Table 9. Capacitor recommendations to be placed near i.MX8 QM
2
(continued)
Checkbox Supply 1 µF
2.2
µF
22 µF 100 µF Notes
VDD_HDMI_RX0_VH_RX_3P3
VDD_USB_OTG1_3P3
VDD_USB_OTG2_3P3
2 1 --- ---
These three balls should be filtered
through a 120 Ω ferrite bead. Place the
two 1 µF caps under the BGA package.
VDD_ENET_MDIO_1P8_2P5_3P3 1 --- --- ---
Ball N17 (if connected to the main 1.8V
or 3.3V, this ball would fall into the
digital power group below).
VDD_EMMC0_1P8_3P3
VDD_PCIE_DIG_1P8_3P3
VDD_LVDS_DIG_1P8_3P3
VDD_MIPI_DSI_DIG_1P8_3P3
VDD_QSPI0_1P8_3P3
VDD_QSPI1A_1P8_3P3
VDD_MLB_DIG_1P8_3P3 (Note 5)
VDD_M4_GPT_UART_1P8_3P3_n
VDD_SPI_SAI_1P8_3P3_n
VDD_ESAI0_MCLK_1P8_3P3_n
VDD_ESAI1_SPDIF_SPI_1P8_3P3
VDD_FLEXCAN_1P8_3P3
VDD_USDHC_VSELECT_1P8_3P3
Digital Power, see note
These power balls can be connected
to either 1.8 V or 3.3 V, depending on
the specific design. The exact number
of caps on each rail (1.8 V or 3.3 V) will
be dependent on the number of balls
connected to that rail, but there should
be a cap for every 1-2 balls and each
ball should have a capacitor relatively
close to it.
Note 1: All capacitors in MEK use the X7S or X7R grades.
Note 2: For PMIC capacitor recommendations, see the PMIC data sheet.
Note 3: Recommended capacitor placement used in the NXP i.MX8QM MEK Customer Board.
Note 4: MLB is not supported on this product. This MLB power rail may be tied to the power supply voltage indicated or
terminated per the Hardware Developer's Guide and power supplies of unused functions.
Note 5: MLB is not supported on this product. The MLB power rail must be tied to the power supply voltage indicated if other I/O
functions are used as determined by the IOMUX selection. Alternately, terminate the MLB supply per the Hardware Developer's
Guide and power supplies of unused functions.
See the i.MX8QXP LPDDR4 MEK layout for recommended capacitor placement.
Table 10. Capacitor recommendations to be placed near i.MX8 QXP
2
Checkbox Supply
0.22
µF
1 µF
2.2
µF
10
µF
22 µF Notes
VDD_DDR_VDDQ 8 2 9 --- 3
VDD_MAIN --- --- 12 6 4
Table continues on the next page...
NXP Semiconductors
i.MX8 QM and QXP design checklist
i.MX8 QM / i.MX8 QXP Hardware Developer’s Guide, Rev. 2.4p, 06/2021
User's Guide 13 / 89
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