altstratixii_oct Megafunction
Parameterized on-chip termination (OCT) Definition
megafunction. The altstratixii_oct
megafunction allows you to use the OCT block in user mode. In
non-user mode, when you set pins to have calibrated termination,
the OCT block configures once during initialization and then powers
off. In user mode, the OCT block stays powered on and you can send
an enable signal to tell the OCT block to recalibrate during
runtime. User mode allows the termination control to adapt to
changing conditions, such as variances in temperature or
voltage.
User mode requires a clock signal and an enable signal from the
design. Non-user mode requires no extra signals from the design. If
you use the OCT block in user mode, you should use the altstratixii_oct
megafunction. If you are not recalibrating the OCT block during
runtime, you should use the OCT in non-user mode.
a
ltstratixii_oct megafunction cannot be instantiated with the
IP Catalog.