R20UT3282ED0101 Rev. 1.1
6
2015-06-10
Chapter 3 Power supply
3.1
Board power connection
For operation of the device, a supply voltage must be connected to the board.
There are several possibilities to power the device.
Within this document the following voltages are considered as ‘typical’
connections:
Voltage1
= 3.3V
Voltage2
= 1.25V
Direct voltage supply
Two different voltages can be supplied to the board.
The following connectors are available to supply those voltages directly:
Three 4mm
‘banana-type’ connectors:
- Two red connectors for voltages
Voltage1
(CN13) and
Voltage2
(CN14).
- A black connector for ground (GND) connection (CN12).
Note:
The three connectors are supplied with the board but not assembled.
For details about voltage distribution, refer to
Chapter 3.2
.
Supply by E1 emulator
The E1 emulator that is used for debug purposes and flash programming can
also supply a single operating voltage (‘Dbg_Voltage’). This voltage is connected
to
Voltage1
.
See the documentation of the E1 and
for details.
Supply by MainBoard
In case the PiggyBack board is mounted on a MainBoard, the voltage
Voltage1
is
supplied by the on-board regulator of the MainBoard.
CAUTION:
Do not supply Voltage1 directly to the PiggyBack board in case it is
mounted on the MainBoard.
For each of the voltages,
Voltage1
and
Voltage2
a green LED is available to
signal that the related voltage is available on the PiggyBack board. The
corresponding LEDs are placed directly beneath the connectors of the related
voltage.
