TRM (SPRUH73M) describes: "Clock Frequency: identification mode: 400 KHz; data transfer mode up to 10 MHz."
The internal clock source frequency for MMC clock is 96MHz. It can be divided by the CLKD value of SD_SYSCTL Register for MMC clock.
Our customer checks the MMC clock frequency in ROM Code booting from SD card with TMDSICE3359. Then the clock frequencies are 100 - 120 KHz in identification mode and 6 MHz in data transfer mode.
What is the CLKD value in booting from SD card? Does the value change dynamically in booting?
Does the clock frequency in booting depend on the specifications (e.g. speed class) of the SD card used?
Best regards,
Daisuke
