User manual

TMCM-1021 V1.2 Hardware Manual (Ref. 1.00 / 2012-MAR-09) 12
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4 Reset to Factory Defaults
It is possible to reset the TMCM-1021 to factory default settings without establishing a communication link.
This might be helpful in case communication parameters of the preferred interface have been set to
unknown values or got accidentally lost.
For this procedure two pads on the bottom side of the board have to be shortened (see Figure 4.1).
Please perform the following steps:
1. Power supply off and USB cable disconnected
2. Short two pads as marked in Figure 4.1
3. Power up board (power via USB is sufficient for this purpose)
4. Wait until the on-board red and green LEDs start flashing fast (this might take a while)
5. Power-off board (disconnect USB cable)
6. Remove short between pads
7. After switching on power-supply / connecting USB cable all permanent settings have been restored
to factory defaults
Short these two pads
Figure 4.1 Reset to factory default settings
5 On-board LED
The board offers one LED in order to indicate board status. The function of the LED is dependent on the
firmware version. With standard TMCL firmware the green LED flashes slowly during operation.
When there is no valid firmware programmed into the board or during firmware update the green LED is
permanently on.
Green LED
Figure 5.1 On-board LED