Freescale Semiconductor i.MX 6UltraLite, Руководство пользователя по оборудованию

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i.MX 6UltraLite EVK Board Hardware User’s Guide, Rev. 1, 03/2016
Freescale Semiconductor, Inc. 11
Specifications
2.4 DDR3L DRAM memory
The i.MX 6UltraLite EVK board has one 256 Meg x 16 DDR3L SDRAM (MT41K256M16HA-125:E) for
a total of 512 MB RAM memory.
The DDR_VREF is created by a simple voltage divider using 1.5K Ohm 1% resistors and 0.1uF capacitors
for stability. The relatively small value resistors provide enough current to maintain a steady midpoint
voltage. The calibration resistors used by the DDR3L chips and the processor are 240 Ohm 1% resistors.
These resistor values are specified by the DDR3L specifications.
2.5 SD card slots (J301, P1701)
There are two SD card connectors (J301, P1701) on the i.MX 6UltraLite EVK board.
• J301 on the i.MX 6UltraLite EVK Main board is the Micro SD slot for USDHC2 interface.
• P1701 on the i.MX 6UltraLite EVK base board is a standard SD slot for USDHC1. It can also
support accessories such as a WiFi card, etc.
2.6 eMMC
The eMMC interface is connected to USDHC2 of i.MX 6UltraLite. It can support up to eMMC 4.5, but
the eMMC device is not populated by default on the EVK board. To boot from eMMC, remove the Micro
SD socket and populate the eMMC device, and then change the boot device switch (SW601) settings (OFF,
ON, ON, OFF) as shown in
Table 3 .
Additionally, the developer should adjust the BOOT_CFG settings for specified eMMC device by
exchanging the pull up/down resistors. See the main board schematic for more information.
2.7 QSPI Nor flash
On the 6UltraLite EVK board, there is one 256 Mbit QSPI Nor Flash device. If the developer wants to boot
from the QSPI flash, he must change the boot device switch (SW601) settings to OFF, OFF, OFF, OFF, as
shown in
Table 3 .
LDO
RT9169 3.3 V / 100 mA
VDD_SNVS_IN
VDD_SNVS_IN
LDO
RT9193 3.3 V / 300 mA VLDO_3V3 ADC module
LDO
UM1750
1.8 V or 3.3 V / 300 mA NVCC_SD SD module
LDO
UM1750
2.8 V / 300 mA NVCC_CSI CSI module
LDO
UM1750 1.5 V / 300 mA DVDD_1V5 Camera module
LDO
RT9169 1.2 V / 100 mA VLDO_1V2 HDMI module
Table 4. Power rails (continued)