Hey Guys, I am attempting to interface a LTC6803-3 battery managment IC with an Arduino pro mini.
I have never used SPI and after looking into it some I am a bit confused.
Here is the datasheet
On the LTC6803 its listed
MAIN SPI PORT
TO HOST µP OR
*REQUIRES 1k PULL-UP RESISTOR AT HOST DEVICE
(SIGNAL NOT USED FOR INTER-IC COMMUNCATION)
On the Arduino pro mini its
SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK). These pins support SPI communication, which, although provided by the underlying hardware, is not currently included in the Arduino language.
So I think it goes like this
LTC6803 <> Arduino
And it asks for a pullup ressitor on SDO, so that means one end of the 1K resistor is connected to the trace between SDO<>MOSI and the other end is connected to VCC, correct?
One other question that is not really Arduino specific… on page 13 of the datasheet it shows the LTC6803 daisy chained with a couple other ones. I do plan on being able to use a second one if needed, In the schematic it just lists a “digital Isolator” I have never used one of those… wouldnt have any idea what to look for
It also lists that as 3V and the MPU as 3V, should I use a 3V arduino pro mini to make it easier?