User Manual

element14 is a trademark of Premier Farnell plc 44

Figure 25 Power Rails

6.1.9.1 VRTC Rail

The

VRTC

rail is a 1.8V rail that is the first rail to come up in the power sequencing. It

provides power to the RTC domain on the processor and the I/O rail of the

TPS65217C

It can deliver up to 250mA maximum.

6.1.9.2 VDD_3V3A Rail

The

VDD_3V3A

rail is supplied by the

TPS65217C

and provides the 3.3V for the

processor rails and can provide up to 400mA.

6.1.9.3 VDD_3V3B Rail