JB_PTE
2008-05-22 17:40:14 UTC
I'm looking to use the SPI interface of the NI-8451 to facilitate an automated characterization setup in my lab. The slave SPI device that I will be using works on 5V logic. The users manual specifies using a minimum pull-up resistor of 1k for the static DIO lines to convert the 3.3V to 5V logic. Can I use this same technique with the four SPI lines? Also, figure 5 shows a resistive load to ground. Is it necessary to have a pull down resistor to ground in addition to the pull up?