82845G Datasheet, PDF (181/193 Pages) Intel Corporation – Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)

Intel^® 82845GL/82845GV GMCH
Intel^® 82845GL/82845GV GMCH
9
Chapter 1 through Chapter 8 of this datasheet described the 82845G component. The first eight
chapters also apply to the 82845GL/82845GV with the differences noted in this chapter. This
chapter describes the differences between the 82845G and 82845GL/82845GV components.
Figure 9-1 is a system block diagram of an 845GL/845GV chipset-based system.
The information in this chapter applies to both the 82845GL and 82845GV components, unless
otherwise noted. Also, unless otherwise noted in this chapter, GMCH applies to both the 82845GL
and 82845GV components.
Figure 9-1. Intel^® 845GL/845GV Chipset System Block Diagram
Processor
VGA
845GL/845GV
Chipset
System Bus
400 MHz,
533 MHz (82845GV only)
2 Intel^® DVO 1.06 GB/s
Ports
Intel^® 82845GL/
82845GV
Graphics and
Memory Controller
Hub (GMCH)
System Memory
Interface
DDR-
SDRAM
Or
PCI133
SDRAM
1.6 / 2.1 GB/s
1.06 GB/s
4 IDE Devices
UltraATA/100
6 USB Ports,
3UHCI, 1 EHCI
AC '97 Codec(s) AC'97 2.3
(optional)
Hub
Interface
Intel^® 82801DB
I/O Controller Hub 4
(ICH4)
PCI Bus
PCI
Slots
PCI
Agent
LAN Connect
Debug Port
GPIO
LPC I/F
Super I/O
SMBus
SMBus
Devices
Keyboard,
Mouse, FD, PP,
SP, IR
FWH Flash
BIOS
9.1
Processor System Bus (PSB) Frequency
82845GL: The 82845GL GMCH supports PSB frequency of 400 MHz (100 MHz bus clock) only.
References in the main body of this datasheet to a PSB frequency of 533 MHz are not applicable to
the 82845GL.
82845GV: The 82845GV GMCH supports Processor System Bus (PSB) frequencies of 400 MHz
(100 MHz bus clock) and 533 MHz (133 MHz bus clock). This is the same as the 82845G.
Intel^® 82845G/82845GL/82845GV GMCH Datasheet
181