The chip select input (CSI_B) enables the
SelectMAP bus. When CSI_B is High, the FPGA ignores the
SelectMAP interface, neither registering any inputs nor driving any outputs.
The D[31:00] pins are placed in a High-Z state, and
RDWR_B is ignored.
- If
CSI_B= 0, the device's SelectMAP interface is enabled. - If
CSI_B= 1, the device's SelectMAP interface is disabled.
If only one device is being configured through the
SelectMAP interface and readback is not required, the CSI_B
signal can be tied to ground.