How can i use NI8451 for 3 wire SPI mode? By connecting the MISO and MOSI together?

[tomcat_k2]

Can anyone suggest how can i do a 3 wire SPI with the NI8451 (USB - SPI/I2C module)?

[lhaoxian]

Hi tomcat_k2,

When you mean 3-wire SPI, do you mean the 3 wires are SCLK, SS and SISO (Slave-in-slave-out)? If I misunderstood please let me know.

From the article I found, the USB-845x supports 4-wire mode only,  and the 3-wire (SISO) is not supported.

FAQ for USB-8451 SPI

http://zone.ni.com/devzone/cda/tut/p/id/7448

If you have any further questions, you may post them in the Digital I/O forum here.

Best regards,

Victor