ep1s25 Altera Corporation, ep1s25 Datasheet - Page 95

• Manufacturer Part Number: ep1s25
• Description: Stratix Device Family Data Sheet
• Manufacturer: Altera Corporation

Figure 2–48. EP1S30, EP1S40, EP1S60, EP1S80 Device I/O Clock Groups
Altera Corporation
July 2005
IO_CLKM[7:0]
IO_CLKO[7:0]
IO_CLKN[7:0]
IO_CLKP[7:0]
8
8
8
8
IO_CLKA[7:0]
22 Clocks in the
22 Clocks in the
Half-Quadrant
Half-Quadrant
8
IO_CLKL[7:0]
You can use the Quartus II software to control whether a clock input pin
is either global, regional, or fast regional. The Quartus II software
automatically selects the clocking resources if not specified.
Enhanced & Fast PLLs
Stratix devices provide robust clock management and synthesis using up
to four enhanced PLLs and eight fast PLLs. These PLLs increase
performance and provide advanced clock interfacing and clock-
frequency synthesis. With features such as clock switchover, spread
spectrum clocking, programmable bandwidth, phase and delay control,
and PLL reconfiguration, the Stratix device’s enhanced PLLs provide you
with complete control of your clocks and system timing. The fast PLLs
8
IO_CLKB[7:0]
22 Clocks in the
22 Clocks in the
Half-Quadrant
Half-Quadrant
8
IO_CLKK[7:0]
8
IO_CLKC[7:0]
22 Clocks in the
22 Clocks in the
Half-Quadrant
Half-Quadrant
8
IO_CLKJ[7:0]
8
IO_CLKD[7:0]
22 Clocks in the
22 Clocks in the
Half-Quadrant
Half-Quadrant
Stratix Device Handbook, Volume 1
8
IO_CLKI[7:0]
8
Stratix Architecture
8
8
8
8
IO_CLKE[7:0]
IO_CLKF[7:0]
IO_CLKG[7:0]
IO_CLKH[7:0]
I/O Clock Regions
2–81