Sigma DE2-70 manual Using SDRAM/SRAM/Flash, IrDA schematic

DE2-70 User Manual

The pin assignments of the associated interface are listed in Table 5.18.

			1
			2
		VCC33	3
			4
IRDA_RXD	R41	120	5
			6
IRDA_TXD	R42	120	7
VCC33	R43	47	8
			9

U6

GND NC VCC AGND SD RXD TXD LEDA SHIELD

IrDA

	Figure 5.21.	IrDA schematic.
Signal Name	FPGA Pin No.	Description
IRDA_TXD	PIN_W21	IRDA Transmitter
IRDA_RXD	PIN_W22	IRDA Receiver

Table 5.18. IrDA pin assignments.

5.16 Using SDRAM/SRAM/Flash

The DE2-70 board provides a 2-Mbyte SSRAM, 8-Mbyte Flash memory, and two 32-Mbyte SDRAM chips. Figures 5.22, 5.23, and 5.24 show the schematics of the memory chips. The pin assignments for each device are listed in Tables 5.19, 5.20, and 5.21. The datasheets for the memory chips are provided in the Datasheet/Memory folder on the DE2-70 System CD-ROM.

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