User`s manual

CYDAS UDR Library User’s Guide Other Hardware - Demo Board
126
Digital I/O
The DEMO BOARD simulates the following:
 One eight-bit
AUXPORT non-configurable digital input port. Each bit of the AUXPORT generates a square
wave with a different period.
 One eight-bit
AUXPORT non-configurable digital output port.
 Two eight-bit configurable digital I/O ports—
FIRSTPORTA, FIRSTPORTB—which can be used for high
speed scanning.
FIRSTPORTA functions like AUXPORT in that it generates square waves. Each bit of
FIRSTPORTB generates a pulse with a different frequency.