FRDMKL02ZUM
FRDM-KL02Z User Manual
Page 5 of 12
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Clock generation module with FLL for system and CPU clock generation
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4 MHz and 32 kHz internal reference clock
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System oscillator supporting external crystal or resonator
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Low-power 1kHz RC oscillator for COP watchdog
Analog peripherals
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High speed comparator
Communication peripherals
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One 8-bit Serial Peripheral Interfaces (SPI)
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Two I
2
C modules
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One low-power UART
Timers
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Two 2-channel Timer/PWM modules
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Low-power Timer (LPT)
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System tick timer
Human-Machine Interfaces (HMI)
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General purpose input/output controller
5.
FRDM-KL02Z Hardware Description
5.1.
Power Supply
The FRDM-KL02Z offers a design with multiple power supply options. It can be powered from the USB
connector, the V
IN
pin on the I/O header, an on-board coin cell battery, or an off-board 1.71-3.6V
supply from the 3.3V pin on the I/O header. The USB and V
IN
supplies are regulated on-board using a
3.3V linear regulator to produce the main power supply. The other two sources are not regulated on-
board. 0 provides the operational details and requirements for the power supplies.
Table 1.
Power Supply Requirements
Supply Source
Valid Range
OpenSDA
Operational?
Regulated on-
board?
OpenSDA USB (J2)
5V
Yes
Yes
V
IN
Pin
4.3-9V
No
Yes
3.3V Pin
1.71-3.6V
No
No
Coin Cell Battery
1.71-3.6V
No
No
Note that the OpenSDA circuit is only operational when a USB cable is connected and supplying power
to J2. However, protection circuitry is in place to allow multiple sources to be powered at once.
Figure 3 shows the schematic drawing for the power supply inputs and the on-board voltage regulator.
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