Specifications

Little Board/486i Technical Manual
1–4
ISO 9001 Manufacturing. Ampro is a certified ISO 9001 vendor.
EMC testing. Knowing that many embedded systems must qualify under regulatory compliance testing,
Ampro designs boards with careful attention to EMI issues. Boards are tested in standard enclosures to
ensure that they can pass C E mark testing.
Wide-range temperature testing. Ampro engineering qualifies its designs by extensive thermal and
voltage margin testing.
3.3V CPU for greater high temperature tolerance. The board uses the latest low-voltage CPU
technology to extend its temperature range and reduce cooling requirements.
Holes for tie-wraps for socketed components. Provision is made to tie down socketed components and
other attachments so that they are able to withstand high-vibration environments.
Shrouded latching headers for cables. Onboard shrouded headers make assembly easier and less error-
prone. Clips hold cables firmly to enhance reliability in high-vibration environments.
1.3 Little Board/486i SPECIFICATIONS
The following section provides technical specifications for the Little Board/486i.
1.3.1 CPU/Motherboard
! CPU: 3.3 V 80846 100 Mhz, 66 Mhz, or 133 Mhz. (133 Mhz may be jumpered for 100 Mhz.)
! System RAM:
− Sockets for one or two 72-pin SIMMs
− Supports up to 64M bytes total RAM
! Shadow RAM support provides fast system and video BIOS execution
! 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 extensions
1.3.2 Embedded-PC System Enhancements
! Two 32-pin byte-wide memory sockets:
− Usable with 32K to 1M byte EPROMs, 32K to 512K byte Flash EPROMs, 32K to 512K byte
SRAMs, or 32K to 512K byte NOVRAMs (Non-volatile RAMs)
− Onboard battery converts SRAM in one socket (S0) to NOVRAM