Functional Description - TR-Electronic CD 75 Serie Gesamt-Bedienungsanleitung

5.2.2 Functional description


The manufacturer error block is executed with the rising edge of the REQ input.
The VALID, ERROR, ERRVAL, STATUS and TR_Manuf_Error outputs are
reset to 0. The BUSY output is set to 1.

The asynchronous read access to the measuring system is then executed. The
data of index 0xE00C are read.
The time for resetting the REQ input to 0 has no influence on the asynchronous
read access.

As soon as the read access is ended, the BUSY output is reset to 0 again.
Depending on whether the read access was successful and no other errors have
been detected, the VALID output is set to 1 or, in the case of error, the ERROR
output is set to 1.
If the read access was successful and a manufacturer-specific error has been
read, this is output at the TR_Manuf_Error output. Otherwise the
TR_Manuf_Error output has the value 0. Reading of a manufacturer-specific
error is also indicated via the STATUS output.
If the read access was unsuccessful, the error can be determined via the STATUS
output. In the case of a read error due to the RDREC block, the error value of the
block is also indicated at the ERRVAL output.
Printed in the Federal Republic of Germany
08/06/2021 TR-ECE-TI-DGB-0292 v02
 TR-Electronic GmbH 2016, All Rights Reserved
Page 143 of 159