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CCS/AM5718: Boot questions

Muthu S
Intellectual 720 points

Part Number: AM5718

Tool/software: Code Composer Studio

Hi,

One of our customer using AM5718 MPU for WiFi streaming video application. 

They have some query below...

1. Processor AM5718 is having MMC1 to MMC4 for connecting all type memory peripherals like SD CARD or eMMC Flash or SDIO CARD. In Our schematics we have connected MMC4 signals for SD Card connection and QSPI1 signals for NOR Flash(512 mb). For processor booting we have done SYSBOOT registers settings for NOR Flash and we tried booting but not able to boot processor. Can you help us to get procedure  how we can boot from NOR Flash.

 2. In AM5718 EVM, SD Card signals are connected to MMC1 for processor booting from sd card. We have connected to MMC4 because in PINMUX file of AM5718, if we configure MMC1 as SD Card it is showing voltage constraint issue. So we have connected to MMC4 and we have done required changes of SYSBOOT setting for SD Card booting but we found that Processor not booting again. So is it possible to boot SD card by connecting it to MMC4 or compulsory we need to use MMC1 for SD Card connection. 

 3. In MMC1 signals for SD CARD connection there is one pin called MMC1_SDCD is this pin is compulsory required for SD card detection for Processor to boot. 

Please help to resolve...

Regards,

Muthu S

  • 0
    TI__Guru**** 393215 points

    Hi,

    1. QSPI boot is different from NOR boot. Check that you have SYSBOOT configured for QSPI, and not for XIP. Not that ROM code does not perform any specific action to detect, reset or power up the QSPI device. QSPI is assumed to be properly powered and reset to be completed before every attempt to boot by ROM code.
    2. No, SD boot is possible only from MMC1.
    3. The Card Detect signal is not mandatory for booting, but it's best practice to have it connected.