User Guide

8965 N/B Maintenance

 Programmable watch dog safe frequency

 Support I2C Index read/write and block read/write operations

 Uses external 14.318MHz crystal

1.2.3 PN800 Mobile North Bridge

The PN800 is a high performance, cost-effective and energy efficient UMA North Bridge with integrated

UniChrome Pro graphics / video controllers used for the implementation of mobile personal computer systems

based on 800 / 533 / 400 MHz FSB Intel Pentium 4 and Pentium M super-scalar processors. The complete mobile

chipset consists of the PN800 North Bridge (829 pin HSBGA) and the VT8235-CE V-Link South Bridge (539-pin

BGA). The PN800 integrates VIA’s PT800 system controller with high-performance UniChrome Pro 3D/2D

graphics accelerator plus flat panel, DVI monitor and TV out interfaces. The PN800 provides superior performance

between the CPU, DRAM, V-Link bus and internal AGP 8x graphics controller bus with pipelined, burst, and

concurrent operation. The VT8235-CE is a highly integrated peripheral controller which includes V-Link-to-PCI /

V-Link-to-LPC controllers, Ultra DMA IDE controller,USB2.0 host controller, 10/100Mb networking MAC, AC97,

and system power management controllers.

Host CPU Interface

The PN800 supports 800 / 533 / 400 MHz FSB Intel Pentium 4 and Pentium M super-scalar processors. It

implements a twelve level In-Order-Queue and supports Intel Hyper-Threading Technology to maximize system

performance for multi-threaded software applications. DBI and Pentium M bus protocol, as well as Intel SpeedStep

Technology, are supported which effectively reduce overall system power consumption.

MiTac Secret

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