NXP Semiconductors i.MX 8M Plus LPDDR4 EVK, Руководство пользователя по оборудованию, Страница: 10 / 20

Table 3. Power rails (continued)
SEQ Power rail Regulator Value/V
3 VDD_SOC PCA9450C BUCK1/3 0.85/0.95
1
4 VDD_ARM PCA9450C BUCK2 0.85/0.95/1.0
2
5 VDDA_1V8 PCA9450C LDO3 1.8
6 VDD_1V8 PCA9450C BUCK5 1.8
7 NVCC_DRAM_1V1 PCA9450C BUCK6 1.1
8 VDD_3V3 PCA9450C BUCK4 3.3
8 VSD_3V3 PCA9450C MUXSW 3.3
9 NVCC_SD2 PCA9450C LDO5 3.3/1.8
10 VEXT_3V3 Discrete 3.3
10 VDD_5V Load Switch 5.0
11 POR_B PCA9450C —
12 PER_12V Discrete 12
1. PCA9450C BUCK1/3 dual phase default output voltage is 0.85 V. Software will change it to 0.95 V for overdrive mode.
2. PCA9450C BUCK2 default output voltage is 0.85 V. Software will change it to 0.95 V for overdrive mode, 1.0 V for super
overdrive mode.
2.4 LPDDR4 DRAM memory (U2)
The i.MX 8M Plus LPDDR4 EVK board has one 1536 Meg × 32 (2 channels × 16 I/O) LPDDR4 SDRAM chip
(MT53E1536M32D4DT-046 WT:A) for a total of 6 GB RAM memory.
In the physical layout, the LPDDR4 chip is placed on the TOP side, the data traces are not necessarily connected to the LPDDR4
chips in sequential order, but for ease of routing, are connected as best determined by the layout and other critical traces.
The
DRAM_VREF
can be generated by i.MX 8M Plus internally, so it does not need to use external power supply and decoupling
capacitors. The calibration resistors used by the LPDDR4 chips and processor are 240 Ω 1% resistors.
2.5 eMMC memory (U3)
The eMMC memory is connected to the uSDHC3 interface of i.MX 8M Plus, which can support eMMC 5.1 devices. The EVK
has mixed eMMC parts from different vendors, for example SDINBDG4-32G-I1(2D MLC) or SDINBDA6-32G-I(3D TLC). It is the
default boot device of the EVK. The boot settings are as shown in
Table 2 .
2.6 QSPI Nor Flash (U4)
The QSPI memory is connected to the FlexSPI interface of i.MX 8M Plus, which can support up to 166 Mhz DDR mode device. The
QSPI memory is on the 8MPLUSLPD4-CPU board, and the part number is MT25QU256ABA1EW7-0SIT. It can support 166Mhz
SDR and 90Mhz DDR operation. To select it as the boot device of the EVK, refer to the boot settings as shown in
Table 2 .
NXP Semiconductors
Specifications
i.MX 8M Plus LPDDR4 EVK Board Hardware User's Guide, Rev. 0, March 9, 2021
User's Guide 10 / 20