3 - Configuring and Connecting to Your Socket Board | ST7SB Socket Board User Guide |
Configure for other VDD
To configure your socket board to use a VDD other than 3.3V or 5V, you will have to calculate the required serial resistance and install the necessary resistors in the area labelled OTHER that is provided on your socket board. To do this:
1Calculate the serial resistance for the voltage you want, using the formula:
RVDD.OTHER = (50 / VVDD.OTHER)
RVDD.OTHER : is the serial resistance in KΩ to be installed in the OTHER area on the socket board.
VVDD.OTHER : is the desired VDD voltage.
Example to obtain a VVDD.OTHER of 4V:
RVDD.OTHER = (50 / 4) - 10 = 2.5 KΩ
2Install the necessary resistors in the OTHER area on the socket board. Figure 3 shows one possible solution for the example in Step 1.
3Set the VDD jumper to the OTHER position (see Figure 2).
Figure 3: Installing serial resistors
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