Pleora Technologies iPort NTx-Pro, Hardware Manual, Page: 41 / 52

37
Copyright © 2010 Pleora Technologies Inc.
Serial Port: Standard-Bandwidth: UART
The NTx-Pro IP Engine supports Universal asynchronous receiver/transmitter (UART) serial communi-
cation. The UART signal and timing requirements are explained in the sections that follow.
Signals
The standard serial port communication uses the following signals:
• UART x _TXD
• UART x _RXD
• DGND (return)
Timing for UART
The NTx-Pro IP Engine supports these UART protocols:
• 8-bit data transfer
• 1 start bit
• Any parity (even, odd, or none)
• 1 or 2 stop bits
UARTx_TXD
UARTx_RXD
D0 D1 D2 D3 D4 D5 D6 D7 START Parity STOP
t
UART
Standard-Bandwidth Serial UART Baud Rates and Data Periods
Baud Rate, BR
(bps)
Data Period, t
UART
(us)
8170 122.4
9600 113.2
14400 69.4
19200 52.1
28800 34.7
38400 26.0
57600 17.4
115200 8.7
a. Baud rate is based on the inverse of the data period, or t
UART
=1/BR