101019
OPERATIONS MANUAL PPM-LX800-G
5
Rotational Disk Support
An industry standard 16-bit IDE interface is provided to support up to two hard
disks. An IDE activity LED,
D14
, provides visual status during IDE data transfers.
The IDE interface is provided via connector
J108
, which is an 80-pin high
density connector. WinSystems offers the cable
to simplify the
connection. The pinout for the connector and cable is listed in detail in the
cable
drawing
.
Real-Time Clock/Calendar
A real-time clock is used as the AT-compatible clock/calendar. It supports a number of
features including periodic and alarm interrupt capabilities. In addition to the time and
date keeping functions, the system configuration is kept in CMOS RAM contained within
the clock section.
Battery Backup
An optional external battery, connected at
J8
, supplies the PPM-LX800-G board with
standby power for the real-time clock and CMOS setup RAM. An extended temperature
lithium battery capable of backing up the PPM-LX800-G is available from WinSystems,
WinSystems’ Application Engineer for additional information.
A power supervisory circuit contains the voltage sensing circuit and an internal power
switch to route the battery or standby voltage to the circuits selected for backup. The
battery automatically switches ON when
VCC
drops below the battery voltage and back
OFF again when
VCC
returns to normal.
Enables Battery (default)
5-6
Disables Battery
5 6
J1
WARNING:
BAT-LTC-E-36-27-1
(or BAT-LTC-E-36-16-1 if applicable)
must be connected at J8. Improper connection may result in
explosive failure. It is possible for the battery to violently explode if
installed incorrectly. Please be careful to note correct connection at
location J8.
7 5 3 1
o o o o
o o o o
8 6 4 2