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IS-Dev Kit-2 Users Manual
7850 East Gelding Drive ? Scottsdale, AZ 85260-3420
3. Overview
The IS-Dev Kit-1 has a flash EEPROM that can hold up to 255 images and attributes. The EEPROM is
rated for 100,000 write cycle.
These images and Attributes can be downloaded to the IS-Dev Kit-1 via RS232 communication.
The IS-Dev Kit-1 has internal RAM to hold the data for two images and attributes. These data are used
to refresh the LCD displays and backlighting.
Upon switch presses, timer expired or command from host the data can be read from any location of
EEPROM to internal RAM.
Host also can change the data on the internal RAM directly.
The switch activity and timer expires are reported via RS232.
Power-Up (Steps 1,2,3)
Upon power-up or reset, controller performs the following steps:
Step 1: Check if the RAM has been programmed. Compare the check string to EEPROM string.
A. If the strings are not the same, the EEPRM is virgin and its data is not acceptable. Step 2 will be
executed. (first time)
B. If the strings are the same, the data from RAM is acceptable. Step 2 is omitted and Step 3 is
executed.
Step 2: Write all the default initialize values to EEPROM as follows:
A. Put “LED DOWN” as the image for location one.
B. Put “LED UP” as the image for location two.
C. Put "Blank Font Memory" as the image for location three.
D. Put LED #1 backlighting on for location 1, 2 and 3.
E. Put “00H 00H 03H 03H 10H 10H” as attribute for location #1.
F. Put “00H 00H 00H 00H 00H 00H” as attribute for location #2 and #3.
G. Write the virgin check string.
Step 3
A.
B.
Initialize and load the data from location 1 and 2 of EEPROM to internal RAM for switch #1
and #2 respectfully.
initialize UART.
IS-Dev Kit-2 Users Manual A.doc
Toll Free 1.877.2BUYNKK (877.228.9655) ? Phone 480.991.0942 ? Fax 480.998.1435
www.nkkswitches.com ? Email engineering@nkkswitches.com
Page 7 of 15
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