Interpreters Document



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dps Interpreters

Pseudo Code: 
XX A0 AC0 AC1 AC2 AC3 G0-G1 G2-G3 G4-G5 G6-G7 G8-G9 
Build Request High Speed message as indicated in the table below 
Request 
Byte
Value 
Byte Description 

6C 
Format and type

AC0 
Target device ID 

## 
Global source ID. 

A0 
Request download message mode

CS 
1 byte message checksum (handled by the system) 
Send Tester Present message to all devices (0xFE) 
Send Mode A0 message and receive response 
Goto Class 2 Response processing 
If No response was received 
Goto step G1 
Else 
If AC3 = 00 
Set the “response code” to response message byte 5 
If the “response code” (response message byte 5) is equal to 0xBB 
Set the “response code” to 0xAA 
Endif 
Else
Set the “response code” to response message byte 4 
Endif 
Look for “response code” in the goto fields
If the “response code” is found 
Goto appropriate step
Else 
Goto step indicated by „FF‟ goto field 
Endif 
Typical Interpreter Line: 
Step 
Op-Code 
Action Fields
Goto Fields 
02 
A0 
10 00 00 00 
AA 03 FF 99 00 00 00 00 00 00 
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Page
93 
A1 Op-Code: Begin High Speed Communications - Mode A1
 
Supported By:
Class 2 Interpreter 1
 
 
Description: 
The A1 Op-Code builds a standard mode A1 message to begin high-speed communications. After sending the 
request for high-speed communications the tool will delay approximately one second to ensure high speed 
communications has started.
This Op-Code will not check for a response being received from the request (none expected).
Action Fields: 
AC0: 
Target Device ID
AC1: 
00 - Not Used
AC2: 
00 - Not Used 
AC3: 
00 - Not Used

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