參數(shù)資料
型號(hào)： FW82815
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù)： 54/172頁
文件大?。?/td> 795K
代理商： FW82815
82815 GMCH
R
54
Datasheet
3.4.16.
DRP—DRAM Row Population Register (Device 0)
Address Offset:
Default Value:
Access:
Size:
52h
00h
Read/Write (Read-Only if D_LCK = 1)
8 bits
The GMCH supports 6 physical rows of DRAM in 3 DIMMs. The width of a row is 64 bits. The DRAM
Row Population Register defines the population of each side of each DIMM. Note that this entire register
becomes read-only when the D_LCK bit is set to 1. For D_LCK bit description, see SMRAM register
(Device 0, address offset 70h).
If the system memory interface is configured to run at 133 MHz, the system BIOS must use the DRP
register (offset 52h) along with the DRP2 register (offset 52h) to detect whether the memory
configuration exceeds 2 double-sided DIMMs or 3 single-sided DIMMs. If so, the system BIOS must
down-shift the clock generator to 100 MHz to guarantee electrical integrity and timings.
7
4
DIMM 1 Population
3
0
DIMM 0 Population
Bit
Description
7:4
DIMM 1 Population.
This field indicates the population of DIMM 1. (See table below)
3:0
DIMM 0 Population.
This field indicates the population of DIMM 0. (See table below)
Table 3. Supported System Memory DIMM Configurations
Register
Code
DIMM
Capacity
# of Devices /
DIMM
# of
Sides
DRAM
Tech.
Front Side
Population
Back Side
Population
Row
Bank Column
Count
Config
Count
Config
0
0
N/A
Empty
Empty
N/A
N/A
N/A
1
32 MB
16
DS
16 Mb
8 -
2 Mb
x 8
8 -
2 Mb
x 8
11
1
9
2
32 MB
4
SS
64 Mb
4 -
4 Mb x 16
12
2
8
3
48 MB
12
DS
64/16 Mb
4 -
4 Mb x 16
8 -
2 Mb
x 8
12
2/1
8
4
64 MB
8
DS
64 Mb
4 -
4 Mb x 16
4 -
4 Mb x 16
12
2
8
5
64 MB
8
SS
64 Mb
8 -
8 Mb
x 8
12
2
9
5
64 MB
4
SS
128 Mb
4 -
8 Mb x 16
12
2
9
6
96 MB
12
DS
64 Mb
8 -
8 Mb
x 8
4 -
4 Mb x 16
12
2
9/8
6
96 MB
8
DS
128/64 Mb
4 -
8 Mb x 16
4 -
4 Mb x 16
12
2
9/8
7
128 MB
16
DS
64 Mb
8 -
8 Mb
x 8
8 -
8 Mb
x 8
12
2
9
7
128 MB
8
DS
128 Mb
4 -
8 Mb x 16
4 -
8 Mb x 16
12
2
9
9
128 MB
8
SS
128 Mb
8 -
16 Mb x 8
12
2
10
A
128 MB
4
SS
256 Mb
4 -
16 Mb x 16
13
2
9
B
192 MB
12
DS
128 Mb
8 -
16 Mb x 8
4 -
8 Mb x 16
12
2
10/9
B
192 MB
16
DS
128/64 Mb
8 -
16 Mb x 8
8 -
8 Mb
x 8
12
2
10/9
C
256 MB
16
DS
128 Mb
8 -
16 Mb x 8
8 -
16 Mb x 8
12
2
10
D
256 MB
8
DS
256 Mb
4 -
16 Mb x 16
4 -
16 Mb x 16
13
2
9
E
256 MB
8
SS
256 Mb
8 -
32 Mb x 8
13
2
10
F
512 MB
16
DS
256 Mb
8 -
32 Mb x 8
8 -
32 Mb x 8
13
2
10
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