Primitive: I/O Weak Keeper
- PRIMITIVE_GROUP: I/O
- PRIMITIVE_SUBGROUP: WEAK_DRIVER
- Families: UltraScale, UltraScale+
Introduction
The design element is a weak keeper element that retains the value of the I/O when not being driven. For example, if a logic 1 is being driven onto the I/O, KEEPER drives a weak/resistive 1 onto the pin/port. If the net driver is then 3-stated, KEEPER continues to drive a weak/resistive 1 onto the pin/port.
Port Descriptions
| Port | Direction | Width | Function |
|---|---|---|---|
| O | Inout | 1 | Keeper output. Connect directly to a top_level port. |
Design Entry Method
| Instantiation | Yes |
| Inference | Yes, via property |
| IP and IP Integrator Catalog | No |