KWIKSTIK-K40 Datasheet, PDF (14/19 Pages) Freescale Semiconductor, Inc – KwikStik board assembly

2.11 USB
The K40X256 features a USB full-speed/low-speed OTG/Host/Device controller with built-in
transceiver. The KwikStik features a USB device connection to the K40X256 USB module through the
micro usb connector J17.
2.12 Micro Secure Digital Card Slot
A Micro Secure Digital (Micro-SD) card slot is available on the KwikStik connected to the SD Host
Controller (SDHC) signals of the K40 MCU. Refer to Table 4 “I/O Connectors and Pin Usage Table” for
the SDHC signal connection details.
2.13 Communication Testpoints
Testpoints to access serial SPI, I2C, UART and CAN modules of the K40X256 are available on the
KwikStik. The available signal pinouts are described in Table 3
Module
UART5
SPI
I2C
CAN
Table 3. Communication Testpoints Usage Table
Connection
UART Receive Data
UART Clear to Send
UART Transmit Data
UART Request to Send
SPI Serial Data IN
SPI Peripheral Chip Select
SPI Serial Data OUT
SPI Serial Clock
I2C Serial Clock Line
I2C Serial Data Line
CAN Receive Pin
CAN Transmit Pin
Port Pin
PTE9
PTE10
PTE8
PTE7
PTA17
PTA14
PTA16
PTA15
PTE1
PTE0
PTE25
PTE24
Pin Function
UART5_RX
UART5_CTS_b
UART5_TX
UART3_RTS_b
SPI0_SIN
SPI0_PCS0
SPI0_SOUT
SPI0_SCK
I2C1_SCL
I2C1_SDA
CAN1_RX
CAN1_TX
2.14 Power Consumption Measuring
A series of test points are available that allow measuring of the KwikStik’s current consumption. Two
separate circuits allow current consumption measurement of the entire system or of the K40X256
MCU. Both circuits include an Amp Meter and a Volt Meter. For the Volt Meter, test points allow
measurement of voltage consumption of a 1 ohm precision resistor, from which the current
consumption can be calculated. Usage of the Amp Meter requires the removal of the 0 ohm resistor in
order to directly measure current consumption on the corresponding test points.
Refer to Figure 13 for location of testpoints and resistors of the power consumption measuring circuit.
KWIKSTIKK40UM
KwikStik-K40 User's Manual
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