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TEMPCOMPRTC-RD
6.2.3. Interacting with the Windows SMBus Test Software
The TC-RTC Evaluation Board with the SMBus firmware enables an SMBus/I 2 C interface to the RTC. In order to
test this interface, PC software is provided that emulates an SMBus master via the PC’s parallel port.
1. The PC Software is installed as part of the TC-RTC RD installation from the Reference Design Kit CD. Launch
this by selecting the following: Start Menu → All Programs → Silicon Laboratories → TC-RTC SMBus Test.
2. Make sure that the green LED is blinking on the board, and then click the “Refresh All” button. This updates all
the values shown.
3. Modify any value(s) that you would like to modify, and click the corresponding “Write”, “Write NVRAM”, or “Write
Selected” button. This will write the value(s) to the board.
4. Clicking the “Read” button will read the current values from the board.
5. Check the “Auto-refresh Time/Date” check box to automatically update values every second. Note that when
this is checked, the other read/write buttons are disabled.
Figure 8. TC-RTC SMBus Interface Test Software
This PC software is provided solely for test and demonstration purposes. In a real application, the ‘F300 device
with the TC-RTC firmware is meant to be connected to other microcontrollers that have an SMBus interface. Refer
to "AN293: Temperature Compensated Real Time Clock Reference Design Programmer's Guide" for more details
on the SMBus interface implementation.
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Rev. 0.1
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