Card Setup - SeaLevel COMM+8.LPCI User Manual

Card Setup

Address and IRQ Selection
The 7803c is automatically assigned memory addresses and IRQs by your motherboard BIOS or by a "Plug-
n-Play" Operating System. Adding or removing other hardware or moving the adapter to another slot may
change the assignment of memory addresses and IRQs.
Clock Modes and Baud Rates
The 7803c derives a 125MHz clock for the Baud Rate Generator (BRG) from a 100MHz onboard, dual-
channel clock buffer. The internal BRG offers a wide range of possible baud rates configurable by software.
The best choice of clock divisor for a given baud rate is made automatically by the driver, with no need to
manually set clock divisor jumpers. The bit rate difference is within the +/– 2% recommended tolerance for
proper serial communication.
On-board LED indicator
Power LED (D1) is lit when the 7803c card and the UART [U6] are powered.
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© Sealevel Systems, Inc. 7803c Manual | SL9250 12/2023