AM335x SD card connection detect pin

SANGILI KUMAR

Genius 3920 points

Hello

We are designing AM335x Android custom device based on AM335xevm_SK kit.

We need to use UART3_rxd_mux1 on C15 ball. But AM335X_SPI0_CS1 (Connection detect pin ) connected with C15 ball.

In board file (board-am335xevm.c) SDcard connection detect pin configured as GPIO (gpio.0_6).

Can we connect SD connection detect pin to any GPIO or its need to connect with only C15?

Thanks

KUmar.

over 12 years ago

0 Miroslav Kiradzhiyski XID over 12 years ago

TI__Mastermind 25235 points

Hi,

You may use any other available GPIO for the card detect signal. Just make sure that it isn't used by any other configuration.

Best regards,
Miroslav

0 SANGILI KUMAR over 12 years ago in reply to Miroslav Kiradzhiyski XID

Genius 3920 points

Thanks for your reply Mr.Miroslav

1. So you mean connection detect pin is just GPIO its not come under mmc protocol?

2. We can configure it any available GPIO ?

Thanks

Kumar

0 Miroslav Kiradzhiyski XID over 12 years ago in reply to SANGILI KUMAR

TI__Mastermind 25235 points

Yes. Please read this topic: http://e2e.ti.com/support/arm/sitara_arm/f/791/p/196388/703901.aspx#703901

Gururaja Hebbar said:
Linux uses aggressive Power management method to save Power. When MMC is not in use, clock is switched off to MMC module. Because of this, if CD & WP from MMC Controller is used, Card insertion/removal or Write-protect detection will not work properly. Hence GPIO for MMC CD & WP is used.

Best regards,
Miroslav

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AM335x SD card connection detect pin