Altera I/O Buffer (ALTIOBUF) IP Core User Manual
Page 27
Name
Required
Type
Description
USE_ DIFFERENTIAL_MODE
No
String Specifies whether the bidirectional buffer
is differential. Values are
TRUE
and
FALSE
.
When set to
TRUE
, the output is the
difference between the
dataio
and
dataio_b
ports. If omitted, the default is
FALSE
.
Currently,
ENABLE_BUS_HOLD
and
USE_
DIFFERENTIAL_MODE
cannot be used
simultaneously.
OPEN_DRAIN_OUTPUT
No
String Open drain mode. Values are
TRUE
and
FALSE
. If omitted, the default is
FALSE
.
OPEN_DRAIN_OUTPUT
and
USE_DIFFEREN-
TIAL_MODE
cannot be used simultaneously.
USE_TERMINATION_CONTROL
No
String Specifies series termination control and
parallel termination control. Values are
TRUE
and
FALSE
. If omitted, the default is
FALSE
. When this parameter is used for
Arria II GX devices and Cyclone series,
only series termination control is available.
Stratix series supports both.
USE_DYNAMIC_TERMINATION_
CONTROL
No
String Specifies dynamic termination control.
Values are
TRUE
and
FALSE
. If omitted, the
default is
FALSE
. An error is issued if
parallel termination (
Rt
) is on and
dynamic termination control is not
connected on a bidir pin. An error is
issued if
Rt
is off and dynamic termination
control is connected on an input or
bidirectional pin.
USE_IN_DYNAMIC_DELAY_CHAIN
No
String Specifies whether the input buffer incorpo‐
rates the user-driven dynamic delay chain
in the IP core, specifically,
IO_CONFIG
and
an input delay cell. Additional input ports
are
io_config_clk
,
io_config_clkena
,
io_config_update
, and
io_config_
datain
. Values are
TRUE
and
FALSE
. If
omitted, the default is
FALSE.
UG-01024
2014.12.15
ALTIOBUF Signals and Parameters: As Bidirectional Buffer
27
I/O Buffer (ALTIOBUF) IP Core User Guide
Altera Corporation