User manual

RSK+RX62N 2. Power Supply
REJ10J2198-0201 Rev. 2.01 Page 9 of 54
Nov 30, 2011
2. Power Supply
2.1 Requirements
This RSK+ is supplied with an E1 debugger. The debugger is able to power the RSK+ board with up to 200mA.
When the RSK is connected to another system then that system should supply power to the RSK+. All RSK and
RSK+ boards have an optional centre positive supply connector using a 2.0mm barrel power jack.
This RSK+ supports a wide range of voltage inputs, and requires specific configuration for different inputs. Details
of the external power supply connections are shown in Table 2-1 below.
Connector Supply Voltages J10 Setting J11 Setting
Regulated, 5V DC Shorted Shorted PWR1
Unregulated, 7 to 15V DC Open Open
Table 2-1: Main Power Supply Requirements
This RSK+ features an independent USB power supply, which allows a user to power the USB host/OTG modules
from a second external power supply. Connections for the external USB power supply are detailed in Table 2-2
below.
Connector Supply Voltages
PWR2 Regulated, 3.3V DC
PWR3 Regulated, 5V DC
Table 2-2: USB Power Supply Requirements
The RSK+ can also be powered directly from the USB VBUS, when a suitable host device is connected to the
USB0 connector and the RSK+ is correctly configured (refer to §6). This will limit the current consumption of the
RSK+ to 500mA (USB maximum), therefore full functionality can not be achieved whilst being powered from the
USB VBUS.
2.2 Power-Up Behaviour
When the RSK+ is purchased, the RSK+ board has the ‘Release’ or stand-alone code from the example tutorial
code pre-programmed into the Renesas microcontroller. On powering up the board the user LEDs will start to flash.
After 200 flashes or after pressing any switch, the LEDs will flash at a rate controlled by the potentiometer.
The main power supply connected to PWR1 should supply a minimum of 5W to ensure full functionality.
The USB power supplies connected to PWR2 and PWR3 should both supply a minimum of 600mA to ensure full USB
host functionality. Note: The OTG module is limited to supply a maximum of 200mA when operating as host.