4
ispMACH 4256V Breakout Board Evaluation Kit
The preprogrammed demonstration design is an up counter which is used to drive an LED array. The demo uses
the external 5 MHz SiTIME oscillator to run the counter. The 23-bit up counter advances each second. The output
of the counter is used to drive the LED array. The resulting light pattern will appear as an alternating pair of lit LEDs
per row.
Figure 2. Counter Demo Block Diagram
LED Array
ispMACH 4256V
Ext. 5 MHz osc.
23-
b
it Up co
u
nter
Run the Demonstration Design
NOTE: If you have already installed Lattice software tools, you can skip the following installation step.
WARNING: Do not connect the Breakout Board to your PC before you follow the driver installation procedure of
this section.
Communication with the Breakout Board with a PC via the USB connection cable will require the FTDI chip USB
hardware drivers contained in the
section. Loading these drivers enables the computer to
reliably recognize and program the Breakout Board. Drivers can be loaded as part of the installation of Lattice Dia-
mond
®
design software or Diamond Programmer or a stand-alone package.
To load the FTDI chip USB hardware drivers as part of the Lattice Diamond installation:
1.
Select
Programmer Drivers
in the Product Options of Lattice Diamond Setup.
2.
Select
FTDI Windows USB Driver
or
All Drivers
in the LSC Drivers Install/Uninstall dialog box..
3.
Click
Finish
to install the USB driver.
4.
Connect the USB cable from a USB port on your PC to the board’s USB mini-B socket (J2). After connection is
made, a green Power LED (D9) will light indicating the board is powered on.
5.
Red LEDs will light and start to flash according to the preprogrammed demonstration design.
See the
section of this guide if the board does not function as expected.
