Intel Pentium 4 User Manual

Schematic Review Checklist
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 253
15.5 AGP Checklist
Checklist Items Recommendations Reason/Impact
G_FRAME#
G_IRDY#
G_TRDY#
G_DEVSEL#
G_STOP#
G_SERR#
G_PERR#
G_RBF#
G_PIPE#
G_REQ#
G_GNT#
G_PAR
AD_STB[0:1]
SB_STB
WBF#
• These signals require pull-up resistors
to V
DDQ
.
• Acceptable values are between 4 kΩ
and 16 k
Ω. The recommended value
is 8.2 k
Ω.
• V
DDQ
= 1.5 V for 1X, 2X and 4X
mode
• Pull up to V
DDQ
ensures that stable
values are maintained when agents
are not actively driving the bus.
• Refer to Section 7.1.9.
AD_STB#[0:1]
SB_STB#
• These signals require pull-down
resistors.
• Acceptable values are between 4 kΩ
and 16 k
Ω. The recommended value
is 8.2 k
Ω.
• Pull down to GND ensures that
stable values are maintained when
agents are not actively driving the
bus.
• Refer to Section 7.1.9.
INTA#
INTB#
• 8.2 kΩ pull-up resistors to 3.3 V
• Range is 4 kΩ – 16 kΩ
• These signals should be pulled up
only once (for both PCI and AGP).
They should be pulled to 3.3 V and
MUST NOT be pulled to 5 V.
• INTB# is for a two function device
and may not be seen with AGP
down
• Refer to Section 7.1.9 this
document.
VREFCG[B66]
VREFGC[A66]
G_REF[1:0]
• VREFCG should be tied to a resistor
divider near the AGP device.
• VREFGC should be a no connect.
• A 220 Ω – 330 Ω series resistor
should be connected from the voltage
divider network to the G_REF[1:0]
pins on the MCH.
• The V
REF
divider network should be
placed near the AGP interface to
achieve the common mode power
supply effect. A 0.1 µF decoupling
capacitor should be placed near the
G_REF[1:0
• Refer to Section 7.1.7.
TYPEDET# [A2] • Intel 850 chipset only supports 1.5 V
add-in card. Therefore, TYPEDET#
detection on the motherboard is not
required.
• Refer to Section 7.1.6.
PME# • Connect to PCI PME# • This is an open drain signal from
the AGP connector and does not
require pull-up resistor to VCC3_3 if
connected to ICH2.
3.3Vaux
(B24)
• Connect to 3.3V
SB
• May not be seen with AGP down

Intel Pentium 4 Specifications

General

Architecture	x86
Core Count	1
Microarchitecture	NetBurst
Manufacturer	Intel
Core Names	Willamette, Northwood, Prescott, Cedar Mill
Virtualization Technology	No
Release Date	November 20, 2000
Clock Speed	1.3 GHz to 3.8 GHz
FSB Speed	400 MHz to 1066 MHz
Socket	Socket 423, Socket 478, LGA 775
Introduced	2000
Product Line	Pentium
Front Side Bus	400 MHz to 1066 MHz
Hyper-Threading	Yes (Prescott and later)
64-bit Support	Yes (Prescott and later)
Instruction Set	MMX, SSE, SSE2, SSE3
Discontinued	2008
Process Technology	180 nm, 130 nm, 90 nm, 65 nm
L2 Cache	256 KB, 512 KB, 1 MB, 2 MB
Lithography	180 nm, 130 nm, 90 nm, 65 nm
L1 Cache	8 KB