Table of Contents
Advertisement
R
8.1.4.
RAMDAC Routing Guidelines
Figure 63. GMCH RAMDAC Routing Guidelines with Docking Connector
1.5V
VCCDACA1 VCCDACA2
Red
DAC
Channel
Green
DAC
Channel
Blue
DAC
Channel
IREF
Rset
®
Intel
852GM Chipset Platform Design Guide
Place C1 and C2 as
C1
C2
close to package as
possible
37.5 Ω
1.5V
impedance
D
RED
C1
D
RED#
37.5 Ω
1.5V
impedance
D
Switch
GREEN
C1
D
GREEN#
37.5 Ω
1.5V
impedance
D
BLUE
Switch
C1
D
BLUE#
VSSDACA
Place ESD diodes to
minimize power rail
inductance – place C1 as
close to diodes as possible
FB
Motherboard
R1
C
Switch
FB
R1
C
FB
R1
C
FB
R1
C
FB
C
R1
FB
C
R1
Place components in
Close proximity to VGA
& Docking connectors
Integrated Graphics Display Port
75 Ω Routes
C
C
Pin 1 -
75 Ω
Red
Routes
Pin 2 -
Green
C
Pin 3 -
Blue
VGA
C
Connector
75 Ω
Red
Routes
Green
C
Blue
C
Docking
Connector
Do NOT route any high-
frequency signals in the
shaded area
131
Advertisement
Table of Contents
