Freescale USB Development Board USB-KW40Z User’s Guide, Rev. 0, 10/2015
Freescale Semiconductor, Inc
13
USB-KW40Z development board
4.2.4
USB-KW40Z peripheral functions
The board includes two different MCUs, one dedicated to RF (MKW40Z160
)
acquisition and the second
features an OpenSDA debugger and processor for BLE sniffer application (MK22FN512).
4.2.4.1
MKW40Z160
peripheral
functions
The USB-KW40Z development board includes two push buttons: one for a general purpose peripheral
function to assist in implementing targeted applications and the other dedicated to MKW40Z160 hardware
reset.
The board also include three LEDs, two for general purposes and the other as a Power-On indicator.
Figure 10
shows the push buttons and LEDs for MKW40Z160
.
The application LEDs (D2 and D3) are connected not only with MKW40Z, they also share this connection
with the MK22FN512 MCU. You can isolate LEDs to remove or cut the trace over SH5 and SH6.
Figure 10. USB-KW40Z MKW40Z160 push button & LED
4.2.4.2
MK22FN512/Open SDA
Interface
•
The USB-KW40Z includes an OpenSDA circuitry based on the MK22FN512, that includes all the
necessary components to enable communication and debugging, it also provides power output to
all MKW40Z160
peripherals.
Figure 11
shows the OpenSDA circuitry based on the MK22FN512
MCU, and all the necessary connections to interface with MKW40Z160
.
