I use an ATMEGA328PB and 2 peripherals : MAX17841B and MCP2518FD.
So I use the SPI interface to control one or the other, but also to program the micro controller.
I connected the MISO MOSI and SCK pins directly to the ICSP connector in order to program it, and to avoid interference, I have 150 ohm resistors that go to both interfaces (MAX17841 and MCP2518FD)
The two interfaces (MAX17841 and MCP2518FD) have a resistance of 150 Ohm on their CS pin
My question is: how to properly manage the 2 interfaces? Should I add pull-up or pull-down resistors? PESD5V0U1UA, 115 connected to ground on the pins in order to protect?
Because on this circuit: https://datasheets.maximintegrated.com/en/ds/MAX17841EVMINIQU.pdf
it is an evaluation board of one of the modules, fear to see several protection on the lines, but on the MCP2518FD in the documentation there is nothing, no pull-up or nothing ...