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SAM9G45 [Summary]
6438IS–ATARM–12-Feb-13
8. System Controller
The System Controller is a set of peripherals that allows handling of key elements of the system, such as power, resets,
clocks, time, interrupts, watchdog, etc.
The System Controller User Interface also embeds the registers that configure the Matrix and a set of registers for the
chip configuration. The chip configuration registers configure the EBI chip select assignment and voltage range for
external memories.
8.1 System Controller Mapping
The System Controller’s peripherals are all mapped within the highest 16 KBytes of address space, between addresses
0xFFFF E800 and 0xFFFF FFFF.
However, all the registers of the System Controller are mapped on the top of the address space. All the registers of the
System Controller can be addressed from a single pointer by using the standard ARM instruction set, as the Load/Store
instruction have an indexing mode of ±4 KB.
Figure 8-1 on page 30 shows the System Controller block diagram.
Figure 7-1 on page 23 shows the mapping of the User Interfaces of the System Controller peripherals.
