M-BUS-EK Datasheet, PDF (11/20 Pages) Silicon Laboratories – AC to DC power adapter

Wireless M-Bus-EK
10. Si4431 Wireless M-Bus Development Platform
The Si4431 Wireless M-Bus Development Platform requires the purchase of the following items:
 Three SDBC-DK3 EZRadioPRO Wireless Development Kits
 Three 4431-DKDB3 - Si4431 +13 dB High-Band Test Cards
 Two EC3 -USB Debug Adapters
 One Supported Unlimited Compiler (Keil, Raisonance, or SDCC)
The Basic setup is shown in Figure 7.
PC
IDE
MBbusPhyTx
Workspace
IDE
MBusPhyRx
Workspace
Hyper-
Terminal
USB
Debug
Adapter
EZRadioPRO
SDB
Si4431-B1
Test Card
MBusPhyTx
Firmware
USB
Debug
Adapter
EZRadioPRO
SDB
Si4431-B1
Test Card
MBusPhyRx
Firmware
EZRadioPRO
SDB
Si4431-B1
Test Card
MBusSniffer
Firmware
Figure 7. Si4431 Wireless M-Bus Development Platform
The SDBC-DK3 EZRadioPRO Wireless Development Kit includes test cards for the +20 dB Si4432. These can be
used for M-Bus development, but the power will be too high. Note that the M-Bus stack requires the B1 revision of
the Si4431/2; so, an older version of the Si4432 cannot be used.
The first Software Development Board (SDB) functions as the transmitter or “Meter” device. The second SDB
functions as a receiver or “Other” device. The third SDB is used for an optional sniffer. The sniffer board is not
absolutely necessary but is very useful for debugging.
The Wireless M-Bus stack requires that the shut-down (SDN) pin of the radio must be connected to P0.7 on the
MCU; so, some small modification of the SDB is required. Cut the trace on Shorting Jumper SJ11 between Pins 2
and 3. Short Pins 1 and 2 using a 0  805 resistor, wire, or solder bridge.
The hardware_defs.h file (included in the Wireless M-Bus stack source code) provides a hardware abstraction
layer for the M-Bus stack. The hardware_defs.h file should be edited to select the desired hardware platform before
using. Define the Si4431 software development board and comment out the other hardware options.
Rev. 0.1
11