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MPC8308: RGMII (eTSEC1) at 3.3V? or only 2.5V?

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MPC8308: RGMII (eTSEC1) at 3.3V? or only 2.5V?

‎12-12-2013 03:38 PM
1,148 Views
jmaccedian
Contributor I

We're using the MPC8308. There is a confusion between the datasheet and some schematic about the supply for the eTSEC1 in RGMII mode. Can we connect the eTSEC1 at 3.3V in RGMII mode? or it's only 2.5V? LVDD1 = NVDDC = TSEC1 = ? in RGMII mode


JMAccedian

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‎12-12-2013 10:35 PM
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andrei_skok
NXP Employee
NXP Employee

According to the MPC8308 Datasheet:

"The RGMII interface is defined for 2.5 V, while the MII interface can be operated at 3.3 V"

If you use eTSEC1 in RGMII mode you should connect LVDD1 (NVDDC) to 2,5V.

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