Technical data

SCC - Serial Communication Controller (Z85230) Tests

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ILPBCK - Internal Loopback

Command Input

PPCx-Diag>SCC ILPBCK

Description

This test transmits 256 characters at 38400 baud. The data is received and

compared. If any protocol errors are created or the data is not correct when

received, the test failed.

Note Because of the design of the Z85230, when internal loopback

testing is performed, data is still transmitted out of the device on

the TxD line. This may cause problems with terminals, modem,

printers, and any other device attached.

Response/Messages

After the command has been issued, the following line is printed:

SCC ILPBCK: Internal Loopback........... Running --->

If all parts of the test are completed correctly, then the test passes:

SCC ILPBCK: Internal Loopback......Running ---> PASSED

If any part of the test fails, then the display appears as follows:

SCC ILPBCK: Internal Loopback......Running ---> FAILED

SCC/ILPBCK Test Failure Data:

(error message)

Refer to the section SCC Error Messages for a list of the error messages

and their meaning.