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 189
R
12.7. DDR SO-DIMM0 Connector
Table 74. DDR S0-DIMM0 Recommendations
Checklist Items Recommendations Reason/Impact
S#[0] Connect to SCS#[0] 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#[1] 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[0] 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[1] 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 the MCH-M SMA[12:0] pins
Connect to SO-DIMM1 with a 10
Ω ± 5% resistor
Refer to the reference
schematics.
RAS# Connect to the MCH-M SRAS# pin
Connect to SO-DIMM1 with a 10
Ω ± 5% resistor
Refer to the reference
schematics.
CAS# Connect to the MCH-M SCAS# pin
Connect to SO-DIMM1 with a 10
Ω ± 5% resistor
Refer to the reference
schematics.
WE# Connect to the MCH-M SWE# pin
Connect to SO-DIMM1 with a 10
Ω ± 5% resistor
Refer to the reference
schematics.
BA[1:0] Connect to the MCH-M SBS[1:0] pins
Connect to SO-DIMM1 with a 10
Ω ± 5% resistor
Refer to the reference
schematics.
DQ[63:0] Connect to MCH-M SDQ[63:0] signals through 22 ohm ± 5%
series resistors
Connect to a 56 ohm
± 5% parallel termination resistors tied
to Vtt (1.25V DDR Termination Voltage)
Refer to the reference
schematics.
CB[7:0] Connect to MCH-M SCB[7:0] signals through 22 ohm ± 5%
series resistors
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 MCH-M SDQS[8:0] signals through 22 ohm ± 5%
series resistors
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