Ampro Corporation 486E Little Board/486e CPU Specifications, Embedded-PC System Enhancements

Chapter 3

Technical Specifications

Little Board™/486e CPU Specifications

The following section provides technical specifications for the Little Board™/486e CPU.

CPU/Motherboard

!CPU: 3.3 V 100 MHz or 133 MHz 80486

!System RAM:

￿Socket for 168-pin DIMM, FPM or EDO only

￿Supports up to 64M bytes total RAM

!15 interrupt channels (8237-equivalent)

!7 DMA channels (8259-equivalent)

!3 programmable counter/timers (8253-equivalent)

!Standard PC/AT keyboard port

!Standard PC speaker port with .1 watt output drive

!Battery-backed real-time clock and CMOS RAM

￿Up to 10 year battery life

￿Supports battery-free operation

!Award ROM BIOS with Ampro embedded-system extensions

Embedded-PC System Enhancements

!One 32-pin byte-wide memory socket:

￿Usable with 128K to 1M byte EPROMs, 128K to 512K byte FLASH EPROMs, 128K to 512K byte SRAMs, or 128K to 512K byte NOVRAMs (Non-volatile RAMs)

￿Onboard programming of 5 V FLASH EPROMs

￿Configurable as 64K or 128K byte window, addressed in the range of D0000h to EFFFFh

￿Supported by Ampro SSD Support Software and many third-party operating systems

!2K-bit configuration EEPROM:

￿Stores system SETUP parameters

￿Supports battery-free boot capability

￿512 bits are available for OEM use

!Watchdog Timer:

￿Utilizes the onboard real-time clock alarm function

￿Timeout triggers a hardware reset or non-maskable interrupt

!Powerfail NMI triggers when +5 Volt power drops below +4.65 Volts.

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