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Altera DE2-115 User Manual Page 47

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The DE2-115 Board provides one 40-pin expansion header. The header connects directly to 36 pins
of the Cyclone IV E FPGA, and also provides DC +5V (VCC5), DC +3.3V (VCC3P3), and two
GND pins. Figure 4-15 shows the I/O distribution of the GPIO connector. The maximum power
consumption of the daughter card that connects to GPIO port is shown in Table 4-10.
Figure 4-15 GPIO Pin Arrangement
Table 4-10 Power Supply of the Expansion Header
Supplied Voltage Max. Current Limit
5V 1A
3.3V 1.5A
Each pin on the expansion headers is connected to two diodes and a resistor that provides protection
against high and low voltages. Figure 4-16 shows the protection circuitry for only one of the pin on
the header, but this circuitry is included for all 36 data pins.
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