SI4438 Wireless Module
User Manual of E30 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd.
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5.6.3 Configuration Procedure of Module
Only happened when power-on resetting or exiting sleep mode.
5.6.4 Notes for AUX
For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means if it meets
each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX outputs high level.
When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since AUX
outputs high level, the mode switch will be completed.
After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for 2ms. If AUX
stays on the high level, the operating mode can be switched immediately.
When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will reset user
parameters. During it, AUX outputs low level.
6. Operating Mode
The table below shows the status of M1 & M0 and the corresponding modes:
Mode（0-3）
M1
M0
Mode introduction
Remark
Mode 0
Normal
0
0
UART and wireless channel are open. Transparent transmission is on
The receiver must work in
mode 0 or mode 1
Mode 1
Wake-up
1
0
UART and wireless channel are open. The difference between normal
mode and wake-up mode is that it will add preamble code
automatically before data packet transmission so that it can awaken
the receiver works in mode 2
The receiver can work in
mode 0, mode 1 or mode 2
Mode 2
Power-saving
0
1
UART is disabled. Wireless module works at WOR mode (wake on
radio). It will open the UART and transmit data after receiving the
wireless data
1. The transmitter must
work in mode 1
2.
Transmitting
is
not
allowed in this mode
Mode 3
Sleep
1
1
Parameter setting
More in working parameter
