**Details** This is a standard "simple" RS232 port. This Tibbit is based on a generic RS232 transceiver (we use Zywyn ZT232F). For "normal" RS232 applications, this Tibbit has to be connected to the TX and RX lines of the CPU's UART (see [[SER]](http://docs.tibbo.com/phm/ser_tibbits_that_require_uart_.htm)). Planning to use RTS/CTS flow control as well? An interrupt line must be available, too (see [[INT]](http://docs.tibbo.com/phm/int_tibbits_that_require_an_in.htm)). Combining this Tibbit with the "C" device #19 (DB9M connector) will create a serial port with standard pin assignment on the DB9M:
#1 | No connection |
#2 | RX (input) |
#3 | TX (output) |
#4 | No connection |
#5 | Ground |
#6 | No connection |
#7 | RTS (output) |
#8 | CTS (input) |
#9 | No connection |