lpcware

LPC1778 - INPUT INVERSION ON SSP0_SSEL P1[21]

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by wwwenrico on Thu Sep 17 03:58:20 MST 2015
Hi,

I'm designing a board based on the LPC1778 microcontroller.

I have to interface the LPC1778 to an external module that acts as an SSP master.

I'll configure the SSP0 interface as a slave.


The SSEL signal of the master is inverted with respect to the standard.
In fact, the idle state is 0 Volt and not 3.3 Volt.


QUESTION:
Can I use the IOCON_P1_21 register to invert the input signal and have the SSEL inverted?


Best Regards,
Enrico Migliore

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