EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 70

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

5–6
GCLK Network Clock Source Generation
Figure 5–2. PLL, CLK[], DPCLK[], and Clock Control Block Locations in the Cyclone III Device Family
Notes to
(1) There are five clock control blocks on each side.
(2) Only one of the corner CDPCLK pins in each corner can feed the clock control block at a time. You can use the other CDPCLK pins as
(3) Remote clocks cannot be used to feed the PLLs.
(4) Dedicated clock paths can feed into this PLL. However, these paths are not fully compensated.
Cyclone III Device Handbook, Volume 1
CDPCLK0
CDPCLK1
CLK[3..0]
DPCLK1
DPCLK0
general-purpose I/O pins.
Figure
5–2:
4
Figure 5–2
block location for different device densities.
PLL
(4)
4
PLL
4
1
3
5
CDPCLK2
CDPCLK7
(2)
(2)
shows Cyclone III device family PLLs, clock inputs, and clock control
(4)
Clock Control
2
2
4
4
Block (1)
GCLK[19..0]
5
DPCLK[11.10]
DPCLK[3..2]
20
2
2
CLK[15..12]
CLK[11..8]
20
20
4
4
Chapter 5: Clock Networks and PLLs in the Cyclone III Device Family
DPCLK[9..8]
DPCLK[5..4]
20
GCLK[19..0]
2
2
Clock Control
Block (1)
Remote clock from
two clock pins at
adjacent edge of
device
(4)
2
4
(3)
2
4
5
CDPCLK6
CDPCLK3
(2)
(2)
© December 2009 Altera Corporation
5
PLL
(4)
PLL
4
2
4
4
(Note 1)
4
Clock Networks
CDPCLK5
DPCLK7
CLK[7..4]
DPCLK6
CDPCLK4