FRDMKL27Z User’s Guide, Rev. 0, 02/2015
4
Freescale Semiconductor, Inc.
FRDM-KL27Z hardware description
— 32-40 kHz, or 3-32 MHz crystal oscillator
— 1 kHz LPO clock
•
Analog peripherals
— 16-bit SAR ADC with internal voltage reference, up to 17 channels
— High-speed analog comparator containing a 6-bit DAC and programmable reference input
— 1.2 V voltage reference (Vref)
•
Communication peripherals
— USB full-speed slave controller supporting crystal-less recovery
— Two 16-bit SPI modules
— One UART module supporting ISO7816
— Two LPUART modules
— Two I
2
C modules supporting up to 1 Mbit/s
— One FlexIO module
•
Timers
— One 6-channel Timer/PWM module
— Two 2-channel Timer/PWM modules
— One low-power timer
— Periodic interrupt timer
— Real-time clock
•
Security
— 80-bit unique identification number per chip
•
Human-Machine Interfaces (HMI)
— Up to 54 general purpose input/output (GPIO)
— GPIO interrupt
— External input pin for LLWU in LLS and VLLSx mode
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FRDM-KL27Z hardware description
5.1
Power supply
The FRDM-KL27Z offers a design with multiple power supply options. It can be powered from the USB
connector, battery on the board, the VIN pin on the I/O header, or an off-board 1.71-3.6V supply from the
3.3V pin on the I/O header. The USB and VIN 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.
Figure 2
shows the schematic drawing for the power supply inputs and the on-board voltage regulator.
