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2.17 RTC Circuit
In order to ensure the RTC is right and effective, the 3V button battery will continue to supply power to the system RTC after
the external power interrupted.
The battery model is CR1220; it is on the back of the board.
2.18 Extension Interface
E9 Mini PC provides 2.00mm pitch 2*25 double pins extension interfaces. The extension interfaces: 5V and 3.3V power supply,
2-channel USB Host, 17-channel GPIO with interrupt function, 2-channel CAN, 3-channel UART, 1-channel SPI, 1-channel
SDIO, 2-channel PWM.
Shenzhen Waveshare Electronics Co., Ltd.
www.waveshare.com
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