Sigma DE2-70 manual Using the LCD Module, Lcdon

DE2-70 User Manual

5.5 Using the LCD Module

The LCD module has built-in fonts and can be used to display text by sending appropriate commands to the display controller, which is called HD44780. Detailed information for using the display is available in its datasheet, which can be found on the manufacturer's web site, and from the Datasheet/LCD folder on the DE2-70 System CD-ROM. A schematic diagram of the LCD module showing connections to the Cyclone II FPGA is given in Figure 5.9. The associated pin assignments appear in Table 5.6.

	Q1	8050	Q2	8550
					C6
VCC5				R34	1u
VCC43				680
LCD_ON	R35	680		Q3
				8050

LCD_D[0..7]		VCC43		Q4	8550
					R36
																						TNO LCCD
					680			LLCBD		7LCDD	6LCDD	5DDCL	4LCDD	3LCDD	2LCDD	1LCDD	0LCDD	ENLCD	WLCRD		SLCRD		CVCLCD
LCD_BLON R37	680				8050
					Q5
							16		15	14	13	12	11	10	9	8	7	6	5		4	3	2	1
		DIS1
							D BL 7 6 5 4 3 2 1 0 EN N D D D D D D D D G													WR SR TN CVC DN O G C
			2			X	16 DIGIT LCD

VCC43

R38 1K

R39 47

		LCD-2x16
Figure 5.9. Schematic diagram of the LCD module.
Signal Name	FPGA Pin No.		Description
LCD_DATA[0]	PIN_E1		LCD Data[0]
LCD_DATA[1]	PIN_E3		LCD Data[1]
LCD_DATA[2]	PIN_D2		LCD Data[2]
LCD_DATA[3]	PIN_D3		LCD Data[3]
LCD_DATA[4]	PIN_C1		LCD Data[4]

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