Chengdu Ebyte Electronic Technology Co., Ltd.
E220-900T30D User Manual
Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co.,Ltd.
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When the module is switched from other modes to sleep mode, if the data has not been processed yet;
The module will process these data (including receiving and sending) before entering sleep mode. This feature can be
used for fast sleep, which saves power; for example, the transmitter module works in mode 0, the user transmits the
serial port data "12345", and then does not have to wait for the AUX pin to be idle (high level), and can directly switch
to sleep mode. And the user's main MCU immediately sleeps, the module will automatically transmit the user data
through the wireless, and automatically enters sleep within 1ms;
This saves MCU's working time and reduces power consumption.
4
Similarly, any mode switching can use this feature. After the module processes the current mode event, it will
automatically enter the new mode within 1ms; thus, eliminating the need for the user to query AUX and achieve the
purpose of fast switching;
For example, switching from the transmit mode to the receive mode; the user MCU can also enter sleep before the mode
switch, and use the external interrupt function to acquire the AUX change, thereby performing mode switching.
5
This operation mode is very flexible and efficient, and is designed according to the user's MCU's operation convenience,
and can reduce the workload of the entire system as much as possible, improve system efficiency, and reduce power
consumption.
6.2 Normal mode
（
Mode 0
）
Table 6-2 Normal mode
Type
When M0 = 0, M1 = 0, the module works in mode 0
Transmitting
Users can input data through the serial port and the module will start wireless transmission.
Receiving
The module wireless receiving function is turned on, and after receiving the wireless data, it will be output
through the serial port TXD pin.
6.3 WOR sending mode (Mode 1)
Table 6-3 WOR sending mode
Type
When M0 = 1, M1 = 1, the module works in mode 1
Transmitting
When defined as a transmitting party, a preamble is automatically added before transmitting.
Receiving
It can receive data normally, the receiving function is the same as mode 0.
6.4 WOR receiving mode (Mode 2)
Table 6-4 WOR receiving mode
Type
When M0 = 0, M1 = 1, the module works in mode 2
