Block diagram Brand name: Mobile Action Model Name: GT-120B
GT-120B Block Diagram ANT1 ANT2 GPS Antenna BT Antenna System Clock RTC Clock X2 Crystal 32MHz X1 Crystal 32.768K USB2.0 Full Speed CN1 Micro USB U6 U7 GPS Single chip U1 EUP8054 Battery Charge Bluetooth MPU chip UART nRF52820 MTK MT3337 U3 FM25Q16 Flash Memory X3 OSC 26MHz DC5V X4 Crystal 32.768K U4 S1 LED1 / LED2 BMA253 Push Buttom DISPLAY G-Sensor System Power 3.3V J1 Li-polymer Battery U1 / Q2 Battery Protection U2 RT9078-3.3V LDO 3.
