82845G Datasheet, PDF (138/193 Pages) Intel Corporation – Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)

Functional Description
Figure 4-2. Intel^® 845G Chipset-Based System Clocking Diagram
Processor
Low Voltage Differential Clocks
100/133 MHz
Low Voltage Differential Clocks
100/133 MHz
11
00
00
/
/
11
A
G
P
33
33
4
X
MM
HH
zz
Host
PLL
GMCH
Core
PLL
OR
DPLL
24 - 350
MHz
DDR
Differential Pairs
200/266 MHz DDR
or
133 MHz SDR
D
D
I
I
M
M
M
M
SDR
Differential Pairs
0
1
48 MHz DOT
CK- 408
Main PLL
400 MHz
66 MHz
66 MHz
Buffer
Section
/2
33 MHz
33 MHz
33 MHz
33 MHz
33 MHz
33 MHz
33 MHz
33 MHz
100/
133 MHz
ITP
14 MHz 48 MHz
OSC
PLL
33 MHz
66 MHz
48 MHz USB
14 MHz
48 MHz DOT
PCI Slot 0
PCI Slot 1
PCI Slot 2
PCI Dev 1
PCI Dev 2
PCI Dev 3
PCI Dev 4
PCI Dev 5
Intel^® ICH4
138
Intel^® 82845G/82845GL/82845GV GMCH Datasheet