Interpreters Document


Typical Interpreter Line: (all Action and Goto fields are hex numbers)



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dps Interpreters

Typical Interpreter Line: (all Action and Goto fields are hex numbers) 
Step 
Op-Code 
Action Fields
Goto Fields 
01 
84 
01 0A 78 00 
C3 02 FF 39 00 00 00 00 00 00 
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Page
145 
90 Op-Code: SR 36 to Transfer a Routine to ECU 
Supported By:
KWP2000 Interpreter 2
 
 
Description: 
 
The 90 Op-Code is used to build a service request 36 for downloading a reprogramming control routine to an 
ECU. The number of data bytes to include in each request is retrieved from the Utility File header. Depending 
on the ECU being programmed this Op-Code may need to be preceded by a service request 34 (see Op-Code 
34 ). 
The 90 Op-Code uses the global target and source byte for all requests. If a target and source byte other than 
the global target and source byte needs to be used, the Interpreter instructions should contain a 01 Op-Code 
prior to this Op-Code. 
Action Fields: 
AC0: Routine number to download
AC1: $00 - Not used
AC2: $00 - Not used
AC3: Exceptions: 
$00 - Use address from the routine in the Transfer Data Request 
(4 bytes)
$01 - Do not include any address information in the Transfer Data Request 
$40 - Send a RequestDownload (use global memory address) before and a 
RequestTransferExit after each Transfer Data Request. Use address from the routine 
in the Transfer Data Service Request 
(4 bytes)
$41 - Send a RequestDownload (use global memory address) before and a 
RequestTransferExit after each Transfer Data Request. Do not include any address 
information in the Transfer Data Service Request 
4 byte naming convention = High, MidHigh, MidLow, Low 
Pseudo Code: 
XX 90 AC0 AC1 AC2 AC3 G0-G1 G2-G3 G4-G5 G6-G7 G8-G9 
Find the routine indicated by value AC0
Use KWP2000 Normal Response processing
Build Transfer Data Request as indicated below 

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