Altera Santa Cruz - Manual (Page 25)

© December 2008 Altera Corporation Santa Cruz, USB, MICTOR, SD Card HSMC Reference Manual
A. Demonstration
The following procedure shows you how to connect the THDB-SUM board to an
HSMC interface host board using a Cyclone III starter board as an example:
1. Observe the orientation of the HSMC connector when connecting the THDB-SUM
board to the Cyclone III starter board.
2. Set JP3 on the THDB-SUM board to the open position to force the voltage level to
2.5 V to match the 2.5 V I/O pins of the starter board.
3. Configure JP4 on the THDB-SUM board according to the logic level of the
Santa Cruz daughter board (refer to Table 2–4 on page 2–8 ).
1
There are two LVDS pairs on the HSMC connector: the HSMC_CLK_p1/n1 (forms a
closed loop through R3) and HSMC_CLKIN_p2/n2 (forms a closed loop through R4).
Using any one of the signals in an LVDS pair in single-ended mode prevents you from
using the other signal in the same pair.