Datasheet

FRDM-KL03Z User’s Guide, Rev. 0
4 Freescale Semiconductor
FRDM-KL03Z hardware description
Freescale Semiconductor4
— Bit manipulation engine (BME) for read-modify-write peripheral operations
•Clocks
— 48 MHz high accuracy internal reference clock
— 8/2 MHz low power internal reference clock
— 32 kHz to 40 kHz crystal oscillator
— 1 kHz LPO clock
• Analog peripherals
— 12-bit SAR ADC with internal voltage reference, up to 7 channels
— High-speed analog comparator containing a 6-bit DAC and programmable reference input
— 1.2 V voltage reference (Vref)
• Communication peripherals
— one 8-bit Serial Peripheral Interface (SPI)
— one I2C module
— one UART module
•Timers
— two 2-channel Timer/PWM modules
— one Low-Power Timer (LPTMR)
— Real time clock (RTC)
— System tick timer
— One watchdog module
• Security
— 80-bit unique identification number per chip
• Human-Machine Interfaces (HMI)
— General purpose input/output up to 22
— GPIO interrupt
— external input pin for LLWU in LLS and VLLSx mode
5 FRDM-KL03Z hardware description
5.1 Power supply
The FRDM-KL03Z offers a design with multiple power supply options. It can be powered from the USB
connector, the VIN pin on the I/O header, an off-board 1.71–3.6 V supply from the 3.3 V pin on the I/O
header or 3.3 V from motor control header. The USB and VIN supplies are regulated on-board using a
3.3 V 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.