LG69T-AP/AM/AS modules use an external dual UART1/UART2 USB adapter to access the internal STM32H743 MCU and it works very well. My old LG69T-AP EVK board has microUSB connector connected to the LG69T-AP USB pins 38 (VBUS), 39 (USB_DM) and 40 (USB_DP). Are the module pins 39 and 40 connected internally to STM32H743 pins PA11 and PA12 ?
Hi Helg,
Pin 38, pin 39, and pin40 on LG69TAP is reserved. What feature would you like to use on your application?
Best regards.
Hi Raphael,
i want to use the virtual serial ports directly on USB host instead of external dual USB-serial (CP2105 or FTDI). It reduces BOM, place on the PCB, power consumption and is pin-compatible with U-Blox F9.
Such solution may though increase the power comsumption (and dissipation) of the LG69T module itself and require more effective cooling. I guess there was a reason Quectel declared these pins ‘Reserved’ in the more recent products.
