Chengdu Ebyte Electronic Technology Co,;Ltd
E32-400T20S User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co,;Ltd
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before mode-switch, using external interrupt function to get AUX change so that the mode-switch can be realized.
This operation is very flexible and efficient. It is totally designed on the basis of the user MCU’s convenience, at the
same time the work load and power consumption of the whole system have been reduced and the efficiency of
whole system is largely improved.
6.2 Normal mode (mode 0)
When M1 = 0 & M0 = 0, module works in mode 0
Transmitting
The module can receive the user data via serial port, and transmit wireless data package of 58 bytes.
When the data inputted by user is up to 58 byte, the module will start wireless transmission. During
which the user can input data continuously for transmission.
When the required transmission bytes are less than 58 bytes, the module will wait 3-byte time and treat
it as data termination unless continuous data inputted by user. Then the module will transmit all the data
through wireless channel.
When the module receives the first data packet from user, the AUX outputs low level.
After all the data are transmitted into RF chip and transmission start , AUX outputs high level.
At this time, it means that the last wireless data package transmission is started, which enables the user
to input another 512 bytes continuously. The data package transmitted from the module working in
mode 0 can only be received by the module working in mode 0 or 1.
Receiving
The wireless receiving function of the module is on, the data packet transmitted from the module
working in mode 0 & mode 1 can be received.
After the data packet is received, the AUX outputs low level, 5ms later the module starts to transmit
wireless data through serial port TXD pin.
After all the wireless data have been transmitted via serial port, the AUX outputs high level.
6.3 Wake-up mode (mode 1)
When M1 = 0 & M0 = 1, module works in mode 1
Transmitting
The condition of data packet transmission & AUX function is the same as mode 0. The only difference
is that the module will add preamble code before each data packet automatically. The preamble code
length depends on the wake-up time set in the user parameters. The purpose of the preamble code is
waking up the receiving module works in mode 2. Therefore, the data package transmitted from mode
1 can be received by mode 0, mode1 and mode 2.
Receiving
The same as that in mode 0.
6.4
Power-saving mode (mode 2)
When M1 = 1 & M0 = 0, module works in mode 2
Transmitting
UART is closed, the module cannot receive any serial port data from outside MCU.
Hence the function of wireless transmission is not available for the module working in this mode.
