2.17 eMMC Flash
The eMMC flash can be used to boot the PS, and to store the FPGA bitstream, ARM application code and
other user data.
2.17.1 eMMC Flash Type
Table 28 describes the memory availability and configuration on the Mercury+ XU1 SoC module.
Module Flash Type Size Manufacturer
ME-XU1 - R1 H26M41204HPR 8 GB SK Hynix
ME-XU1 - R2 and newer H26M52208FPRI 16 GB SK Hynix
ME-XU1 - R2 and newer EMMC16G-W525-X01U 16 GB Kingston
Table 28: eMMC Flash Type
Warning!
Other flash memory devices may be equipped in future revisions of the Mercury+ XU1 SoC module.
Please check the user manual regularly for updates.
2.17.2 Signal Description
The eMMC flash signals are connected to the MIO pins 13-22 for 8-bit data transfer mode; some of these
signals are shared with the PJTAG interface (Refer to Section 3.6.3 for details). The command signal has a
4.7 kΩ pull-up resistor to 1.8 V and the data lines have 47 kΩ pull-up resistors to 1.8 V.
2.18 SD Card
An SD card can be connected to the PS MIO pins 45-51. The corresponding MIO pins are available on the
module connector. Information on SD card boot mode is available in Section 3.9.
Please note that external pull-ups are needed for SD card operation. Depending on the selected voltage for
VCC_CFG_MIO, a level shifter to 3.3 V may be required (some level shifters also have built-in pull-ups).
For booting from an Ultra High Speed (UHS) SD card, an SD 3.0 compliant level shifter is required on the
base board and VCC_CFG_MIO must be set to 1.8 V. Please note that this boot mode has not been tested,
but it may be supported in the future.
2.19 Dual Gigabit Ethernet
Two 10/100/1000 Mbit Ethernet PHYs are available on the Mercury+ XU1 SoC module, both connected to
the PS via RGMII interfaces.
2.19.1 Ethernet PHY Type
Table 29 describes the equipped Ethernet PHY devices type on the Mercury+ XU1 SoC module.
D-0000-428-001 41 / 66 Version 13, 15.08.2019
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