82C836A-16 查看數據表（PDF） - Unspecified

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82C836A-16

Single-Chip 386sx AT

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Section 1

82C836 CHIPSet Introduction

The 82C836 (also known as SCATsx) is a VLSI device incorporating the motherboard

logic required to build a low-cost, highly-integrated, IBM PC/AT-compatible computer.

It is designed to be used in conjunction with other Chips and Technologies controllers

such as the 82C45X VGA Controller and the 82C710 Integrated Floppy Disk and

Multifunction Controller. When used with these devices, the 82C836 acts as the heart

of a highly integrated system significantly reducing motherboard size, component count,

and the need for many I/O channel slots.

Featu res

The 82C836 provides the following features:

• 80386sx control logic and clocks to

support CPU speeds of up to 25MHz

with zero (or one) wait states

• A 146818-compatible Real Time Clock

with 114 bytes of CMOS RAM

• Two 8237-compatible DMA controllers

• Two 8259-compatible interrupt

controllers

• An 8254-compatible programmable

interval timer

• An 82284-compatible clock generation

and READY interface

• An 82288-compatible bus controller

• A DRAM refresh controller

• Power management features

• A DRAM controller that supports up to

16 MB of DRAM using 256kB, 1MB

or 4MB DRAMs

• A memory controller that provides

shadow RAM and support of either

8-bit or 16-bit BIOS ROM

• Support for fast local cache RAM via

external cache controller

• Four EMS page registers (LIM EMS

4.0 and 3.2 compatible)

• Interface logic for an 80387sx numeric

coprocessor

• Interface logic for an 8042 keyboard

controller

• Fast GATEA20 and fast CPU reset logic

• Compact packaging in a single 160-pin

plastic flat pack (160 PFP).

Chips and Technologies, Inc.

PRELIMINARY

Revision 3.0 1 -1

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