Lattice 7:1 LVDS, User Manual

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Lattice 7:1 LVDS Video Demo Kit
Lattice Semiconductor User’s Guide
Appendix A. Jumpers of the Video Demo Board #2
Table 4. Functions of the Jumpers on Video Demo Board #2
Jumper Function Description Default Setting
J3 /POWERDOWN
This is an active low control for forcing the DS90CR2 88 A into the
powerdown mode. The DS90CR2 88 A outputs stay low under the
powerdown mode.
Pin1 and Pin2 (high)
J4 CTL3 Multifunctional CTL3 input of TFP410. Pin1 and Pin3
J5 CTL2 Multifunctional CTL2 input of TFP410. Pin4 and Pin6
J6 CTL1 Multifunctional CTL1 input of TFP410. Pin1 and Pin3
J7 VREF
This is the input reference voltage used to select the swing range of
the TFP410 digital inputs. High-swing 3.3V input signal level is
selected by the default setting.
Pin1 and Pin2 (high)
J 8 EDGE Edge select or hot plug input of TFP410. Pin1 and Pin2 (high)
J9 DKEN Data de-skew enable control of TFP410. Pin1 and Pin2 (high)
J10 ISEL/RSTn
This is an active high I
2
C select signal of TFP410 used for enabling
the TFP410’s I
2
C interface. The I
2
C state machine can be reset by
bringing this signal low then back high. I
2
C is disable by the default
setting.
Pin2 and Pin3 (low)
J11 BSEL/SCL Input bus select or I
2
C clock input of TP410. Pin1 and Pin2 (high)
J12 DSEL/SDA DSEL or I
2
C bidirectional data line of TP410. Pin2 and Pin3 (low)
J13 PDN
This is an active low power down control of TP410. During power-
down mode, only the digital I/O buffers and I
2
C interface remain
active.
Pin1 and Pin2 (high)
J21 NS_VDD
The power of the DS90CR2 88 A is supported through this jumper’s
default setting. This jumper is used for disconnecting the
DS90CR2
88 A power and forcing its output to the high impedance
state. Note that the powerdown mode puts the DS90CR2 88 A out-
puts into low state instead of high impedance state.
Pin1 and Pin2