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Chengdu Ebyte Electronic Technology Co.,Ltd.
3 Size and pin definition
Pin No.
Item
1
TO
2
VCC
3
M0
4
GND
5
M1
6
NC
7
NC
8
NC
9
GND
SWD_DI
10
O
11
RXD
SWD_CL
12
K
13
TXD
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
Direction
Used to indicate the working status of the module; the user
output
wakes up the external MCU , and outputs a low level during
the initialization of the power-on self-test; (can be suspended)
enter
Power input 5.0V
Input
Cooperate with M1 to determine the 4 working modes of the
( very weak pull-up )
module (not floating, if not used, it can be grounded)
-
power reference ground
Input
Cooperate with M0 to determine the 4 working modes of the
( very weak pull-up )
module (not floating, if not used, it can be grounded)
-
-
-
-
-
-
-
power reference ground
Program download data interface ( the module needs to be
input \ output
reset or erased before SWD programming )
enter
TTL serial port input, connect external TXD output pin
Program download clock interface ( the module needs to be
input \ output
reset or erased before SWD programming )
output
TTL serial port output, connect external RXD input pin
E22-xxxTxxE User Manual
Description
6
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