EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 102

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

Clock Networks and PLLs in Cyclone III Devices
6–2
Cyclone III Device Handbook, Volume 1
Table 6–1
Cyclone III family members.
Global Clock Network
Global clocks drive throughout the entire device, feeding all device
quadrants. All resources within the device (I/O elements, logic array
blocks (LABs), dedicated multiplier blocks, and M9K memory blocks) can
use the global clock networks as clock sources. You can use these clock
network resources for control signals, such as clock enables and clears fed
by an external pin. Internal logic can also drive the global clock networks
for internally generated global clocks and asynchronous clears, clock
enables, or other control signals with high fan-out.
Table 6–1. Number of Global Clocks Available in Cyclone III Devices
shows the number of global clocks available across the
EP3C10
EP3C16
EP3C25
EP3C40
EP3C55
EP3C80
Device
EP3C5
Altera Corporation- Preliminary
Number of Global Clocks
10
10
20
20
20
20
20
March 2007