TWR-K40X256 Freescale Semiconductor, TWR-K40X256 Datasheet - Page 12

• Manufacturer Part Number: TWR-K40X256
• Description: TOWER SYSTEM BOARD K40X256
• Manufacturer: Freescale Semiconductor
• Series: Kinetisr
• Type: MCUr

Specifications of TWR-K40X256

• Contents: Board
• Processor To Be Evaluated: K40
• Data Bus Width: 32 bit
• Interface Type: USB, CAN, I2C, SPI, UART
• Dimensions: 3.5 in x 3.2 in
• Operating Supply Voltage: 1.71 V to 3.6 V
• Silicon Manufacturer: Freescale
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M4
• Silicon Core Number: MK
• Silicon Family Name: Kinetis - K40
• Kit Contents: Board Only
• Rohs Compliant: Yes
• For Use With/related Products: Freescale Tower System, K40X256
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note: The port pins connected to the infrared interface (PTD6 and PTD7) are also connected to the
OSJTAG USB-to-serial bridge. Refer to Table 6 “I/O Connectors and Pin Usage Table” and Table 5
“TWR-K40X256 Jumper Table” for more information.
2.6 Accelerometer
An MMA7660 digital accelerometer is connected to the K40 MCU through an I2C interface and a
GPIO/IRQ signal. Refer to Table 6 “I/O Connectors and Pin Usage Table” for connection details.
2.7 Potentiometer, Pushbuttons, LEDs
The TWR-K40X256 features two pushbutton switches connected to GPIO/interrupt signals, one
pushbutton connected to the master reset signal, four capacitive touch pad electrodes, four user-
controllable LEDs, and a potentiometer connected to an ADC input signal. Refer to Table 6 “I/O
Connectors and Pin Usage Table” for information about which port pins are connected to these
features.
2.8 General Purpose Tower Plug-in (TWRPI) Socket
The TWR-K40X256 features a socket that can accept a variety of different Tower Plug-in modules
featuring sensors, RF transceivers, and more. The General Purpose TWRPI socket provides access to
I2C, SPI, IRQs, GPIOs, timers, analog conversion signals, TWRPI ID signals, reset, and voltage supplies.
The pinout for the TWRPI Socket is defined in Table 3.
Refer to Table 6 “I/O Connectors and Pin Usage Table” for the specific K40 pin connections to the
General Purpose TWRPI socket.
PTD7
TWR-K40X256 Tower Module User's Manual
CMT_IRO
P3V3
Default: no shunt
(Disable IRDA)
Figure 7. Infrared Port Implementation
Q3
QTLP610CPD
R24
1.54K
J6
IRDA_SEN
HDR 1X2 TH
R25
1.0K
IRDAJ
2
D3
QTLP610CIR
CMP0_IN0
C5
0.1UF
1
IRDAR
PTC6
R23
33
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