The RS232 to TTL converter module is widely used in radio modifications,phone flash, XBOX360 flash, GPS, vehicle detection, DVD flash, hard disk repair set-top box upgrade. It can be used to program STC MCU, NXP MCU,Renesas MCU, STM32 MCU, N+-2EC MCU.
Operates up to 250 kbit/s
Low supply current 300 µA typical
Operating voltage: 3.3V-5V DC
Operating current: 6mA
Power supply: external
Interface: TXD, RXD, GND, VCC
Hello, there're 4 pins, VCC, GND, RX and TX.
You can refer to the picture.
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