This interface is composed of a simple diode resistor

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Unformatted text preview: ontrol an external video monitor. This interface is composed of a simple diode-resistor network and a 15-pin D-sub connector (labeled VGA), where the monitor can plug into the UP 1 Education Board. The diode-resistor network and D-sub connector are designed to generate voltages that conform to the VGA standard. 12 Altera Corporation University Program Design Laboratory Package User Guide Information about the color of the screen, and the row and column indexing of the screen, are sent from the EPF10K20 device to the monitor via five signals. Three VGA signals are red, green, and blue, while the other two signals are horizontal and vertical synchronization. Manipulating these signals allows images to be written to the monitor’s screen. 1 See “VGA Driver Operation” on page 25 for details on how the VGA interface operates. Table 8 lists the D-sub connector and the EPF10K20 device connections. Table 8. D-Sub Connections Signal D-Sub Connector Pin EPF10K20 Pin RED 1 236 GREEN 2 237 BLUE 3 238 GND 6, 7, 8, 10, 11 HORIZ_SYNC 13 240 VERT_SYNC 14 239 No Connect 4, 5, 9, 15 – – MOUSE Connector The MOUSE interface, which consists of a 6-pin mini-DIN connector, allows the EPF10K20 device to receive data from a PS/2 mouse or a PS/2 keyboard. The UP 1 Education Board provides power and ground to the attached mouse or keyboard. The EPF10K20 device outputs the DATA_CLOCK signal to the mouse and inputs the data signal from the mouse. Table 9 lists the signal names and the mini-DIN and EPF10K20 pin connections. 1 See “MOUSE Interface Operation” on page 27 for details on how the MOUSE interface operates. Table 9. MOUSE Connections Mouse Signal Mini-DIN Pin EPF10K20 Pin MOUSE_CLK 1 30 MOUSE_DATA 3 31 VCC Altera Corporation 5 – GND 2 – 13 University Program Design Laboratory Package User Guide FLEX_EXPAN_A, FLEX_EXPAN_B & FLEX_EXPAN_C FLEX_EXPAN_A, FLEX_EXPAN_B, and FLEX_EXPAN_C are dual rows of 0.1-inch spaced holes for accessing signal I/O pins and global signals on the EPF10K20 device, power, and ground. Figure 6...
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