System data words
RS 136 to RS 137
For self-test function
The system data words RS 136 to RS 137 are used for the self-test.
RS 136
Number of time slices (address: E F088H)
RS 137
Control bits (address: E F089H)
Using the control bits, the individual self-test functions can be
included or excluded (refer to Section 5.7).
Bit = ’1’: self-test function is included
Bit = ’0’: self-test function is excluded
High byte
Bit no. Assignment
15 Memory test
14 Not used
13 Test cycle time monitoring
12 Not used
11 Test BASP signal
10 Clock test
9 Not used
8 Not used
Low byte
7 Test address lines
6 Not used
5 Code test of the STEP 5 logic blocks in
the user memory
4 Not used
3 Not used
2 Code test of the system program
1 Not used
0 Not used
Table 8-19 Bits of RS 137 (control bits for self-test functions)
Bit Assignment of the System Data Words
CPU 948 Programming Guide
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