RG82845G S L66F Intel, RG82845G S L66F Datasheet - Page 108

• Manufacturer Part Number: RG82845G S L66F
• Manufacturer: Intel

Specifications of RG82845G S L66F

• Lead Free Status / RoHS Status: Not Compliant

Functional Description
4.2.3
4.2.3.1
108
Table 4-2. Supported DDR DIMM Configurations
Table 4-3. Supported SDR DIMM Configurations
Note: Mixed mode or uneven, double-sided SDR SDRAM DIMMs are not supported.
Configuration Mechanism for DIMMs
Memory Organization and Configuration
In the following discussion the term “row” refers to a set of memory devices that are
simultaneously selected by a chip select signal. The GMCH supports a maximum of 4 rows of
memory. For the purposes of this discussion, a “side” of a DIMM is equivalent to a “row” of
SDRAM devices.
The memory bank address lines and the address lines allow the GMCH to support 64-bit wide x8
and x16 DIMMs using 64-Mb, 128-Mb, 256-Mb, and 512-Mb SDRAM technology.
For the DDR SDRAM interface,
that the GMCH supports configurations defined in the JEDEC DDR DIMM specification only
(A,B,C). Non-JEDEC standard DIMMs (e.g., double-sided x16 DDR SDRAM DIMMs) are not
supported. For more information on DIMM configurations, refer to the JEDEC DDR DIMM
specification.
For the SDR SDRAM interface,
Detection of the type of SDRAM installed on the DIMM is supported via Serial Presence Detect
(SPD) mechanism as defined in the JEDEC DIMM specification. This uses the SCL, SDA, and
SA[2:0] pins on the DIMMs to detect the type and size of the installed DIMMs. No special
programmable modes are provided on the GMCH for detecting the size and type of memory
installed. Type and size detection must be done via the serial presence detection pins and is
required to configure the GMCH.
Device
Width
Single /
Double
184 pin
DDR
DIMMs
Device
Width
Single /
Double
168 pin
SDR
DIMMs
Density
Density
64 MB /
128 MB
64 MB /
128 MB
SS/DS
SS/DS
X8
X8
64 Mbit
64 Mbit
32 MB /
32 MB /
SS/DS
SS/DS
64 MB
X16
X16
NA
Table 4-3
Table 4-2
128 MB /
128 MB /
256 MB
256 MB
SS/DS
SS/DS
X8
X8
128 Mbit
128 Mbit
lists the supported SDR DIMM configurations.
lists the supported DDR DIMM configurations. Note
64 MB /
64 MB /
128 MB
SS/DS
SS/DS
Intel
X16
X16
NA
®
82845G/82845GL/82845GV GMCH Datasheet
256 MB /
256 MB /
512 MB
512 MB
SS/DS
SS/DS
X8
X8
256 Mbit
256 Mbit
128 MB /
128 MB /
256 MB
SS/DS
SS/DS
X16
X16
NA
512 MB /
1024 MB
512 MB /
1024 MB
SS/DS
SS/DS
X8
X8
512 Mbit
512 Mbit
256 MB /
256 MB/
512 MB
SS/DS
SS/DS
X16
X16
NA