ITX-P-3800/Configuration
v1.0
www.winsystems.com
Page 13
7.3 Real-time Clock/Calendar
A real-time clock is used as the AT-compatible clock/calendar. In addition to the time
and date-keeping functions, the system configuration is kept in CMOS RAM contained
within the clock section. A battery must be enabled for the real-time clock to retain time
and date during a power down.
WinSystems has software available for manipulating the CMOS RTC from a high-level
application.
7.4 Connectors
7.4.1 PWR - DC Power Input
Layout and Pin Reference
PWR: DC 9V~36V 1x4 pin (2.0 mm) connector
Matching Connectors
•
JST B4B-PH-KL
Cable Housing
•
JST PHR-4
7.4.2 BATT - CMOS Battery Connector
BATT: Battery uses Li 3V / 40 mAh (CR1220)
The RTC consumes 2.7 uA when the power adapter is NOT connected.
The RTC consumes 0.1 uA when the power adapter is connected.
Pin
Description
2,3
DC-IN (12V)
1,4
GND
pin 1