Renesas RSKRX111, User Manual

Page: 9 / 43

RSKRX111 2. Power Supply
R20UT2193EG0200 Rev. 2.00 Page 8 of 42
Apr 14, 2014
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 bold, blue text.
J6 Setting J7 Setting Supply Source UC_VCC
Open Open
E1(3.3V)/PWR Connector/CON_5V
/Unregulated_VCC
3.3V
Open Pin1-2 shorted
PWR Connector/CON_5V
/Unregulated_VCC
1.8V
Pin2-3 shorted Open VBUS 3.3V
Pin2-3 shorted Pin1-2 shorted VBUS 1.8V
Pin1-2 shorted Open EXT_BATT 3.3V
Pin1-2 shorted Pin1-2 shorted EXT_BATT 1.8V
Table 2-1: Main Power Supply Requirements
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.
The main power supply connected to PWR1 should supply a minimum of 5W to ensure full functionality.