Other Parts Discussed in Thread: CC3120MOD, CC3120
Greetings,
We are going to use CC3220MOD with a SPI slave interface, but it would be a plus if we can also use CC3120MOD in a pin compatible way.
Therefore, we would like to use the same pins for SPI on CC3220MOD that are used for the "host SPI" interface on CC3120MOD. There is a peculiarity in the data sheets though:
On CC3120/CC3120MOD, pin 6 is called "HOST_SPI_DIN", which is an input and therefore the MOSI function since CC3120 is a SPI slave.
On CC3120/CC3120MOD, pin 7 is called "HOST_SPI_DOUT", which is an output and therefore the MISO function since CC3120 is a SPI slave.
On CC3220/CC3220MOD, pin 6 can be configured as "GSPI_MISO", which would be an output in SPI slave mode.
On CC3220/CC3220MOD, pin 7 can be configured as "GSPI_MOSI", which would be an input in SPI slave mode.
Maybe the CC3120 is using another SPI interface internally (not GSPI) for the "host SPI" interface?
Is there any way to configure the GSPI on CC3220 in SPI slave mode to be pin compatible with the CC3120 "host SPI" interface?
Best regards,
Per Torstein Roine
