TWR-K40X256 Freescale Semiconductor, TWR-K40X256 Datasheet - Page 16

• 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

4 Input/Output Connectors and Pin Usage Table
The following table provides details on which K40X256 pins are using to communicate with the LEDs,
switches, and other I/O interfaces onboard the TWR-K40X256.
Note: Some port pins are used in multiple interfaces on-board and many are potentially connected to
off-board resources via the Primary and Secondary Connectors. Take care to avoid attempted
simultaneous usage of mutually exclusive features.
J12
J13
J15
OSJTAG USB-to-
Infrared Port
Serial Bridge
Pushbuttons
SD Card Slot
Touch Pads
Feature
VBAT Power Selection
OSJTAG Mode Selection
JTAG Power Connection
LEDs
TWR-K40X256 Tower Module User's Manual
OSJTAG Bridge RX Data
OSJTAG Bridge TX Data
SD Clock
SD Command
SD Data0
SD Data1
SD Data2
SD Data3
SD Card Detect
SD Write Protect
IR Transmit
IR Receive
SW3 (IRQ0)
SW4 (IRQ1)
SW5 (RESET)
E1 / Touch
E2 / Touch
E3 / Touch
E4 / Touch
E1 / Orange LED
E2 / Yellow LED
Table 6. I/O Connectors and Pin Usage Table
Connection
*OFF*
*OFF*
*1-2*
OFF
2-3
ON
ON
Isolate MCU from power supply (allows for external supply or
power measurements)
Connect VBAT to on-board 3.3V supply
Connect VBAT to the higher voltage between on-board 3.3V
supply or coin-cell supply
OSJTAG bootloader mode (OSJTAG firmware reprogramming)
Debugger mode
Connect on-board 5V supply to JTAG port (supports powering
board from external JTAG probe)
Disconnect on-board 5V supply from JTAG port
PTD6
PTD7
PTE2
PTE3
PTE1
PTE0
PTE5
PTE4
PTA16
PTE27
PTD7
PTC6
PTC5
PTC13
RESET_b RESET_b
PTB17
PTB18
PTB19
PTB16
PTC7
PTC8
Port Pin
UART0_RX
UART0_TX
SDHC0_DCLK
SDHC0_CMD
SDHC0_D0
SDHC0_D1
SDHC0_D2
SDHC0_D3
PTA16
PTE27
CMT_IRO
CMP0_IN0
PTC5
PTC13
TSI0_CH10
TSI0_CH11
TSI0_CH12
TSI0_CH9
PTC7
PTC8
Pin Function
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