LFXP3E-4T100I Lattice, LFXP3E-4T100I Datasheet - Page 369

• Manufacturer Part Number: LFXP3E-4T100I
• Description: IC FPGA 3.1KLUTS 62I/O 100-TQFP
• Manufacturer: Lattice

Specifications of LFXP3E-4T100I

• Lead Free Status / Rohs Status: Contains lead / RoHS non-compliant

Lattice Semiconductor
Appendix A. Example Extractions of Delays from Timing Reports
From the Set-up Report below, which was run for MAX conditions:
===============================================================
Preference: INPUT_SETUP PORT “ddr_dq_*” 2.000000 ns CLKNET “pll_nclk” ;
---------------------------------------------------------------------------------------------
------------------------------------
Passed:
pll_nclk +)
IN_DEL
ROUTE
NCLK_DEL
ROUTE
Logical Details:
Constraint Details:
Physical Path Details:
Destination: O-FF In
Source:
Data Path Delay:
Clock Path Delay:
Name
Name
• t
• t
• t
0.000ns delay ddr_dq_23 to ddr_dq_23 less
2.000ns offset ddr_dq_23 to clk (totaling -2.000ns) meets
6.206ns delay clk to ddr_dq_23 less
3.271ns feedback compensation less
3.195ns INREG_SET requirement (totaling -0.260ns) by 1.740ns
Data path ddr_dq_23 to ddr_dq_23:
Clock path clk to ddr_dq_23:
PD
FDS
FPGA_CLK
= 0.0 ns
The following path meets requirements by 1.740ns
= 3.195 ns
Fanout
Fanout
32 items scored, 0 timing errors detected.
---
---
136
(max) = 6.206 - 3.271 = 2.935 ns
1
--------
--------
Cell type
Delay (ns)
0.000
Delay (ns)
1.431
0.816
0.385
3.574
6.206
Port
0.000ns
6.206ns
Data in
LLHPPLL.CLKIN to
(0.0% logic, 0.0% route), 0 logic levels.
LLHPPLL.NCLK to
(29.3% logic, 70.7% route), 2 logic levels.
Pin type
AB4.INCK to
Pad
(0.0% logic, 0.0% route), 0 logic levels.
(29.3% logic, 70.7% route), 2 logic levels.
AB4.PAD to
U1_ddrct_np_o4_1_008/U3_databusif/ddr_dqoeZ0Z_23
Site
Site
18-9
Cell name
LLHPPLL.CLKIN clk_c
LLHPPLL.NCLK U2_ddr_pll_orca/ddr_pll_0_0
ddr_dq_23
AB4.INCK clk
N24.SC pll_nclk
for the DDR SDRAM Controller IP Core
(clock net +/-)
Resource
Resource
Board Timing Guidelines
(to