M
Michael J. Noone
Hi - I'm trying to interface a 3.3V ARM (Atmel AT91SAM7X256) to a 2.8V
accelerometer (Kionix KXP-74) over SPI. The ARM is the master. So -
tell me how much I'm off here: I was thinking I could use a simple
2-resistor voltage divider for the clock, master out slave in, and
slave select pins. For the master in slave out I don't think I need to
do anything, as I believe a 2.8V signal will register as high. (though
I haven't verified that yet).
Is this the best way to interface these parts? Any way to make it
smaller? (6 resistors is kinda chunky - maybe two 3-resistor resistor
arrays, if those exist) What sorts of values would I use for the
resistors? Thanks,
-M. Noone
accelerometer (Kionix KXP-74) over SPI. The ARM is the master. So -
tell me how much I'm off here: I was thinking I could use a simple
2-resistor voltage divider for the clock, master out slave in, and
slave select pins. For the master in slave out I don't think I need to
do anything, as I believe a 2.8V signal will register as high. (though
I haven't verified that yet).
Is this the best way to interface these parts? Any way to make it
smaller? (6 resistors is kinda chunky - maybe two 3-resistor resistor
arrays, if those exist) What sorts of values would I use for the
resistors? Thanks,
-M. Noone