Renesas PiggyBack 144QFP, Руководство пользователя

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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
‘Voltage distribution’
.
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 Chapter 5
‘Debug and Programming
interface
’
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.