User's Manual

CONFIDENTIAL
9
Modem control and monitor are done by UART which is defined in reserved pin 17 & 19 of
mini PCIe interface. UART0_TXD and UART0_RXD voltage is 1.8V. Default baud rate is
921600/n/8/1. If CPE board baud rate cannot support such high bit rate, reducing baud rate is
doable from UART at boot loader mode or by pre-configuration.
To update UART port baudrate, go to boot loader (reboot and press enter key during booting), and follow the
commands to update new value. Reboot is still required to take new baudrate working.