Altera Cyclone II FPGA Starter Development Board Manuale Utente Scaricare il pdf (Pagina 31)

Altera Corporation Reference Manual 2–13

October 2006 Cyclone II FPGA Starter Development Board

Development Board Components

Clock Circuit

The development board has four clock sources:

■ Two on-board oscillators produce 27 MHz and 50 MHz clock signals.

■ A SubMiniature version A (SMA) connector, EXT CLK, located near

the right bottom corner of the board enables an external clock source

to provide clocking.

■ Input through the USB-Blaster port can provide a 24 MHz clock.

Clock Circuit Schematic

Figure 2–7 shows the clock circuit schematic.

FL_ADDR[15] PIN_AA12 FLASH Address[15]

FL_ADDR[16] PIN_AB12 FLASH Address[16]

FL_ADDR[17] PIN_AA20 FLASH Address[17]

FL_ADDR[18] PIN_U14 FLASH Address[18]

FL_ADDR[19] PIN_V14 FLASH Address[19]

FL_ADDR[20] PIN_U13 FLASH Address[20]

FL_ADDR[21] PIN_R13 FLASH Address[21]

FL_ADDR[0] PIN_AB20 FLASH Address[0]

FL_ADDR[1] PIN_AA14 FLASH Address[1]

FL_DQ[0] PIN_AB16 FLASH Data[0]

FL_DQ[1] PIN_AA16 FLASH Data[1]

FL_DQ[2] PIN_AB17 FLASH Data[2]

FL_DQ[3] PIN_AA17 FLASH Data[3]

FL_DQ[4] PIN_AB18 FLASH Data[4]

FL_DQ[5] PIN_AA18 FLASH Data[5]

FL_DQ[6] PIN_AB19 FLASH Data[6]

FL_DQ[7] PIN_AA19 FLASH Data[7]

FL_OE_N PIN_AA15 FLASH Output Enable

FL_RST_N PIN_W14 FLASH Reset

FL_WE_N PIN_Y14 FLASH Write Enable

Table 2–8. Flash Memory FPGA Pin Connections (Part 2 of 2)

Signal Name FPGA Pin Description

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 55 56

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Altera Cyclone II FPGA Starter Development Board Manuale Utente Pagina 31