AN3018

Self tests for SPC564Ax digital peripherals

Doc ID 16081 Rev 2

17/24

4.7.1

Interrupt controller logic check

Principle: the interrupt controller has a register to store the base address of the interrupt

vectors. The interrupt controller logic can be checked by defining a specific interrupt table for

the self tests. Software configurable interrupt sources can then be used to generate an

interrupt request. Nesting and priority management can be checked by enabling those

software configurable sources during selected interrupt routines.

Result: self test software dependent.

Resource availability: the interrupt controller is not available during this test.

Note:

As interrupt controller is checked using software based tests, more complex self tests can

be generated if required.

4.8

FlexCAN self tests

FlexCAN module has a loop back mode. This mode can be used to implement a self test.

This test will exercise the protocol engine of the FlexCAN.

4.8.1

FlexCAN check

Principle: use the loop back mode of FlexCAN module to send and receive data without

sending it over the CAN network.

Result: transmitted message is received by FlexCAN and the content of the message

(message ID, message payload) can be compared to known value(s).

Resource availability: FlexCAN is not available during this test.

4.9

eSCI self tests

A loop back mode is available.

4.9.1

eSCI loop back

Principle: eSCI can be put in loop back mode by setting bit “LOOPS” and clearing bit

“RSRC” of register SCICR1. In loop back mode, the eSCI treats its own transmitted

messages as received messages.

Result: transmitted message is received by eSCI and the content of the message can be

compared to known value(s).

Resource availability: eSCI is not available during this test.

4.10

eMIOS self tests

eMIOS module generates real time input output events, such as, counting, capture,

compare. This module can be checked using the eTPU.

4.10.1

eMIOS check

Principle: use the eTPU to capture the characteristics of some eMIOS channels.