SmartGPU2-LCD480X320Touch-Datasheet

SMART GPU 2 3.5” TOUCH

Datasheet

1.10 Typical RTC Real Time Clock connections:

The Smart GPU 2 processor has an embedded RTC Real Time Clock to support

full Time-Date calendar functions, also Data Logger applications that require a precise

timestamp.

The real-time clock is an independent timer that counts every second and keeps

information about Date(day, month, year) and Time(hours, minutes, seconds). The next

RTC Timer Functions enable full possibilities with the Smart GPU 2. User can create full

real time Graphic User Interfaces and Data-logger applications with clock-calendar

functions with the accuracy that only a RTC provides.

The RTC is internal and ready to run, an external crystal has been soldered to the

OSC32 external pads to enable full RTC support. To avoid the RTC lose time and date

data each time main VCC power is removed or shut down from the chip, a Standard 3V

coin backup battery or similar can be connected between the pads noted as VBat and

GND pin on the board, this way the RTC will continuously running conserving Time and

Date data even the Smart GPU 2 chip is power off.

The following circuit connections are recommended to achieve a good RTC

Crystal and Back-Up Battery connection.