Table of Contents
Advertisement
Figure 13. Example of V24/CMOS Serial Link Implementation for a 5-wire UART
The designs shown in Figure 11, Figure 12 and Figure 13 are basic designs. Both the DCD and the RI
can be left open when not used.
However, a more flexible design to access this serial link with all modem signals is shown below.
Figure 14. Example of a Full Modem V24/CMOS Serial Link Implementation for a full UART
An internal 10KΩ pull‐up resistor is connected on both RI and DCD to set the signals to HIGH level
during the Reset state.
The UART interface is a 2.8V type, but it is 3V tolerant.
Note:
The WISMO228 UART is designed to operate using all the serial interface signals. In particular, it is
recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data
corruption during transmission.
WA_DEV_W228_PTS_002
Rev 001
Product Technical Specification &
Customer Design Guidelines
Page 47 of 108
Advertisement
Table of Contents
