46 CR11*, CP11*, CT11* 6U CompactPCI® SBC
Publication No. HRMCR11 Rev. B.0
CHAPTER 7
Chapter Scope
Processor
Memory Controller
OMA Controller
Function Blocks
This
s
ect
i
on gives a brief overview of the software interfaces of onboard
devices on the CR! I CompactPCI Single Board Comp
u
ter
.
The Intel Core Duo and Core 2 Duo fa111ilie
s
provide high performance with
low power and features Enhanced Intel SpeedStep® technology which provides
the ability to dynamically adj
u
st the power and performance of the processor
based on CPU demand
.
This results in opti.
111
a
l
performance without
compromising the power perfor111ance of the CR! I.
The processor die is ther111ally protected by two thermal monitor feature
s
.
When reaching a maximum safe operating temperature the Ther111al Control
Circuit in the processor activate
s
a throttling feature and reduces the voltage
and frequency d
yn
amicall
y
.
If this feature is active the CR! I w
i
ll indicate it
with short clicks at the spea
k
er
.
In case of a catastrophic die overheating (above
1
25
°C) the CR! I switches off the processor core voltage
.
Recovery from this
catastrophic event can be done with a power off-on eye.le only.
The memory controller in the CR! I supports double data rate two synchronous
DRAMs
(
D
D
R2 S
D
RAM
)
with a data bus width of 128 bits+ ECC. One, two
or four banks are provided by the CR! I with a size of eit
h
er 512 Mbytes or I
G
B
yte
.
T
h
i
s results in a minin11.1111 memory size of 512 MByte and a 111aximu111
size of 4 GByte
.
When using memory confi
gur
ation with I GByte and higher
the interface u
s
es the full 128 bit bandwidth of both on chip DRAM charu1e
ls
.
In standard AT compatible PCs, as well as on the CR! I, the two DMA
controllers integrated on the board are internally cascaded
.
Both controllers are
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
