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WISA Wireless Module – Hardware Integration Manual
Version 1.7
Confidential
Page 7
2.2 Features and Functional Specifications
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IEEE 802.15.4 compliant wireless module
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Based on Freescale’s third-generation MKW21D512 platform which incorporates a complete, low power,
2.4 GHz radio frequency transceiver, 32-bit ARM core based MCU, hardware acceleration for both the
IEEE 802.15.4 MAC and AES security, and a full set of MCU peripherals in a 63-pin LGA System in
Package(SiP)
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WISA module serves as a proven >10 dBm range extension for the MKW2x series wireless MCUs with a
maximum link budget of 123 dB
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Extended range RF capability
The MKW21D512 SiP provides a balanced output RF port used with an external PA for higher
output power
output power
Market leading -108 dBm sensitivity at MMCX port when LNA is enabled (Hi-Gain mode)
PA can be enabled for maximum RF output power of +14 dBm available
Programmable output power from -10 to +14 dBm
MKW21D512 provides hardware-based, dynamic control of external RF elements
External antenna MMCX RF direct connect
Faraday shield footprint provided as required for FCC and other wireless regulatory compliance
requirements
requirements
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Power management circuitry
Powered trough the castellated user interface
On board LDO series regulator provides 3.0 VDD power to the MKW21D512chipset and FEM (Front-
end-Module)
Low power mode control for external RF circuitry provided (LDO regulator included)
Design is optimized for battery operation
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Castellated pins for selected General Purpose Input/Output signals and serial data interfaces
One SPI serial port
Two UART serial ports with flow control [3.0V CMOS TX, RX, RTS, CTS]
Hardware nRESET input
Three A/D converter inputs
I²C bus interface
Standard JTAG debug and development interface
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System clock options with support for ISA100 tight time synchronization requirements
Uses default 32.000 MHz crystal reference oscillator for MKW21D512 chipset
Uses a high-accuracy 32.768 kHz oscillator for very accurate real-time keeping as required by
ISA100.11a and WirelessHART compliant operation