Question about SPI_1 module can not output signal at PIN PA[6](clock) and PA[7](MOSI) in S32R274

[nxf49919]

Hi

The S32R274 has two SPI devices: SPI_1 and SPI_2, and there is no difference in the RM description.

I found that using the same SPI and pin(SIUL2) register configuration, other pins can output clock and data signals, but PA [6] and PA [7] cannot output signals, as shown in the following table:

PIN	Module	function	Register value	OUTPUT
PA[6]	SPI_1	SCK	0x12840001	Without output signal
PB[2]			0x12840004	Output clock signal
PA[7]		MOSI	0x12840001	Without output signal
PA[9]			0x12840004	Output data signal
PA[0]	SPI_2	SCK	0x12840002	Output clock signal
PA[11]			0x12840001	Output clock signal
PA[1]		MOSI	0x12840002	Output data signal
PA[12]			0x12840001	Output data signal

SPI_1 supports the following pins:

  CLK:   PA [6], PB [2]

  MOSI: PA [7], PA [9]

  MISO: PA [8], PB [3], PH [7]

SPI_2 supports the following pins:

  CLK:   PA [0], PA [11]

  MOSI: PA [1], PA [12]

  MISO: PA [2], PA [13]

Chip selections pins and data input pins are not listed.

When use any SPI_2 configuration or SPI_1 use PB[2] as clock and PA[9] as output, the signal is normal, but PA[7] and PA[6] cannot output signal under the same configuration.

I used the correct pin register MSCR and SPI register configuration according to the reference manual, and I saw the register write the correct value in debug mode in real time.

Thanks!

[lukaszadrapa · Accepted solution]

Hi,

I did quick test on EVB and it works as expected, I can see nice signals on my scope. My test code is attached (copied from other projects, maybe some comments are not valid).

If you use EVB, PA6 and PA7 are available on J13 on the adapter:

Regards,

Lukas

[lukaszadrapa]

[nxf49919]

Hi Lukas

Thank you very much, your test is right.

When I test again, I also observed the output signal in PA[6] and PA[7] by J13.

I already know the reason.

Only PA[8] PA[7] PA[6] in the MPC57XXXMB Evaluation Board Motherboard which I use to test did not connet to S32R274 corresponding pad.

So I only can observe the PA[6] PA[7] PA[8] output signal in Daughterboard J13.

We can output SPI_1 signal in PA7[channel1], PA9[channel2], PA6[channel3] signal as follow:

Best Regards

Huaqiang

[lukaszadrapa]

Hi Huaqiang,

it's mentioned in the user guide, section 5. Board interface connector:

https://www.nxp.com/docs/en/user-guide/S32R274-EVBUG.pdf 

Regards,

Lukas

[nxf49919]

Hi Lukas

Thank you， I undrstand.

section 5. Board interface Connector is very useful for test signal.
Best Regards

Huaqiang

[nxf49919]

Hi David

This is the value of MSCR[n] register in S32R274 SIUL2 module, details as follow:

PIN	Module	function	Register	value	OUTPUT
PA[6]	SPI_1	SCK	SUIL2.MSCR[6]	0x12840001	Without output signal
PB[2]			SUIL2.MSCR[18]	0x12840004	Output clock signal
PA[7]		MOSI	SUIL2.MSCR[7]	0x12840001	Without output signal
PA[9]			SUIL2.MSCR[9]	0x12840004	Output data signal
PA[0]	SPI_2	SCK	SUIL2.MSCR[0]	0x12840002	Output clock signal
PA[11]			SUIL2.MSCR[11]	0x12840001	Output clock signal
PA[1]		MOSI	SUIL2.MSCR[1]	0x12840002	Output data signal
PA[12]			SUIL2.MSCR[12]	0x12840001	Output data signal

Thank you

[davidtosenovjan]

Hi, which register the table above points to?