TWR-K40X256 Freescale Semiconductor, TWR-K40X256 Datasheet - Page 14

• 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

2.10 Segment LCD
The segment LCD signals on the K40 devices are multiplexed with many other interface signals
including several TSI signals that are accessible on the Touch TWRPI socket. Therefore, the Touch
TWRPI socket on the TWR-K40X256 may also be used to evaluate the segment LCD controller of the
K40 device. The TWRPI-SLCD daughter card included with the TWR-K40X256 plugs into the Touch
TWRPI socket and provides a 28-segment LCD that can be driven directly by the K40 MCU. Refer to
Table 6 “I/O Connectors and Pin Usage Table” for the segment LCD signals connection details.
Additionally, many more segment LCD signals are routed to the Secondary Connector on the TWR-
K40X256 and can be accessed from another Tower module or on the expansion connectors of the
Secondary Elevator. Refer to Table 8 “TWR-K40X256 Secondary Connector Pinout” for connection
details.
2.11 USB
The K40X256 features a USB full-speed/low-speed OTG/Host/Device controller with built-in
transceiver. The TWR-K40X256 routes the USB D+ and D- signals from the K40 MCU to the Primary
Connector, allowing the connection to USB connectors or additional circuitry on a Tower peripheral
module.
The TWR-SER module included as part of the TWR-K40X256-KIT provides a USB OTG/Host/Device
interface with a mini-AB USB connector. There are many configuration options that can be selected to
evaluate different USB modes of operation. By default, the TWR-SER is configured for USB Device
operation. Please refer to the documentation included with the TWR-SER for more information on the
configuration options.
2.12 Secure Digital Card Slot
A Secure Digital (SD) card slot is available on the TWR-K40X256 connected to the SD Host Controller
(SDHC) signals of the K40 MCU. This slot will accept SD memory cards as well as Secure Digital Input
Output (SDIO) cards. Refer to Table 6 “I/O Connectors and Pin Usage Table” for the SDHC signal
connection details.
TWR-K40X256 Tower Module User's Manual
Pin
8
9
10
11
12
13
14
15
16
17
18
19
20
Description
Electrode 3
Electrode 4
Electrode 5
Electrode 6
Electrode 7
Electrode 8
Electrode 9
Electrode 10
Electrode 11
ADC: TWRPI ID 0
ADC: TWRPI ID 1
GND
Reset
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