Mobile phone module and SIM card peripheral circuit diagram Q2403A GSM / GPRS module supports dual-band EGSM / GPRS 900MHz / 1800MHz mode, supports AT commands, and has complete short message functions. The Q2403A module has a 60-pin universal interface, which is easy to integrate into application products; it has a 3V SIM card interface for SIM card confirmation, power supply, clock, reset, and I / O, including SIMVCC, SIMRST, SIMDATA, SIMCLK, and SIMPRES. In addition, the module provides a 6-wire serial communication interface that conforms to the V24 protocol, including TX, RX, RTS, CTS, DTR, and DSR; it also provides DCD and RI signal interfaces, power-on signal PowerON / OFF, and reset signal RST. The normal operation of the module requires two power supplies. Among them, VBATT is provided to the RF part, the voltage range is 3.3V ~ 4.5V, and the maximum power is 2 W; VDD is provided to the baseband part, the voltage range is 3.1V ~ 4.5V, and the maximum power is 0.5W. Figure 4 shows the peripheral circuit design of the mobile phone module and SIM card. Photovoltaic Module,Pv Module,Solar Panel Module,Conventional Mono Solar Module Jiangxi Huayang New Energy Co.,Ltd , https://www.huayangenergy.com