AU80610004392AAS LBLA Intel, AU80610004392AAS LBLA Datasheet - Page 27

• Manufacturer Part Number: AU80610004392AAS LBLA
• Description: MPU, ATOM PRO, DUALCORE, D510, FC-BGA8
• Manufacturer: Intel
• Series: ATOM - D500r

Specifications of AU80610004392AAS LBLA

• Core Size: 64bit
• Cpu Speed: 1.66GHz
• Digital Ic Case Style: BGA
• No. Of Pins: 559
• Operating Temperature Range: 0°C To +100°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Processor Configuration Registers
1.4
Datasheet
Some of the CPU registers described in this section contain reserved bits. These bits
are labeled "Reserved”. Software must deal correctly with fields that are reserved. On
reads, software must use appropriate masks to extract the defined bits and not rely
on reserved bits being any particular value. On writes, software must ensure that the
values of reserved bit positions are preserved. That is, the values of reserved bit
positions must first be read, merged with the new values for other bit positions and
then written back. Note the software does not need to perform read, merge, write
operation for the configuration address register.
In addition to reserved bits within a register, CPU contains address locations in the
configuration space of the Host Bridge entity that are marked either "Reserved" or
“Intel Reserved”. The CPU responds to accesses to “Reserved” address locations by
completing the host cycle. When a “Reserved” register location is read, a zero value is
returned. (“Reserved” registers can be 8-, 16-, or 32-bit in size). Writes to “Reserved”
registers have no effect on the CPU. Registers that are marked as “Intel Reserved”
must not be modified by system software. Writes to “Intel Reserved” registers may
cause system failure. Reads to “Intel Reserved” registers may return a non-zero
value.
Upon a Full Reset, CPU sets all of its internal configuration registers to predetermined
default states. Some register values at reset are determined by external strapping
options, or the states of poly-silicon fuses. The default state represents the minimum
functionality feature set required to successfully bring up the system. Hence, it does
not represent the optimal system configuration. It is the responsibility of the system
initialization software (usually BIOS) to properly determine the DRAM configurations,
operating parameters and optional system features that are applicable, and to
program the CPU registers accordingly.
I/O Mapped Registers
The processor contains two registers that reside in the processor I/O address space −
the Configuration Address (CONFIG_ADDRESS) Register and the Configuration Data
(CONFIG_DATA) Register. The Configuration Address Register enables/disables the
configuration space and determines what portion of configuration space is visible
through the Configuration Data window.
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