82845MP Datasheet, PDF (44/157 Pages) Intel Corporation – Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)

Intel^®82845MP/82845MZ Chipset-Mobile (MCH-M)
R
3.6.2.
DQCMDSTR – Strength Control Register for DQ and CMD
Signal Groups
Address Offset:
Default Value:
Access:
Size:
30h
00h
Read Only, Read/Write
8 bits
This register controls the drive strength of the I/O buffers for the DQ/DQS and CMD signal groups.
Bit
Descriptions
7
Reserved
6:4
CMD Strength Control (RAS#, CAS#, WE#, MA[12:0], BS[1:0])
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
DQ/DQS 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
44
Datasheet
250687-002