EP4SE360F35I4 Datasheet, PDF (130/432 Pages) Altera Corporation – This section provides a complete overview of all features relating to the Stratix IV device family, which is the most architecturlly advanced

5–14
Chapter 5: Clock Networks and PLLs in Stratix IV Devices
Clock Networks in Stratix IV Devices
Table 5–6. Stratix IV RCLK Outputs From the PLL Clock Outputs ⁽¹⁾ (Part 2 of 2)
PLL Number
Clock Resource
L1 L2 L3 L4 B1 B2 R1 R2 R3 R4 T1 T2
RCLK[64..69] — — — Y — — — — — — — —
RCLK[70..75] — — — — — — — — — Y — —
RCLK[76..81] — — — — — — Y — — — — —
RCLK[82..87]
Y — — — — — — — ——— —
Note to Table 5–6:
(1) All PLL counter outputs can drive the RCLK networks.
Clock Control Block
Every GCLK and RCLK network has its own clock control block. The control block
provides the following features:
■ Clock source selection (dynamic selection for GCLKs)
■ Global clock multiplexing
■ Clock power down (static or dynamic clock enable or disable)
Figure 5–11 and Figure 5–12 show the GCLK and RCLK select blocks, respectively.
You can select the clock source for the GCLK select block either statically or
dynamically. You can statically select the clock source using a setting in the Quartus II
software or you can dynamically select the clock source using internal logic to drive
the multiplexer-select inputs. When selecting the clock source dynamically, you can
select either PLL outputs (such as C0 or C1) or a combination of clock pins or PLL
outputs.
Figure 5–11. Stratix IV GCLK Control Block
PLL Counter 2
Outputs
2
CLKSELECT[1..0]
(1)
CLKp
Pins
2
CLKn
Pin
Internal
Logic
This multiplexer
supports user-controllable
dynamic switching
Static Clock
Select (2)
Enable/
Disable
Internal
Logic
GCLK
Notes to Figure 5–11:
(1) When the device is operating in user mode, you can dynamically control the clock select signals through internal
logic.
(2) When the device is operation in user mode, you can only set the clock select signals through a configuration file
(SRAM object file [.sof] or programmer object file [.pof]) and cannot be dynamically controlled.
Stratix IV Device Handbook
Volume 1
September 2012 Altera Corporation