Internal Pull- ups in SPI protocol, LPC1317-64P

[lpcware]

Content originally posted in LPCWare by aamir ali on Mon Mar 04 00:07:47 MST 2013
1 .Since in MISO0 line is input pin, so is there need of using internal pull up of LPC1317, so avoid floating condition.

2. Or we can put pull up at both MISO & MOSI lines without problem.
If yes,MOSI is output pin so on having internal pull up enabled is right, or it will affect the circuit.

3. Or I should not use pull up with any of line.


I have interface SD card with SPI protocol

[lpcware]

Content originally posted in LPCWare by leon_heller on Mon Mar 04 04:47:50 MST 2013
Pull-ups aren't required for SPI.