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OLED Logic Boards Users Manual
7850 East Gelding Drive ? Scottsdale, AZ 85260-3420
8. Key Terms & Definitions
OLED Module
Host
Controller
Logic Board
Byte
Nibble/Hex digit
ASCII
Communication
NKK Switches’ OLED SmartSwitches and SmartDisplays.
Any computer, terminal, or other device that can communicate over the
RS232 line.
A PCB assembly that controls one or more logic boards and the switches
associated with them. It communicates with a host over the RS232 line.
A PCB assembly with “glue logic” for mounting switches. It is controlled by a
controller.
An eight bit hex value ranging from 00H to FFH (Decimal 0 to 255). The bit
format of a byte is: (B7 B6 B5 B4 B3 B2 B1 B0) where B7 is most significant
and bit B0 is least significant bit.
A four bit value ranging from 0H to FH. A byte consists of two nibbles.
A byte value representing a symbol.
There are two formats to transmit a byte:
Format
1. Hex format - A hex byte is transmitted without any change to it. [ xxH ] will
be used to denote this.
All commands and some data are sent by using this format.
2. ASCII HEX format - Each nibble of the byte is converted to ASCII code
and sent as a byte. [ xxAH ] will be used to denote this.
For example, the hex byte 5AH is transmitted in two bytes, 35H and 41H .
The ASCII value for 5 is 35H and the ASCII value for A is 41H .
All addresses and most data are sent using this format.
Address
A two byte value ranging from 0001H to FFFFH representing the 65536
memory locations for pictures and attributes on microSD flash.
OLED Logic Boards Users Manual B.doc
Toll Free 1.877.2BUYNKK (877.228.9655) ? Phone 480.991.0942 ? Fax 480.998.1435
www.nkkswitches.com ? Email engineering@nkkswitches.com
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