LFE2-50E-L-EV Lattice, LFE2-50E-L-EV Datasheet - Page 17

• Manufacturer Part Number: LFE2-50E-L-EV
• Description: MCU, MPU & DSP Development Tools ECP-2 Standard Eval Board
• Manufacturer: Lattice

Specifications of LFE2-50E-L-EV

• Processor To Be Evaluated: LatticeECP2
• Interface Type: RS-232, Ethernet
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lattice Semiconductor
Table 34. PCI CLK
If the board is to be a master, in addition to properly setting the jumpers, the following resistors and capacitors must
be installed.
Table 35. Install These Resistors and Caps if PCI/PCI-X is a Master
Signal Testing
This board supports testing of single-ended and differential signals.
High-Speed Single-Ended
There are eight FPGA signals that have been routed to special test points on the board. Each signal can include a
series resistor, as well as a pull-up resistor and a pull-down resistor (for maximum flexibility these resistors are not
included with the board). Each series resistor footprint has a shorting trace that must be cut before installing a
resistor (see Figure 3). Next to each signal’s test point a ground point has been added in order to make signal
integrity measurements easier and more accurate.
Figure 3. Resistor Shorting Trace
Table 36. Single Ended SI Test Points
The differential signals at J20 and J21 can not be used if this jumper is installed (1 to 2).
Location
J22
1. Cut shorting trace before installation.
R1, 51, 59, 60, 61, 62, 106, 107, 126
C39, 111
1. Or equivalent.
Test Point
TP_SI7
TP_SI6
TP_SI5
TP_SI4
TP_SI3
TP_SI2
TP_SI1
TP_SI0
Position
1 to 2
Open
Location
Routes PCI_CLK to FPGA, only used if installing this board in a PCI or
PCI-X backplane. For signal integrity, also remove R27 and R30. D20
provides PCI clamping for this signal.
Disconnects this signal from the FPGA
Pin
K2
K1
J4
J5
L6
L5
L2
L1
Cut this trace
0.01uF
Value
5.6K
Series
R10
R11
R12
R13
R22
R23
R8
R9
17
1
Function
LatticeECP2 Standard Evaluation Board
Manufacturer
Panasonic
Panasonic
Resistors
Pull-Up
R71
R72
R73
R74
R75
R76
R82
R83
ERJ-3GEYJ562V
ECU-V1H103KBV
Part Number
Pull-Down
R20
R21
R2
R3
R4
R5
R6
R7
User’s Guide
1
Default
X