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A-Cute
User Manual
14
www.terasic.com
September 12, 2016
3.3.1 Power System
The SCD is equipped with Linear Technology company's Buck-Boost DC / DC Converter (LTC3112),
as a stable power source, and supplied to DE0-Nano Development Board. The SCD provides a power
control feature; the system can stop the power consumption when the system does not need to run
constantly, this saves battery power. For basic power architecture please reference Figure 3-4 .
Detailed information on using the LTC3113 is available on the manufacturer’s website
http://www.linear.com/product/LTC3112 , or under the Datasheets\Power\ folder on the Kit System
CD.
Figure 3-4 SCD Power System
Users can control VCC3P3_PWRON_n signal to save battery power. When the signal is High, the
3.3V power supply on the SCD will be turned OFF; when the signal is Low, SCD will be turned ON,
and the 3.3V power supply, other devices will start running.
The Figure 3-4 shows the connections between the GPIO and the power control. Table 3-1 lists the
pin assignment of the Power control interface; it is connected to the DE0-Nano GPIO0 pin assignment.
Table 3-1 Pin Assignment of 3.3V Power Control
SCD Signal Name
GPIO
P
in No.
FPGA Pin No.
on GPIO 0
Description I/O Standard
VCC3P3_PWRON_n 40 PIN_B12 SCD 3.3V Power Control signal. Low Active. OUT, 3.3V