EP4CE30F29C7N Datasheet, PDF (64/488 Pages) Altera Corporation – Cyclone IV Device Handbook, Volume 1

5–2
Chapter 5: Clock Networks and PLLs in Cyclone IV Devices
Clock Networks
f For more information about the number of GCLK networks in each device density,
refer to the Cyclone IV FPGA Device Family Overview chapter.
GCLK Network
GCLKs drive throughout the entire device, feeding all device quadrants. All resources
in the device (I/O elements, logic array blocks (LABs), dedicated multiplier blocks,
and M9K memory blocks) can use GCLKs as clock sources. Use these clock network
resources for control signals, such as clock enables and clears fed by an external pin.
Internal logic can also drive GCLKs for internally generated GCLKs and
asynchronous clears, clock enables, or other control signals with high fan-out.
Table 5–1, Table 5–2 on page 5–4, and Table 5–3 on page 5–7 list the connectivity of the
clock sources to the GCLK networks.
Table 5–1. GCLK Network Connections for EP4CGX15, EP4CGX22, and EP4CGX30 ^{(1), (2)} (Part 1 of 2)
GCLK Network Clock
Sources
GCLK Networks
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
CLK4/DIFFCLK_2n
—————v—v—v——————————
CLK5/DIFFCLK_2p
— —— — ——vv— — —— — — —— — —— —
CLK6/DIFFCLK_3n
— — — — — — v—vv— — — — — — — — — —
CLK7/DIFFCLK_3p
—————v——v———————————
CLK8/DIFFCLK_5n
——————————v—v—v—————
CLK9/DIFFCLK_5p
— — — — — — — — — — —vv— — — — — — —
CLK10/DIFFCLK_4n/RE _{— — — — — — — — — — — v — v v — — — — —}
FCLK1n
CLK11/DIFFCLK_4p/RE _{— — — — — — — — — — v — — v — — — — — —}
FCLK1p
CLK12/DIFFCLK_7p/RE _{— — — — — — — — — — — — — — — v — v — v}
FCLK0p
CLK13/DIFFCLK_7n/RE _{— — — — — — — — — — — — — — — — v v — —}
FCLK0n
CLK14/DIFFCLK_6p — — — — — — — — — — — — — — — — v — v v
CLK15/DIFFCLK_6n — — — — — — — — — — — — — — — v — — v —
PLL_1_C0
v——v———————————v——v—
PLL_1_C1
—v——v———————————v——v
PLL_1_C2
v—v————————————v—v——
PLL_1_C3
—v—v————————————v—v—
PLL_1_C4
——v—v————————————v—v
PLL_2_C0
v——v——————v——v——————
PLL_2_C1
PLL_2_C2
PLL_2_C3
PLL_2_C4
PLL_3_C0
—v——v——————v——v—————
v—v———————v—v———————
—v—v———————v—v——————
——v—v———————v—v—————
—————v——v——————v——v—
Cyclone IV Device Handbook,
Volume 1
October 2012 Altera Corporation