AT89STK-05 Ver la hoja de datos (PDF) - Atmel Corporation
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AT89STK-05 Datasheet PDF : 22 Pages
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Hardware Description
2.2
Power Supply
The on-board power supply circuitry allows various power supply configurations.
The power source can be:
– VBUS from USB (5V)
– VBUS from USB (5V) through the current limiter
– External power supply (from 6 to 12V) or 9V battery
The voltage output can be the direct power source, regulated at 5V or 3.3V.
The power supply selection is performed using the JP2, JP3, JP4 and JP5 jumpers.
The power supply can be turned on/off using the “power” switch (SW6). Once the power
is established, the power LED (D9) is lit.
Figure 2-2. Different Power Configurations
Power
Source
Regulation
VBUS
PWR.S.
VBUS and
Current Limiter
PWR.S.
External
PWR.S.
Direct Input
LIM
VCC
REG
5V
3.3V
PWR
PWR.S.
LIM
VCC
REG
5V
3.3V
PWR
PWR.S.
LIM
VCC
REG
5V
3.3V
PWR
PWR.S.
5V Regulate
LIM
VCC
REG
5V
3.3V
PWR
PWR.S.
LIM
VCC
REG
5V
3.3V
PWR
PWR.S.
LIM
VCC
REG
5V
3.3V
PWR
PWR.S.
3.3V Regulate
LIM
VCC
REG
5V
3.3V
PWR
LIM
VCC
REG
5V
3.3V
PWR
LIM
VCC
REG
5V
3.3V
PWR
2-4
4245A–USB–11/04
AT89C5131A Starter Kit Hardware User Guide
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