Data Sheet

www.veear.eu
8 EasyVR 3 (Plus) User Manual (1.0.17)
Pin assignment
Group
Name
Number
Pin
Type
Description
●
MIKROBUS
J1
1
-
-
(Not connected)
2
RST
I
Active low asynchronous reset (internal pull-up)
3-6
-
-
(Not connected)
7
3V3
I
3.3V DC power input
8
GND
-
Ground
J2
1
XM
I
Boot select (internal pull-down)
2
DE
O
(Reserved)
3
TX
O
Serial Data Transmit
4
RX
I
Serial Data Receive
5-6
-
-
(Not connected)
7
5V
I
5.0V DC power input
8
GND
-
Ground
●
GPIO
J3
1
IO1
I/O
General purpose I/O (VDD logic levels)
2
IO2
I/O
General purpose I/O (VDD logic levels)
3
IO3
I/O
General purpose I/O (VDD logic levels)
4
IO4
I/O
General purpose I/O (VDD logic levels)
5
IO5
I/O
General purpose I/O (VDD logic levels)
6
IO6
I/O
General purpose I/O (VDD logic levels)
●
AUDIO
J4
1
SP+
O
Differential audio output (can directly drive 8Ω
speaker)
2
SP-
O
3
VM
O
Microphone power (to support custom
microphones)
4
MIC
I
Microphone audio input
5
RET
-
Microphone return (analog ground)
6
VDD
O
Internal logic voltage (for reference only)
●
CABLES
J5
1
SP-
O
Differential audio output (can directly drive 8Ω
speaker)
3
SP+
O
2
-
-
(Not connected)
J6
1
MIC
I
Microphone audio input
2
RET
-
Microphone return (analog ground)
●
ADAPTER
J7
1
RX_P
O
Programming cable serial data receive
2
RTS_P
I
Programming cable request to send (reset/boot
control)
3
GND
-
Programming cable ground
4
5V_P
I
Programming cable 5V DC power output
5
TX_P
I
Programming cable serial data transmit
6
CTS_P
O
Programming cable clear to send (tied to ground)