Chapter 3 Power Supply; Board Power Connection - Renesas RH850/E2 Series User Manual

Chapter 3 Power supply

3.1
R20UT4084ED0130 Rev. 1.3
2020-05-12

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' values:
Voltage1 = 5V
Voltage2 = 3.3V
Voltage3 = 1.25V
Direct voltage supply
Three different voltages can be supplied to the board.
The following connectors are available to supply those voltages directly:
 Four 4mm 'banana-type' connectors:
- Three red connectors for voltages 5V (CN15), 3.3V (CN23) and 1.25V
(CN24).
- A black connector for ground (GND) connection (CN22).
Note: The four connectors are supplied with the board but not assembled.
For details about voltage distribution, refer to Chapter 3.2 'Voltage distribution'.
Supply by MainBoard
In case the PiggyBack board is mounted on a MainBoard, the 5V and 3.3V is
supplied by the on-board regulator of the MainBoard.
CAUTION: Do not supply 5V or 3.3V directly to the PiggyBack board in case it is
mounted on the MainBoard.
For each of the voltages, 5V, 3.3V and 1.25V a green LED (LED3, LED2 and
LED5, respectively) 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.
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