MiTAC 7521 PLUS/N service manual Hardware System

7521Plus / N N/B MAINTENANCE

The SiS900 is a single chip 10/100Mbps Fast Ethernet LAN solution, which fully integrates both the Media Access Controller (MAC) with PCI bus master interface and 802.3u compliant 10/100Mbps physical layer interface into a 128 pins PQFP, 0.35um process chip. It is targeted at low-cost, low-power, high volume desktop PC motherboards, mobile PC module, adapter cards, and embedded systems.

The Chrontel’s CH7005 digital PC to TV encoder is a standalone integrated circuit that provides a PC 99 compliant solution for TV output. It provides a universal digital input port to accept a pixel data stream from a compatible VGA controller (or equivalent) and converts this directly into NTSC or PAL TV format.

A full set of software drivers and utilities are available to allow advanced operating systems such as Windows 98 or Windows ME to take full advantage of the hardware capabilities. Features such as bus mastering IDE, Plug and Play, Advanced Power Management (APM) with application restart, software-controlled power shutdown. Following chapters will have more detail description for each individual sub-systems and functions.

1.2 Hardware System

1.2.1 System parts

Central Processing Unit : using Intel Pentium III or Celeron microprocessors in FC-PGA packaged.
Synthesizer : ICS9248-102.
SiS630S : CPU/PCI and CPU/AGP Bridge with memory controller/IDE/USB/PMU controller.
Super I/O Controller : NS PC97338VJG.
PCMCIA Interface Controlle : TI 1225.
Keyboard System : Hitachi H8 (3434F) universal keyboard controller.
3D Audio System : CRYSTAL CS4299 CODEC.
FIR port: HP HSDL-3600#007 FIR module.
FAX/MODEM : Software Modem (option).
LAN : SiS900
CH7005 : Digital PC to TV Encoder with Macrovision™	4