FRDM-KL03Z hardware description
FRDM-KL03Z User’s Guide, Rev. 0
Freescale Semiconductor
5
Freescale Semiconductor
5
Figure 2. FRDM-KL03Z power supply
provides the operational details and requirements for the power supplies.
Note that the OpenSDA circuit is only operational when a USB cable is connected and supplying power
to J9. However, the protection circuitry is in place to allow multiple sources to be powered at once.
Table 1. Power supply requirements
Supply Source
Valid Range
OpenSDA
Operational?
Regulated
on-board?
OpenSDA USB (J7)
5 V
Yes
Yes
P5V0–9V0_VIN Pin on
I/O header
4.3–9 V
Yes
Yes
P3V3 Pin on I/O header
1.71–3.6 V
Yes
No
Table 2. FRDM-KL03Z power supplies
Power supply name
Description
P5V0-9V0_VIN
Power supplied from the V
IN
pin of the I/O headers (J3 pin 8).
P5V_USBSER
Power supplied from the OpenSDA USB connector (J9).
P3V3_VREG
Regulated 3.3 V supply. Sources power to the P3V3 supply rail through a back drive
protection Schottky diode.
P3V3
Main supply rail for the FRDM-KL03Z. Can be sourced from P3V3_VREG.
P3V3_MCU
KL03Z MCU power supply. Header J10 provides a convenient means for KL03Z energy
consumption measurements.
P3V3_USBSER
OpenSDA circuit power supply.
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