參數(shù)資料
型號: 82845PE
廠商: Intel Corp.
英文描述: 82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)
中文描述: 82845GE圖形和內(nèi)存控制器中樞(GMCH)和82845PE內(nèi)存控制器中樞(MCH)
文件頁數(shù): 47/157頁
文件大小: 1407K
代理商: 82845PE
Intel
82845MP/82845MZ Chipset-Mobile (MCH-M)
250687-002
Datasheet
47
R
3.6.5.
CKSTR – Strength Control Register for CK Signal Group (CK /
CK#)
Address Offset:
33h
Default Value:
00h
Access:
Read Only, Read/Write
Size:
8 bits
This register controls the drive strength of the I/O buffers for the CK signal group, which includes both
the CK and CK# signals. This group has two possible loadings depending on the width of SDRAM
devices used in each Row of memory (x8 or x16). The proper strength can be independently programmed
for each configuration. The actual strength used for each signal is determined by the DRAM Width
register (offset 2Ch).
Bit
Descriptions
7
Reserved
6:4
CK x16 Strength Control: Sets drive strength as shown below:
000
= 0.75 X (default)
001
= 1.00 X
010
= 1.25 X
011
= 1.50 X
100
= 2.00 X
101
= 2.50 X
110
= 3.00 X
111
= 4.00 X
3
Reserved
2:0
CK x8 Strength Control: Sets drive strength as shown below:
000
= 0.75 X (default)
001
= 1.00 X
010
= 1.25 X
011
= 1.50 X
100
= 2.00 X
101
= 2.50 X
110
= 3.00 X
111
= 4.00 X
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