PCM-C418/Configuration
v1.0
www.winsystems.com
Page 19
6.8.2 BAT1 - External, Battery Backup
An optional external battery, connected at
BAT1
, supplies the PCM-C418 board with
standby power for the real-time clock, SRAM, and CMOS setup RAM. An extended
temperature lithium battery capable of backing up these functions on the PCM-C418 is
available from WinSystems, part number BAT-LTC-E-36-16-1 (or BAT-LTC-E-36-27-1 if
applicable).
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 the V
CC
of the systems drops below the battery
voltage and back OFF again when V
CC
returns to normal.
Layout and Pin Reference
Connectors
•
PCB connector: Molex 22-12-2034 (J8)
•
Mating connector: Molex 22-01-3037 (housing)
•
Mating connector: Molex 08-55-0102 (crimp)
WinSystems battery BAT-LTC-E-36-16-1 (or BAT-LTC-E-36-27-1) simplifies the
connections to the board.
6.8.3 BZ1 - Buzzer
An on-board piezo buzzer,
BZ1
, is available for sound generation.
BAT1
Pin
Name
1
GND
2
+VBAT
3
NC
BAT-LTC-E-36-27-1
BAT-LTC-E-36-16-1
