Functional Architecture
Intel® Server Board SE7520AF2 TPS
70
Revision
1.2
Intel order number C77866-003
3.4.10.4 Keyboard and Mouse
Dual stacked PS/2 ports, located on the back edge of the baseboard, are provided for keyboard
and mouse support. Either port can support a mouse or keyboard. Neither port will support hot
plugging, or connector insertion, while the system is turned on.
3.4.10.5 Wake-up
Control
The Super I/O contains functionality that allows various events to control the power-on and
power-off the system.
3.4.11 BIOS
Flash
An Intel
®
3 Volt A Boot Block 28F320C3 Flash memory component is used as the
BIOS flash device. The 28F320C3 is a high-performance 32-megabit memory component that
provides 2048Kb x 16 of BIOS and non-volatile storage space. The flash device is connected
through the X-bus from the SIO.
3.5 Configuration and Initialization
This section describes the initial programming environment including address maps for memory
and I/O, techniques and considerations for programming ASIC registers, and hardware option
configuration.
3.5.1 Memory
Space
At the highest level, the Intel “Nocona” processor address space is divided into four regions, as
shown in the figure below. Each region contains subregions, as described in following sections.
Attributes can be independently assigned to regions and subregions using the Intel® Server
Board SE7520AF2 registers. The Intel E7520 chipset supports 64 GB of host-addressable
memory space and 64KB+3 of host-addressable I/O space. The server board supports only the
main memory up to 16GB with DDR2-400.