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Chengdu Ebyte Electronic Technology Co,;Ltd
6
1
0
5
0
0
0
0
1
1
1
1
2
0
1
1
1
0
0
0
1
For example: The meaning of No.3 "SPED" byte:
The binary bit of the byte
Configures by user
Meaning
Corresponding hexadecimal
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd
IO drive mode (default 1)
TXD and AUX push-pull outputs, RXD pull-up inputs
TXD、AUX open-collector outputs, RXD open-collector
inputs
4
3
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
FEC switch
Turn off FEC
Turn on FEC (default)
0
Transmission power (approximation)
0
Transmission power (approximation)
20dBm(default)
0
0
1
0
7
6
0
0
UART parity bit 8N1
wireless wake-up time
250ms (default)
500ms
750ms
1000ms
1250ms
1500ms
1750ms
2000ms
17dBm
14dBm
10dBm
5
4
0
1
UART baud rate is 9600
1
E30-490T20D user manual
This bit is used to the module internal
pull-up resistor. It also increases the level's
adaptability in case of open drain. But in
some cases, it may need external pull-up
resistor.
The transmit & receive module work in
mode 0, whose delay time is invalid & can be
arbitrary value.
The transmitter works in mode 1 can transmit
the preamble code of the corresponding time
continuously.
When the receiver works in mode 2, the time
means the monitor interval time (wireless
wake-up). Only the data from transmitter that
works in mode 1 can be received.
After turn off FEC, the actual data
transmission
rate
anti-interference ability decreases. Also the
transmission distance is relatively short.
Both communication parties must keep on
the same pages about turn-on or turn-off
FEC.
The external power must make sure the ability
of current output more than 250mA and ensure the
power supply ripple within 100mV.
Low power transmission is not recommended
due to its low power supply efficiency.
3
2
1
1
0
1
Air data rate is 2.4k
A
increases
while
0
0
15
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