AD8116-EB Analog Devices Inc, AD8116-EB Datasheet - Page 10

• Manufacturer Part Number: AD8116-EB
• Manufacturer: Analog Devices Inc

Specifications of AD8116-EB

• Lead Free Status / Rohs Status: Not Compliant

EVAL-AD8116EB
Controlling the Evaluation Board from a PC
The evaluation board includes Windows based control software
and a custom cable that connects the board’s digital interface
to the printer port of the PC. The wiring of this cable is shown
in Figure 9. The software requires Windows 3.1 or later to
operate. To install the software, insert the disk labeled “Disk #1
of 2” in the PC and run the file called SETUP.EXE. Additional
installation instructions will be given on-screen. Before begin-
ning installation, it is important to terminate any other Windows
applications that are running.
When you launch the crosspoint control software, you will be
asked to select the printer port you are using. Most modern PCs
have only one printer port, usually called LPT1; however, some
laptop computers use the PRN port.
UPDATE
DATA IN
EVALUATION BOARD
RESET
DGND
CLK
CE
D-SUB-25
Figure 9. Evaluation Board PC Connection Cable
2
3
4
5
6
25
CRIMP TERMINAL HOUSING
MOLEX 0.100" CENTER
TERMINAL HOUSING
1
6
MOLEX
3
1
4
5
2
6
SIGNAL
CE
RESET
UPDATE
DATA IN
CLK
DGND
D-SUB 25 PIN
(MALE)
14
25
PC
13
1
–10–
Figure 10 shows the main screen of the control software in its
initial reset state (all outputs off). Using the mouse, any input
can be connected with one or more outputs by simply clicking
on the appropriate radio buttons in the 16 ¥ 16 on-screen
array. Each time a button is clicked on, the software automati-
cally sends and latches the required 80-bit data stream to the
evaluation board. An output can be turned off by clicking the
appropriate button in the Off column. To turn off all outputs,
click RESET.
The software offers volatile and nonvolatile storage of configura-
tions. For volatile storage, up to two configurations can be stored
and recalled using the Memory 1 and Memory 2 buffers. These
function in an identical fashion to the memory on a pocket
calculator. For nonvolatile storage of a configuration, the Save
Setup and Load Setup functions can be used. This stores the
configuration as a data file on disk.
Overshoot on PC Printer Ports’ Data Lines
The data lines on some printer ports have excessive overshoot.
Overshoot on the pin that is used as the serial clock (Pin 6 on
the D-Sub-25 connector) can cause communication problems.
This overshoot can be eliminated by connecting a capacitor
from the CLK line on the evaluation board to ground. A pad
has been provided on the solder-side of the evaluation board to
allow this capacitor to be soldered into place. Depending upon
the overshoot from the printer port, this capacitor may need to
be as large as 0.01 mF.
REV. 0