2–1

Chapter 2

22

2

Product Reference

Overview

This chapter contains the technical information require d to in stall and conf igure the
Little Board™/486e CPU. The information include s:
! Power Connector
! DRAM memory
! Serial Ports
! Bi-directional parallel port
! Floppy disk interface
! IDE hard disk interface (Compact Flash)
! Video Controller
! 32-pin byte-wide socket
! Ethernet local area network interface
! Utility connector (keyboard, PC speaker, reset button, external battery, PS/2 mouse)
! Watchdog timer
! Battery-backed clock
! PC/104-compatible expansion bus
! SETUP function

Interface Connector Summary

Refer to Figure 2–1 for the locations of the connecto rs (P1 A/B, P 2C/D, J 2 – J7, J11 – J16) and
configuration jumpers (W1 – W14). Table 2–1 summ arize s the u se o f the I /O co nnecto rs and Ta ble
2–2 summarizes use of the configuration jumpers. Each interface is described in its own section,
showing connector pin outs, signal definitions, required mating connectors, and configuration
jumper options.
Many of the connectors have a key pin removed. This allows you to block the corresponding cable
connector socket to help prevent improper assembly and possible board damage. Table 2–1
indicates which pins are key pins, and Figure 2–1 shows their locations.