TWR-K20D72M User’s Manual
Page 6 of 17
OSJTAG
JTAG, Power, SCI
K20D72M
100 LQFP
(socket-IC
footprint)
USB
Mini-AB
Tower Elevator Expansion Connectors
I
2
S, SPI, I
2
C, USB, ADC, DAC, FTM, UARTs, Flexbus
8 MHz XTAL
SCI
Freescale Silicon
External Connectors
Interface Circuits
Power
MMA8451Q
Infrared Port
IR Output
I
2
C
20-Pin
Header
Comparator
GPIO / Interrupts
ADC
Reset
LED
5V
32.768 KHz XTAL
3.3V
5.0V
Tower Plug-in
(TWRPI)
Sensor Socket
SPI, I
2
C, ADC, GPIO
Tower Plug-in
(TWRPI)
Touch
TSI, GPIO
Capacitive
Touch
Pads
LED
LED
LED
Microphone/
amplifier
ADC
JTAG
USB Device/host
Micro
USB
VBAT (RTC)
General purpose
Tower Plug-in
(TWRPI)
3.3V
Regulator
1.8V
Regulator
Battery holder
Buzzer
FTM
Figure 3: TWR-K20D72M Block Diagram
2.1
K20D72M Microcontroller
The TWR-K20D72M module features the MK20DX256VLL7. The Kinetis K20 microcontroller family is
part of the Kinetis portfolio of devices built around an ARM® Cortex-M4™ core. Refer to theMK20DX256VLL7 device. MK20DX256VLL7key features:
•
32-bit ARM Cortex-M4 core with DSP instructions
•
72MHz maximum core operating frequency
•
100LQFP, 14mm x 14mm, 0.5mm pitch package
•
1.71V – 3.6V operating voltage input range
•
256 Kbytes of program flash, 64 Kbytes of static RAM
•
External bus interface
•
Power management controller with 10 different power modes
•
Multi-purpose clock generator with PLL and FLL operation modes
•
16-bit SAR ADC, 12-bit DAC
•
High-speed analog comparator with 6-bit DAC
