Mobile Intel Pentium 4 Processor - M and Intel 845MP/MZ Chipset Platform Design Guide

Mobile Intel
®
Pentium
®
4 Processor-M and Intel
®
845MP/845MZ Chipset Platform
Design Guide 191
R
12.8. DDR SO-DIMM1 Connector
Table 75. DDR S0-DIMM0 Recommendations
Checklist Items Recommendations Reason/Impact
S#[0] Connect to SCS#[2] pin on MCH-M
Connect to a 56 ohm
± 5% parallel termination resistor tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
S#[1] Connect to SCS#[3] pin on MCH-M
Connect to a 56 ohm
± 5% parallel termination resistor tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
CKE[0] Connect to the MCH-M SCKE[2] pin
Connect to a 56 ohm
± 5% parallel termination resistor tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
CKE[1] Connect to the MCH-M SCKE[3] pin
Connect to a 56 ohm
± 5% parallel termination resistor tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
A[12:0] Connect to a 56 ohm ± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
RAS# Connect to a 56 ohm ± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
CAS# Connect to a 56 ohm ± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
WE# Connect to a 56 ohm ± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
BA[1:0] Connect to a 56 ohm ± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
DQ[63:0] Connect to the MCH-M SDQ[63:0] pins through 22 ohm ±
5% series resistors described in Sect. 6
Connect to a 56 ohm
± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage)
Refer to the reference
schematics.
CB[7:0] Connect to the MCH-M SCB[7:0] pins through 22 ohm ± 5%
series resistors described in Sect. 6
Connect to a 56 ohm
± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage)
For systems not
implementing ECC SO-
DIMMS CB[7:0] can be left
as no connect
DQS[8:0] Connect to the MCH-M SDQS[8:0] pins through 22 ohm ±
5% series resistors described in Section 6.
Connect to a 56 ohm
± 5% parallel termination resistors tied
to Vtt (1.25 V DDR Termination Voltage).
For systems not
implementing ECC, SO-
DIMMS DQS[8] can be left
as no connect.
DM[8:0] /
DQS[17:9]
Connect to Ground Refer to the reference
schematics.
CK[2:0] Connect to the MCH-M SCK[5:3] pins Refer to the reference
schematics.
CK#[2:0] Connect to the MCH-M SCK#[5:3] pins Refer to the reference
schematics.