DCS WDU models User's Guide download pdf (Page 64)

UC864-E/G/WD/WDU Hardware User Guide

1vv0300766a Rev.4

- 03/02/09

11.11. RTC Bypass Out

The VRTC pin brings out the Real Time Clock supply, which is separate from the rest

of the digital part, allowing having only RTC going on when all the other parts of the

device are off. To this power output a backup capacitor can be added in order to

increase the RTC autonomy during power off of the battery.

NOTE: NO devices must be powered from this pin.

11.12. VAUX1 Power Output

A regulated power supply output is provided in order to supply small devices from the

module. This output is active when the module is ON and goes OFF when the

module is shut down. The operating range characteristics of the supply are:

Operating Range – VAUX1 power supply

Min Typical Max

Output voltage

2.6V 2.65V 2.7V

Output current

100mA

Output bypass capacitor

(Inside the module)

2.2μF

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DCS WDU models User's Guide Page 64