Batt (System Battery Connection); Example Connection At-Keyboard And Other Functions - Kontron MOPS/386A User Manual

BATT (System Battery Connection)

10.2.7.
This pin connects a system battery to all modules. The battery voltage must be higher
than 3.0V and lower than 4.0V. A 3.6V battery is recommended.
Because a capacitor supplies the RTC chip, you can disconnect the battery for at least
several seconds without losing time and setup information.
An external battery on this pin is only required for the update of the RTC. The CMOS
setup configuration data is stored in an onboard EEPROM and will not get lost, even
without a battery connected.

Example Connection AT-keyboard and Other Functions

10.2.8.
1 (Speaker)
2 (GND)
3 (/RESIN)
4 (/KBLOCK)
5 (KBDATA)
6 (KBCLK)
7 (GND)
8 (VCC)
9 (BATT)
Keyboard and Feature Interface
3
5
2
4
1
20
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MOPS/386A User's Guide