参数资料
型号: EP1C6T144I7ES
厂商: Altera Corporation
英文描述: Cyclone FPGA Family Data Sheet
中文描述: 气旋的FPGA系列数据手册
文件页数: 36/104页
文件大小: 763K
代理商: EP1C6T144I7ES
2–30
Preliminary
Altera Corporation
January 2007
Cyclone Device Handbook, Volume 1
The eight global clock lines in the global clock network drive throughout
the entire device. The global clock network can provide clocks for all
resources within the device
IOEs, LEs, and memory blocks. The global
clock lines can also be used for control signals, such as clock enables and
synchronous or asynchronous clears fed from the external pin, or DQS
signals for DDR SDRAM or FCRAM interfaces. Internal logic can also
drive the global clock network for internally generated global clocks and
asynchronous clears, clock enables, or other control signals with large
fanout.
Figure 2–22
shows the various sources that drive the global clock
network.
Figure 2–22. Global Clock Generation
Note (1)
Notes to
Figure 2–22
:
(1)
The EP1C3 device in the 100-pin TQFP package has five
DPCLK
pins (
DPCLK2
,
DPCLK3
,
DPCLK4
,
DPCLK6
, and
DPCLK7
).
(2)
EP1C3 devices only contain one PLL (PLL 1).
(3)
The EP1C3 device in the 100-pin TQFP package does not have dedicated clock pins
CLK1
and
CLK3
.
8
Global Clock
Network
PLL1
PLL2
(2)
CLK0
CLK1
(3)
CLK2
CLK3
(3)
DPCLK1
DPCLK0
DPCLK4
DPCLK5
DPCLK2
DPCLK3
DPCLK7
DPCLK6
2
2
From logic
array
From logic
array
4
4
4
4
Cyclone Device
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