User Guide

4
1 – Configuration Options
AHB Bus Matrix Master/Slave Access Configuration
Note that the master/slave access controls are restricted to those devices offering the Advanced Security
Features. For devices offering baseline security only, all programmable accesses are granted and cannot
be changed. The controls are grayed out.
The Master/Slave configuration tab defines how masters and slaves communicate and whether it also
has write access when a master has read access. The AHB Bus Matrix can be configured to restrict
those accesses.
The master/slave access is defined in the matrix as follows:
• R: Only Read access is available when Read is checked
• W: Only Write access is available when Write is checked.
• RW: Both Read and Write access are available when both Read and Write are checked
Whenever you restrict a master/slave access by un-checking the Read or Write access for a particular
group of masters (masters are organized in three groups with respect to access configuration) the actual
access is shown in the matrix.
eNVM blocks have special sectors that can be write protected. The number of special sectors depends
on the device selected. The size of each sector is 4KB and the address range for each special sector is
shown in blue in the GUI. Check the Use as ROM option to write protect these eNVM regions. The eNVM
special sectors are hidden in the matrix when you open the configurator, and you must click the '+' sign to
show these special sectors (
Figure 1-1).
Figure 1-1 • Security Configurator with eNVM Special Sectors