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AM623: 4ATCGGAALW

Part Number:AM623

请问AM623X在没有UBOOT和系统的情况下,串口有没有打印信息呢?会不会像335X那样一直打印“C”

Shine:

和335x一样会打印CCCC,请看下面TRM手册里的说明。5.4.7.1 UART Bootloader OperationOnce the ROM Code configures the UART, it sends the UART pings for few seconds, which can be seen in the host. The pings consist of an ASCII capital C character. The UART boot mode supports only the CRC mode of XMODEM and does not support CHECKSUM mode. Both 128 and 1024 byte block sizes are supported. https://www.ti.com/lit/ug/spruiv7a/spruiv7a.pdf

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