EBYTE Wireless transceiver : Users Manual : Page 15

Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T30S User manual

5.6.1 Indication of UART output

 To wake up external MCU

5.6.2 Indication of wireless transmitting

Buffer (empty): the internal 1000 bytes data in the buffer are written to the RFIC (Auto sub-packaging). When AUX=1,

the user can input data less than 1000 bytes continuously without overflow. Buffer (not empty): when AUX=0, the internal

1000 bytes data in the buffer have not been written to the RFIC completely. If the user starts to transmit data at this

circumstance, it may cause overtime when the module is waiting for the user data, or transmitting wireless sub

package.When AUX = 1, it does not mean that all the UART data of the module have been transmitted already, perhaps the

last packet of data is still in transmission.