Each channel is programmable to be terminated or not. The lower four bits are independent. Standard termination value is 180 ohms including switch. A high density 68 pin SCSI III front panel connector and backplane IO provide system wiring options. The IO channels can be used as interrupt generators.
Interrupts are programmable to be based on level or edge and active high or low.
The registers are mapped as 32 bit words and support byte, word and 32 bit access. All registers are read-writeable. An 8 bit user switch is provided to allow custom configurations to be easily and automatically configured with a common software driver. All of the data bits pass through the FPGA used to implement the PCI interface. Any or all bits can be used for custom state machine and IO functions.