ep1sgx25d Altera Corporation, ep1sgx25d Datasheet - Page 171
ep1sgx25d
Manufacturer Part Number
ep1sgx25d
Description
Stratix Gx Device Family Data Sheet
Manufacturer
Altera Corporation
Datasheet
1.EP1SGX25D.pdf
(272 pages)
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Figure 4–65. Input Timing Diagram in DDR Mode
Altera Corporation
February 2005
Input To
Logic Array
Data at
input pin
CLK
A'
B'
When using the IOE for DDR outputs, the two output registers are
configured to clock two data paths from LEs on rising clock edges. These
output registers are multiplexed by the clock to drive the output pin at a
×
while the other output register clocks the second bit out on the clock low
time.
shows the DDR output timing diagram.
2 rate. One output register clocks the first bit out on the clock high time,
A0
Figure 4–66
B1
A1
B2
shows the IOE configured for DDR output.
A1
B1
A2
B3
A2
B2
A3
Stratix GX Device Handbook, Volume 1
B4
A3
B3
Stratix GX Architecture
Figure 4–67
4–105
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