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Chapter 2
Chapter 2
2.1 Start-up
2.2 Power supply
Note
Table 2-1 Power supply
Caution
R20UT0883ED0100 Rev. 1.00
User Manual
General information
The board is delivered with the minimal configuration for the first startup.
-
The I/O voltage is set to 3.3 V by jumper CN18
-
A 16MHz Oscillator is mounted into socket Q1
-
The potentiometer (R113) of reset circuit is adjusted
-
The potentiometer (R48) for the LCD contrast is adjusted
If any communication or I/O interface will be used, additional jumper settings
have to be made. For more information please take a look into the corresponding
chapters.
The onboard power supply needs 12 – 15 V input voltage. This voltage can be
provided by the 12 – 15 V power connector jacket or the black and red banana
jackets. With this supply voltage the onboard circuit generates all needed
voltages (5 V, 3.3 V and 1.2 V). The current status of all voltages, also the supply
voltage, can be checked very quickly by the corresponding LEDs.
The 1.2 V overvoltage LED is an indicator for overvoltage on the 1.2 V line, thus
the non-glowing of this LED is not a malfunction.
The V850E2/Px4 is available for two different I/O voltages, 3.3 V or 5 V. As the
Starter Kit Board supports both types, the I/O voltage can be chosen by CN18.
The switchable I/O voltage signal is called "VCC3.3V/5V". Three additional LEDs
on the left side of the jumper CN18 indicate the 5 V operation.
I/O Voltage
5 V
3.3 V
Applying a voltage to the device outside the specified device operating voltage
range may damage the device! Please refer to the V850E2/Px4 Data Sheet for
operating voltage specification.
CN18
1 – 2
3 – 4
General information
10
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