Power Supply; Requirements; Power-Up Behaviour - Renesas RX Series User Manual

RSKRX111

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. This board
has an optional centre positive supply connector using a 5.0mm barrel power jack.
Details of the external power supply requirements for the RSK, and configuration are shown in Table 2-1
below. The default RSK power configuration is shown in
J6 Setting
Open Open
Open Pin1-2 shorted
Pin2-3 shorted Open
Pin2-3 shorted Pin1-2 shorted
Pin1-2 shorted Open
Pin1-2 shorted Pin1-2 shorted
The main power supply connected to PWR1 should supply a minimum of 5W to ensure full functionality.
2.2

Power-Up Behaviour

When the RSK is purchased, the RSK board has the 'Release' or stand-alone code from the example tutorial
software pre-programmed into the Renesas microcontroller. On powering up the board the LEDs will start to
flash. After 200 flashes or after pressing any switch, the text on the LCD display will change and the LED's
will begin to flash at a rate controlled by the potentiometer.
R20UT2193EG0200 Rev. 2.00
Apr 14, 2014
J7 Setting
E1(3.3V)/PWR Connector/CON_5V
/Unregulated_VCC
PWR Connector/CON_5V
/Unregulated_VCC
VBUS
VBUS
EXT_BATT
EXT_BATT
Table 2-1: Main Power Supply Requirements
bold, blue text.
Supply Source
2. Power Supply
UC_VCC
3.3V
1.8V
3.3V
1.8V
3.3V
1.8V
Page 8 of 42