FRDM-KL43Z hardware description
FRDM-KL43Z User’s Guide, Rev. 1
NXP Semiconductors
9
— Bit manipulation engine for read-modify-write peripheral operations
— Direct memory access (DMA) controller
— Computer operating properly (COP) Watchdog timer
•
Clocks
— Clock generation module with high frequency internal reference clock (HIRC) 48 MHz, and
two low frequency internal reference clocks (LIRC) 2 MHz and 8 MHz, for system and CPU
clock generation
— System oscillator supporting external crystal or resonator
— Low-power 1 kHz RC oscillator for RTC and COP watchdog
•
Analog peripherals
— 16-bit SAR ADC w/ DMA support
— 12-bit DAC w/ DMA support
— High-speed analog comparator containing a 6-bit DAC and programmable reference input
— VREF 1.2 V voltage reference
•
Communication peripherals
— One Integrated Interchip Sound (I2S) Audio Interface (SAI)
— Two 8-bit Serial Peripheral Interfaces (SPI)
— USB FS device controller
— USB voltage regulator
— Two I
2
C modules
— Two low-power UART modules (LPUART)
— One UART with ISO7816 module
— One FlexIO module (with 8 pins/4 shifters/4 timers implemented)
•
Timers
— One 6-channel Timer/PWM module
— Two 2-channel Timer/PWM modules
— 2-channel Periodic Interrupt Timer (PIT)
— Real time clock (RTC)
— Low-power Timer (LPT)
— System tick timer
•
Human-Machine Interfaces (HMI)
— Segment LCD controller — maximum segment is 8
28/4
32
— General purpose input/output controller
5.3.1
Clock source
The Kinetis KL43 microcontrollers feature an on-chip oscillator compatible with three ranges of input
crystal or resonator frequencies: 32–40 kHz (low frequency mode), 3–8 MHz (high frequency mode, low
