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
192 Design Guide
R
Checklist Items Recommendations Reason/Impact
SA[2:0] Connect SA2 and SA1 to ground
Connect SA0 to V3.3S
Refer to the reference
schematics.
SDA
SCL
Connect to SMB_DATA and SMB_CLK with 10KΩ resistor
pull-ups to +V3.3Always
Refer to the reference
schematics.
VDD Connect to DDR 2.5 V Refer to the reference
schematics.
VDDQ Connect to DDR 2.5 V Refer to the reference
schematics.
VREF Connect to DDR Reference Voltage (Vref)
Connect to a 0.1-µF capacitor tied to ground
Refer to the reference
schematics.
VSS Connect to ground. Refer to the reference
schematics.
VDDSPD Serial EEPROM positive power supply (wired to a separate
pin at the connector, which supports operation from a
minimum of 2.3 V to a maximum of 3.6 V). This pin is
isolated from the Vdd/Vddq supply voltages.
Recommend connecting this to 3.3VAlways
Refer to the reference
schematics.
VDDID No Connect. Refer to the reference
schematics.
Table 76. DDR Extra
Checklist Items Recommendations Reason/Impact
RCVENOUT# Connect to MCH-M RCVENIN# pin
RCVENIN# Connect to MCH-M RCVENOUT# pin
VCCSM[38:0] Connect MCH-M VCCSM pins to 2.5 V
SDREF Connect to DDR Reference Voltage (Vref)
Connect to a 0.1-µF capacitor tied to ground