Technical, Pecifications, Chapter 3 – Ampro Corporation 486E User Manual
Page 105: Little board™/486 e cpu specifications

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Chapter 3
Technical
S
pecifications
Little Board™/486e CPU Specifications
The following section provides technical specifications for the Little Board™/486e CPU.
CPU/Motherboard
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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)
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7 DMA channels (8259-equivalent)
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3 programmable counter/timers (8253-equivalent)
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Standard PC/AT keyboard port
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Standard PC speaker port with .1 watt output drive
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Battery-backed real-time clock and CMOS RAM
Up to 10 year battery life
Supports battery-free operation
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Award ROM BIOS with Ampro embedded-system extensions
Embedded-PC System Enhancements
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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
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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
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Powerfail NMI triggers when +5 Volt power drops below +4.65 Volts.