AT91SAM9G45 datasheet(28/54 Pages) ATMEL

28 / 54 page

6438CS–ATARM–13-Oct-09

AT91SAM9G45

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 29 shows the System Controller block diagram.

Figure 7-1 on page 21 shows the mapping of the User Interfaces of the System Controller

peripherals.

AT91SAM9G45 Datasheet(PDF) 28 Page - ATMEL Corporation