User`s manual

Issued Date
Revision Status
Title
Page No.
21 / 44
V2.2
2009-2-20
IDP2310UX
(AL23PUX)
2.2.2 Communication Data Format
Byte# 0 1 2,3,4 5 6 7,ect 7+LEN
ATTN ADDR CMD LEN IHCHK DATA IDCHK
Attention (ATTN)
This byte is used to identify a start of message. It can be one of 3 values:
ATTN Description
0x07
0x06
0x15
Command (ASCII BELL)
Acknowledge (ASCII ACK)
Negative Acknowledge (ASCII NAK)
A device shall send a command using the 0x07 Attention Code. The display will respond to the
Command with either an ACK if the command completed successfully, or a NAK if the command
failed.
Address (ADDR)
This byte is used to specify a particular display to receive a command and to identify the display
responding (ACK or NAK) to a command. All displays will support the broadcast address.
The display will meet all functional requirements without individual Display addressing
The Address field shall have the following values:
ADDR Description
0xFF Broadcast – Addressed to all display
0x00 to 0x0f Address of a specific display
(max of 16 Display)