Chengdu Ebyte Electronic Technology Co,;Ltd
E70-900T30Suser manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co,;Ltd
20
the power consumption.
For mode 4, the wake-up time decides the
number
of
wake-up
code
before
transmission so as to ensure the wake up
the module in mode 6.
Generally, mode 4 and 6 shall be used
jointly and the wake-up time on both
modules shall be the same.
0
1
0
1500ms
0
1
1
2000ms
1
0
0
2500ms
1
0
1
3000ms
1
1
0
3500ms
1
1
1
4000ms
3
FEC switch
After turn off FEC, the actual data
transmission
rate
increases
while
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.
0
Turn off FEC
1
Turn on FEC (Default)
）
2
IO drive mode
This bit is used to the 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.
0
TXD and AUX push-pull outputs, RXD pull-up inputs
1
TXD
、
AUX open-collector outputs, RXD
open-collector inputs
1
0
transmission power (approximation)
The external power must ensure that the
ability of current output is more than 80mA
and the power supply ripple is within
100mV.
Low
power
transmission
is
not
recommended due to its low power supply
efficiency.
0
0
14dBm (Default)
0
1
10dBm
1
0
7dBm
1
1
4dBm
For example: The meaning of No.3 "SPED" byte
：
The binary bit of the byte
7
6
5
4
3
2
1
0
The specific value
(configured by user)
0
0
0
1
1
0
1
0
Meaning
UART parity bit 8N1
UART baud rate is
9600
Air data rate is 2.4k
Corresponding hexadecimal
1
A
8.Parameter Setting
When the module is in Mode 3 (M0=1 M1=1 M2=0) or Mode 5 (M0=1 M1=0 M2=1), the parameter can be set by
instruction or software in PC. Please visit www.cdebyte.com to download the software.
