USB-KW019032 Freescale USB Dongle Development Board , User’s Guide, Rev. 0, 10/2015
10
Freescale Semiconductor, Inc.
USB-KW019032 development board
Figure 5. USB-KW019032 block diagram
4.2.1
RF performance and considerations
The MKW01Z128 transceiver is a single-chip integrated circuit ideally suited for today's
high-performance ISM-band RF applications. It is intended to be used as a high-performance, low-cost
FSK and OOK RF transceiver for robust, frequency-agile, half-duplex bi-directional RF links.
The MKW01Z128 device is intended for applications over a wide frequency range, including the 868 MHz
European ISM band, and the 902—928 MHz North American ISM bands. Output power ranges from -18
dBm to +13 dBm (on the RF_IO port).
The USB-KW019032 uses a flexible RF path topology that makes it suitable for working in different
frequency bands by replacing minimum number of components, while providing good RF performance.
The tables in
Section 4.3.1, “Bill of materials
” show different BOMs according to different frequency
bands of operation.
Figure 6
shows a typical topology of the RF circuitry. The footprint enables installing the U.FL connector
J49 for measurement purposes. When using J49, C58 must be installed and C50 removed.
Figure 6. USB-KW019032 RF circuitry
USB
type A
Power LED
Xtal
Reset SW
button
32 MHz Xtal
Reset
button
Power
Management
MCU
K22F
SPI / UART / I
2
C
MKW01
Chip Antenna
RST_TGTMKW01
Push-
button
Application
LED
Push-
button
Application
LED
JTAG
SWD
