Title: DFlex/Fast Serial I/O Baud Rate Selection
Keywords: Baud Rate Selection: DFlex/Fast
Date: February 3, 1997
KDB: KDB-167
Revision: 0.01
Author: Support
Distribution: External
Baud Rate Selection: DFlex/Fast
The DFlex-2/Fast and the DFlex-4/Fast are high speed two and four port serial adapters for ISA bus compatible computers. Through the use of large FIFO buffers in the 16650 and 16750 UARTs as well as high speed circuitry, DFlex/Fast adapters offer ideal solutions for applications requiring serial communications up to 460K baud.
The DFlex/Fast adapters are capable of data transmission rates from 200 – 460K baud. Since most commercial software is not aware of the higher baud rates (greater than 115k baud), when you set a baud rate in your software it will actually be FOUR TIMES faster on the DFlex/Fast adapter.
Example:
If you want to run the DFlex/Fast adapter at 230.4K baud, you would set your software to 57.6K baud. Please refer to Table below for a cross reference of standard baud rates to DFlex/Fast baud rates.
Note:
Some baud rates are not available with the DFlex/Fast adapters (i.e. 50 and 57.6K baud).
Table 5: Baud rates – DFlex/Fast
Standard Set in software
Baud Rate (4X standard)
50 200
75 300
150 600
300 1200
600 2400
1200 4800
2400 9600
4800 19.2k
7200 28.8k
9600 38.4k
19.2k 76.8k
38.4k 153.6k
57.6k 230.4k
115.2K 460.8K
End of KDB-167