Motorola MVME2700 Series Servisní příručka stáhnout pdf (Strana 112)

3-14 Computer Group Literature Center Web Site

Functional Description

When restoring the board to service, execute the PPCBug SET command

(

set mmddyyhhmm) after installation to restart the oscillator and initialize

the clock.

Warning

Lithium batteries incorporate flammable materials such as lithium and

organic solvents. If lithium batteries are mistreated or handled incorrectly,

they may burst open and ignite, possible resulting in injury and/or fire.

When dealing with lithium batteries, carefully follow the precautions listed

below in order to prevent accidents.

❏ Do not short circuit.

❏ Do not disassemble, deform, or apply excessive pressure.

❏ Do not heat or incinerate.

❏ Do not apply solder directly.

❏ Do not use different models, or new and old batteries together.

❏ Do not charge.

❏ Always check proper polarity.

Programmable Timers

Among the resources available to the local processor are a number of

programmable timers. Timers are incorporated into the PIB controller and

the Z8536 CIO device as diagrammed in Figure 1-1 and Figure 3-1. They

can be programmed to generate periodic interrupts to the processor.

Interval Timers

The PCI-ISA Bridge controller has three built-in counters that serve as

programmable interval timers. The counters are grouped into one timer

unit, Timer 1, in the PIB controller. Each counter output has a specific

function:

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 ... 214 215

Žádné komentáře

Motorola MVME2700 Series Servisní příručka Strana 112