Use the pinout to connect to terminals on the PXIe-5644.

Figure 1. PXIe-5644 Digital I/O VHDCI Connector Pinout


Table 1. PXIe-5644 Digital I/O VHDCI Connector Signal Descriptions
Signal Direction Port Width (Bits) Description
DIO <23..20> Bidirectional, per port 4 Data port. Single data rate (SDR) is default. Double data rate (DDR) can be achieved using user-supplied component-level IP (CLIP) or IP integration node.
DIO <19..16>
DIO <15..12>
DIO <11..8>
DIO <7..4>
DIO <3..0>
PFI 1 Bidirectional 1 Can be used as data, handshaking signals, or I2C.
PFI 2
Clock In Input 1 Synchronous clock in to the PXIe-5644.
Clock Out Output Synchronous clock out from the PXIe-5644. You can also tristate this line.