Kontron PCI-COM-8ULP, User Manual

Page: 28 / 38

page 28 PCI-COM-8ULP User’s Guide
Baud Rate Divisor Values
On the card, the UART clock frequency is 1.8432 MHz. Below is a table of popular
divisor frequencies.
Baud Rate Divisor x1 Divisor x8 Max Diff. Cable Length*
921600 - 1 250 ft
460800 - 2 550 ft
230400 - 4 1400 ft
153600 - 6 2500 ft
115200 1 8 3000 ft
57600 2 16 4000 ft
38400 3 24 4000 ft
28800 4 32 4000 ft
19200 6 48 4000 ft
14400 8 64 4000 ft
9600 12 96 – Most Common 4000 ft
4800 24 192 4000 ft
2400 48 384 4000 ft
1200 96 768 4000 ft
*These are theoretical maximums based on typical conditions and good quality cables, based on the EIA
485 and EIA 422 standard for balanced differential drivers.