Datasheet

Intel
®
82845G/82845GL/82845GV GMCH Datasheet 181
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.
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.
Figure 9-1. Intel
®
845GL/845GV Chipset System Block Diagram
Intel
®
82801DB
I/O Controller Hub 4
(ICH4)
1.6 / 2.1 GB/s
PCI Bus
Intel
®
82845GL/
82845GV
Graphics and
Memory Controller
Hub (GMCH)
Hub
Interface
6 USB Ports,
3UHCI, 1 EHCI
UltraATA/100
AC '97 Codec(s)
(optional)
AC'97 2.3
LPC I/F
Super I/O
Keyboard,
Mouse, FD, PP,
SP, IR
FWH Flash
BIOS
PCI
Slots
1.06 GB/s
845GL/845GV
Chipset
PCI
Agent
GPIO
LAN Connect
4 IDE Devices
PCI133
SDRAM
System Memory
Interface
SMBus
SMBus
Devices
DDR-
SDRAM
Or
1.06 GB/s
2 Intel
®
DVO
Ports
VGA
Debug Port
System Bus
400 MHz,
533 MHz (82845GV only)
Processor