AN3044

ECU level diagnostic

Doc ID 16196 Rev 2

9/20

2.4

Summary for ECU level diagnostic

The table below is summarizing the different possibilities for ECU level diagnostic.

Table 1.

ECU level diagnostic

Comments

SPC56x traceability info

from protected Flash

3 different options proposed with 2 not

requiring to distribute the Flash password:

either use specific diagnostic software either

use serial boot mode with a specific

sequence.

Connection to ECU

ECU connector

To have 1 pin for boot mode selection

and 1 pin for ECU reset without power off

Communication interface

UART, LIN, CAN, FlexRay

ECU software

for self tests #1

User software using application specific

diagnostic mode.

Diagnostic mode can be selected by

using GPIO.

Diagnostic can send traceability

information and run small ECU self tests

software.

ECU software

for self tests #2

Software uploaded in SPC56x RAM

Requires to have access to boot mode

from ECU connector.

Very flexible scheme for loading and

executing self tests but require specific

sequence for reading traceability

information.

Proposed tools #1

Third party tools (Vector, Etas, ..) that allows

connection to the selected communication

interface.

Proposed tools #2

ST Combox + CPUcommander software

Requires manual configuration of

CPUcommander (com. characteristics,

format of traceability info).