RG82845M Intel, RG82845M Datasheet - Page 45

• Manufacturer Part Number: RG82845M
• Description: Chipset Memory Controller Hub Mobile
• Manufacturer: Intel

3.6.3.
250687-002
R
This register controls the drive strength of the I/O buffers for the CKE signal group. 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).
CKESTR – Strength Control Register for CKE Signal Group
Address Offset:
Default Value:
Access:
Size:
Bit
6:4
2:0
7
3
Reserved
Reserved.
CKE 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
CKE 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
31h
00h
Read Only, Read/Write
8 bits
Datasheet
Intel
Descriptions
®
82845MP/82845MZ Chipset-Mobile (MCH-M)
45