About SD2_CD_B and SD2_WP signal on i.MX6DL_SABRE-SDP

[yuuki]

Would you teach about SD2_CD_B and SD2_WP signal on i.MX6DL_SABRE-SDP?

According to a reference manual,(IMX6SDLRM.pdf)
The SD2_CD_B of i.MX6DL is assigned to GPIO_4(ALT6)(pin R6).
And, the SD2_WP is assigned to GPIO_2(ALT6)(pin T1).

However, In i.MX6DL_SABRE-SDP, the NANDF_D2(pin F16) is used as SD2_CD_B signal.
And, the NANDF_D3(pin D17) is used as SD2_WP signal.
(I understand that these signals are controlled by GPIO.)

Would you teach the reason for not using pins in which these signals were assigned?

Best Regards,

[jimmychan · Accepted solution]

Both pins are set as a GPIO pin. So, it's also work if the GPIO_4 used as SD2_CD_B and GPIO_2 used as SD2_WP.

I think the arrangement of the PCB layout could be the reason for this different GPIO pins assignment.