IMX6Q NVCC_RGMII pin

[qumai]

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.

[igorpadykov]

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

[qumai]

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?

[igorpadykov]

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

IMX6DQ6SDLHDG, Hardware Development Guide for i.MX 6Quad, 6Dual, 6DualLite, 6Solo Families of Applic...

Best regards
igor

[igorpadykov]

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

IMX6DQ6SDLHDG, Hardware Development Guide for i.MX 6Quad, 6Dual, 6DualLite, 6Solo Families of Applic...

Best regards
igor