I/O Clocking Modes - I/O Clocking Modes

I/O Clocking Modes - I/O Clocking Modes - AM026

Versal AI Edge Series Gen 2 and Prime Series Gen 2 Technical Reference Manual (AM026)

Document ID

AM026

Release Date

2025-12-23

Revision

1.3 English

The controller's I/O clocking modes are listed in the following table.

Table 1. SD_eMMC Clocking Modes
Controller Mode	Clock Rate (MHz)	Data Rate	Clock Source	Tuning Method
SD
Default speed	25	Single	DIV_CLK	~
SDR-12	25	Single	DIV_CLK	~
High speed	50	Single	DLL Clocks	Manual
SDR-25	50	Single	DLL Clocks	Manual
DDR-50	50	Double	DLL Clocks	Manual
SDR-50	100	Single	DLL Clocks	Auto-tuning
SDR-104	200	Single	DLL Clocks	Auto-tuning
eMMC
Legacy MMC	25	Single	DIV_CLK	~
HS-SDR	50	Single	DLL Clocks	Manual
HS-DDR	50	Double	DLL Clocks	Manual
HS-200	200	Single	DLL Clocks	Auto-tuning