-2/DTR
Note: The CT108-2/DTR signal must be managed following the V24 protocol signaling if the Sleep Idle
Mode and Serial Port Auto Shut Down feature are to be used.
Figure 17. V24 Serial Link Implementation for a 5-wire UART
5.1.2.1.1.2. 4-wire Serial Interface RS232 Implementation
The signals used in this interface are as follows:
 CT103/TXD
 CT104/RXD
 CT105/RTS
 CT106/CTS