SeaLevel ULTRA COMM+422.PCI User Manual page 12

Clock Modes
The ULTRA COMM+422.PCI employs a unique clocking option that allows the end user to select from divide
by 4, divide by 2 and divide by 1 clocking modes. These modes are selected at Headers J1C through J4C.
To select the Baud rates commonly associated with COM: ports (i.e., 2400, 4800, 9600, 19.2, ... 115.2K Bps)
place the jumper in the divide by 4 mode (silk-screen DIV4).
To double these rates up to a maximum rate for 230.4K bps place the jumper in the divide by 2 (silk-screen
DIV2) position.
© Sealevel Systems, Inc. 7402 Manual | SL9063 7/2021
Figure 7 - Clocking Mode 'Divide By 4'
Figure 8 - Clocking Mode 'Divide By 2'
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