MK715x1EK1A Hardware Manual
2. Hardware specifications
FEXK715x1EK1A_HardManual-01
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2.1 Power supply
This evalution kit can operate with three types of power supplies.
⚫
USB
⚫
Coin battery(CR2032)
⚫
External power supply via 2.54mm pitch through hole connector (1.7V~3.6V)
These power supplies can coexist because the reverse current does not flow in the protection diode. If the voltage
drop due to the protection diode can not be ignored, short the protection diode with a solder bridge(SB_3V3,
SB_BAT, SB_EXT).
Normally, it is used by 5V power supply from USB and supplied to the 3.3V LDO regulator in FT232RQ and Arduino
Uno R3 compatible Shield. VDDIO, VSHLD, and VBMD are supplied from the 3.3V LDO regulator.
※
When powering from USB, avoid turning off the Power SW for a long time.
※
USB, Coin battery, External power can be safely connected simultaneously only if the protection diode is not
shorted.
※
Take care not to damage the power supply if the protection diode is short-circuited.
Fig. 2-2 : Power supply
