Two quick questions:
1. For command-only subcommands, after writting command to 0X3E and 0X3F(do not writte checksum or length), do we still have to read back 0X3E and 0X3F until it reads back the command instead of 0XFF?
2. Is there a guidance of a brief command execution time? We found the 0X009E and 0X009F execution time(duration between writting command and reading back) is as long as 100ms, does it make sense to you?