Purpose: Indicates the power-up state of the pin. All I/Os are equipped with pull-up and pull-down resistors, which are enabled during power-up. These resistors are disabled just before VCCA reaches 2.5V, and then the I/Os behave according to the design. For eX and SX-A, this configurable I/O state does not eliminate the risk of an I/O driving a temporary unknown state near the end of the power-up sequence when VCCI is powered up before VCCA. For RTSX-S, the outputs will drive according to the design, when the resistors become disabled regardless of the power-up sequence.
|
Families |
Supported |
|
Fusion |
No |
|
ProASIC3E |
No |
|
ProASIC3 |
No |
|
ProASIC PLUS |
No |
|
Axcelerator |
No |
|
ProASIC |
No |
|
SX-A |
Yes |
|
SX |
No |
|
RTSX-S |
Yes |
|
eX |
Yes |
|
MX |
No |
Values: Use this attribute to set the power-up state. Your choices are None, High, and Low.
Default value: The default value is None. The only exception to this is an I/O that exists in the netlist as a port, is not connected to the core, and is configured as an Output Buffer. In that case, the default setting will be Low.