National Instruments NI 9401 - Manual (Page 8)

NI 9401 Operating Instructions and Specifications 8 ni.com
Figure 2 illustrates how to connect an SPI device to the NI 9401.
In this example, the three channels assigned to output signals are
on one port and the channel assigned to an input signal is on the
other port.
Figure 2. Connecting an SPI Device to the NI 9401
NI 9401
DIO3:0
Configured
for Output
DIO7:4
Configured
for Input
SCLK
MOSI
MISO
SS
SPI Device