Chapter 2 Product Overview
6 Reference Manual CoreModule 420
Product Description
The CoreModule 420 SBC is an exceptionally high integration, high-performance, 486-based PC
compatible system in the PC/104 form factor. This rugged and high quality single board system contains
all the component subsystems of a PC/AT motherboard plus the equivalent of several PC/AT expansion
boards.
In addition, the CoreModule 420 SBC includes a comprehensive set of system extensions and
enhancements that are specifically designed for embedded systems. These enhancements ensure fail-
safe embedded system operation, such as, a watchdog timer. It is designed to meet the size, power
consumption, temperature range, quality, and reliability demands of embedded applications. The
CoreModule 420 requires a single +5V power source.
The CoreModule 420 SBC is particularly well suited to either embedded or portable applications. Its
flexibility makes system design quick and easy. It can be stacked with Ampro MiniModules or other
PC/104-compliant expansion, or it can be used as the computing engine in a fully customized
application.

Module Features

•CPU
♦Supports 133MHz x86 based STPC ATLAS microprocessor
♦Fully PC compatible architecture
♦8kB Unified Instruction and Data Cache
♦Parallel Processing Integrated Floating Point Unit
♦Low Power and System Management Modes
•Memory
♦64MB standard SDRAM (soldered on the board)
♦100MHz Clock Speed
♦32-pin bytewide memory socket
•Supports a DiskOnChip® device
♦1MB Flash memory
•Stores system BIOS
•Stores system Setup parameters and manufacturing information
•Supports battery-free boot capability
•768kB available for OEM use
•PC/104 Bus Interface
♦Clock speeds up to 8.25MHz
•IDE Interface
♦Supports two enhanced IDE devices
♦Fast ATA-capable interface supports high-speed PIO modes
(PIO modes 0 to 4)
♦Supports ATAPI and DVD peripherals
♦Supports IDE native and ATA compatibility modes