TWR-K21D50M Freescale Semiconductor, TWR-K21D50M Datasheet - Page 7

• Manufacturer Part Number: TWR-K21D50M
• Description: Development Boards & Kits - ARM
• Manufacturer: Freescale Semiconductor

Specifications of TWR-K21D50M

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: MK21DN512VMC5
• Core: ARM Cortex M4
• Interface Type: USB
• Operating Supply Voltage: 1.8 V/3.3 V
• Description/function: TWR-K21D50M MCU module is designed to work either in stand-alone mode or as part of the Freescale Tower System
• For Use With: Freescale Tower Systems

The TWR-K21D50M is a Tower MCU Module featuring the K21DN512VMB5—a Kinetis K Series microcontroller in a
121 MAPBGA package with a USB 2.0 full-speed on-the-go (OTG) controller, system security and tamper detection,
and a secure real-time clock with an independent battery supply. It is intended for use in the Freescale Tower System
but can also operate stand-alone. An on-board OSJTAG debug circuit provides a JTAG interface and a power supply
input through a single micro-USB connector.
The block diagram of the TWR-K21D50M board is presented in the following figure:
6.1 Block Diagram
6 Hardware description
Receptacle
Battery
5.0 V
Micro
5.0 V
USB
Micro
USB
Freescale Device
regulator
JTAG, Power, UART
USB (Device/Host)
3.3 V
OSJTAG
VBAT (RTC)
regulator
1.8 V
General Purpose
Tower Plug-in
External Connectors
(TWRPI)
TWR-K21D50M Tower Module User’s Manual
Figure 4. Block Diagram of TWR-K21D50M
JTAG
UART
I
VDD
SPI, I
2
8 MHz XTAL
S, SPI, I
Tower Elevator Expansion Connectors
2
C, ADC, GPIO
2
C, ADC, USB, PWM, UARTs, FTM,
121 MAPBGA
Accelerometer
K21D50M
MMA8451Q
Interface Circuits
32.768 kHz XTAL
GPIO / Interrupts / LLWU
ADC
DryIce Tamper
Power
Reset
3.3 V
DryIce Tamper
LED
LED
LED
LED
Potentiometer
1.8 V
Pins
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