If I do not use the RGMII interface, I just use RMII interface,the power domain of which is NVCC_ENET,so i want to know that does NVCC_RGMII G18 pin have to be connected to a power source,eg 1.5V or connect NVCC_RGMII to GND.
Hi qumai
for pin voltage levels it is necessary to follow sect.4.6.2 General Purpose I/O (GPIO) DC Parameters
i.MX 6Dual/6Quad Applications Processors for Consumer Products - Data Sheet
as "OVDD" use column "Power Group" Table 96. 21 x 21 mm Functional Contact Assignments
NVCC_RGMII, NVCC_ENET should be always powered even ethernet interface is not used.
Best regards
igor
but we have produce Thousands of boards ,but But no problem was found.So is there an accurate statement that no power supply is okay? Power supply is definitely better, but is it possible to have no power supply?
Hi qumai
it is necessary to follow sect.4.2.1 Power-Up Sequence, which implies that all power supplies
should be provided
i.MX 6Dual/6Quad Applications Processors for Consumer Products - Data Sheet
Some supplies can be turned off (if unused), they are described in sect.2.8 Unused analog interfaces
Best regards
igor