Data Sheet

Bluegiga Technologies Oy
Page 22 of 52
3 Power subsystem
Pin#
Function
APx4 net name
Description
1-4
5V input
VIN
Main power input
5-7
Battery input/output
VBATTERY
A rechargeable battery can be
connected
9-12,
22
3.3V output
3V3
For maximum current draw, see Table
50
13
RTC battery
VBACKUP
RTC battery backup power
14
Power switch
PSWITCH_OUT
Power switch
17
Reset in - Master reset
RESETN
Active low master reset. Resets the
entire board.
Table 26: Power supply pins
The module is powered through the 5V input. It is recommended that all the pins (1-4) are connected together
on the application board.
The external battery connectable to VBATTERY is currently not supported.
VBACKUP is connected to the Real-Time clock battery and the VDD input of the Real Time Clock. This pin
can be used to power the real time clock in cases where the battery is not placed on the module.
Figure 2: VBACKUP and battery connection
VDD
Real Time Clock
3V3
Pin 13:VBACKUP
On-board
battery