DE3 User Manual
20
2.6
Connecting HSTC/HSMC Daughter Boards to DE3 HSTC
connectors
It is important when the HSTC/HSMC daughter boards are connected to the DE3 HSTC connector
is to ensure the I/O pins are properly matched between the daughter board and the DE3 connector in
particular the 12V, 5V, and 3.3V power pins. If there are mismatch in pins between the two
connectors, not only would it cause damage to the daughter board but more importantly the FPGA
itself. Please note daughter boards can only be connected to the TOP HSTC connector of the DE3
board, therefore the bottom HSTC connector are only used to establish connection for stacking
purposes.
2.7
Using the GPIO Expansion Headers
The DE3 Board provides two 40-pin expansion headers as shown in
Figure 2.14
. Each header has
36 pins connected to the Stratix III FPGA, and the two headers share the same I/O pins with HSTC
connector A. The other 4 pins provide DC +5V (VCC5), DC +3.3V (VCC33), and two GND pins.
Among these 36 I/O pins, there are 4 pins connected to the PLL clock input and output pins of the
FPGA.
The I/O pins on the expansion headers have a great flexibility in selecting the I/O standards. The
voltage level of the V
CCIO
can be configured as 3.3V, 2.5V, 1.8V, or 1.5V.
Finally,
Figure 2.15
shows the connections between the GPIO expansion headers and Stratix III.
The pin assignments are given in
Table A-12
and
Table A-13
.
Summary of Contents for Altera DE3
Page 1: ...Altera DE3 Board ...
Page 67: ...DE3 User Manual 64 Figure 5 5 Plug USB Devices into DE3 Figure 5 6 Display Device Information ...
Page 75: ...DE3 User Manual 72 Figure 5 14 Display SD Card Information for the SD Card Demonstration ...
Page 79: ...DE3 User Manual 76 Figure 5 19 Parameter Settings in DDR2 Controller ...
Page 114: ...DE3 User Manual 111 Figure D 5 The reported message of the invalid I O pins ...