User's Manual

For Internal Use Only
If there is not any phenomenon on LED1 and USART after reset modem, this modem embed Atmel bootloader.
b) Bootloader and application mixed
If modem have bootloader and application in corresponding flash memory, using above method is useless. We
can use SET_BOOTLOADER(0x5B 24 56 5D) to distinguish.
First, send SET_BOOTLOADER through USART port to modem.
Then, if modem reset and print startup menu of application as below, this modem embed Atmel bootloader.
If modem print startup menu of RAELoader as below and toggle LED1 very quickly, this modem embed
RAELoader.