From Table 114. 21 x 21 mm functional contact assignments in IMX8DXAEC Rev. 1, 5/2019
From Table 113. 21 x 21 mm power supplies contact assignments in IMX8DXAEC Rev. 1, 5/2019
From Schematics of MCIMX8QXP-CPU MEK platform (SPF-29683-C2.pdf)
Please let me confirm following points.
Q1. PCIE_REXT pin belong to VDD_PCIE0_1P0 according to table 114's description.
but, I could not find same name in Table 113. Which name is correct information for power domain of PCIE_REXT pin?
Q2. I am guessing PCIE_REXT and PCIE0_PHY_PLL_REF_RETURN pins belong to VDD_PCIE_LDO_1P0.
But, current schematics seems both pins pull-up to VDD_PCIE_1P8. is it correct? or should we pull-up to any other 1V0 power?
Best Regards,
Kazuma Sasaki.
Hi
Q1. PCIE_REXT pin belong to VDD_PCIE0_1P0 according to table 114's description.
but, I could not find same name in Table 113. Which name is correct information for power domain of PCIE_REXT pin?
This pin is the resistor external of the PCIe interface, which is used to connect a resistor. This resistor is used to adjust the differential impedance of the PCIe signal.
Above Pins listed in table 113 are all Power pins, but PCIE_REXT is not power pin. In table 114, it means PCIE_REXT pin is in VDD_PCIE0_1P0 domain.
Q2. I am guessing PCIE_REXT and PCIE0_PHY_PLL_REF_RETURN pins belong to VDD_PCIE_LDO_1P0.
But, current schematics seems both pins pull-up to VDD_PCIE_1P8. is it correct? or should we pull-up to any other 1V0 power?
See schematic carefully, please! These 2 pins are not pulled up to HIGH! C376 & C375 are not resistors.
Have a nice day!
BR,
Weidong
Hi
Q1. PCIE_REXT pin belong to VDD_PCIE0_1P0 according to table 114's description.
but, I could not find same name in Table 113. Which name is correct information for power domain of PCIE_REXT pin?
This pin is the resistor external of the PCIe interface, which is used to connect a resistor. This resistor is used to adjust the differential impedance of the PCIe signal.
Above Pins listed in table 113 are all Power pins, but PCIE_REXT is not power pin. In table 114, it means PCIE_REXT pin is in VDD_PCIE0_1P0 domain.
Q2. I am guessing PCIE_REXT and PCIE0_PHY_PLL_REF_RETURN pins belong to VDD_PCIE_LDO_1P0.
But, current schematics seems both pins pull-up to VDD_PCIE_1P8. is it correct? or should we pull-up to any other 1V0 power?
See schematic carefully, please! These 2 pins are not pulled up to HIGH! C376 & C375 are not resistors.
Have a nice day!
BR,
Weidong
