Ebyte E73-2G4M08S1CX User manual

E73-2G4M08S1CX
nRF52840 2.4GHz BLE4.2/5.0 Bluetooth LE Module

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 1
Contents
Disclaimer...............................................................................................................................................................................2
Features...........................................................................................................................................................................3
1 Introduction..........................................................................................................................................................................4
1.1 Brief Introduction..................................................................................................................................................... 4
1.2 Application................................................................................................................................................................4
2 Specification and parameter................................................................................................................................................ 5
2.1 Limit parameter........................................................................................................................................................ 5
2.2 Operating parameter................................................................................................................................................. 5
3 Size and pin definition......................................................................................................................................................... 7
4 Development and Application........................................................................................................................................... 10
5 Basic operation.................................................................................................................................................................. 11
5.1 Hardware design and circuit schematic diagram....................................................................................................11
6 FAQ....................................................................................................................................................................................12
6.1 Communication range is too short..........................................................................................................................12
6.2 Module is easy to damage...................................................................................................................................... 12
6.3 BER(Bit Error Rate) is high................................................................................................................................... 13
7 Production guidance.......................................................................................................................................................... 14
7.1 Reflow soldering temperature................................................................................................................................ 14
7.2 Reflow soldering curve...........................................................................................................................................14
8 E73 series...........................................................................................................................................................................15
9 Bulk packing......................................................................................................................................................................15
Revision history....................................................................................................................................................................16
About us................................................................................................................................................................................16

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 2
Disclaimer
EBYTE reserves all rights to this document and the information contained herein.
Products, names, logos and designs described herein may in whole or in part be
subject to intellectual property rights. Reproduction, use, modification or disclosure to
third parties of this document or any part thereof without the express permission of
EBYTE is strictly prohibited.
The information contained herein is provided “as is” and EBYTE assumes no liability
for the use of the information. No warranty, either express or implied, is given,
including but not limited, with respect to the accuracy, correctness, reliability and
fitness for a particular purpose of the information. This document may be revised by
EBYTE at any time. For most recent documents, visit www.ebyte.com.

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 3
Features
13 x 18mm, small size;
Support BLE4.2 and BLE5.0;
Maximum transmission power of 6mW, software multi-level adjustable;
Support the global license- free ISM 2.4GHz band;
Built-in high performance low power ARM⑧and Cortex⑧-M4 dual core processor;
Rich resources, 1024KB FLASH, 256KB RAM;
Support 1.7V~5.5V power supply, power supply over 3. 3Vcan guarantee the best performance;
Industrial grade standard design, support -40 ~ 85 °C for working over a long time;
With IPEX antenna interface, an external antenna is required;
Under ideal conditions, the communication distance can reach 120m.

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 4
1 Introduction
1.1 Brief Introduction
E73-2G4M08S1CX are wireless Bluetooth modules designed by
Chengdu Ebyte which feature small size, low power consumption. It
adopt the originally imported RFIC nRF52840 of NORDIC, supporting
BLE 4.2 and BLE 5.0. The chip has high-performance ARM
CORTEX-M4F kemel and other peripheral resources, such as UART,
I2C, SPI, ADC, DMA, PWM etc. The module led out most IO Port of
nRF 52840 for multilateral development. Please see the pin definition for details.
E73-2G4M08S1CX is hardware platform without firmware, so users need to conduct a secondary development.The
characteristics of the nRF52840 chip can be found in the official Datasheet. The module has maximized the RF
characteristics of the chip.
1.2 Application
Smart homes and industrial sensors;
Security system, positioning system;
Wireless remote control, drone;
Wireless game remote control;
Health care products;
Wireless voice, wireless headset;
Automotive industry applications.

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 5
2 Specification and parameter
2.1 Limit parameter
Main parameter
Performance
Remark
Min
Max
Power supply（V）
0
5.5
Voltage over 5.5V will cause
permanent damage to module
Blocking power（dBm）
-
10
Chances of burn is slim when modules
are used in short distance
Operating temperature（℃）
-40
+85
Industrial
2.2 Operating parameter
Main parameter
Performance
Remark
Min
Type
Max
Operating voltage（V）
1.7
3.3
5.5
≥3.3 V ensures output power
Communication level（V）
3.3
For 5V TTL, it may be at risk of
burning down
Operating temperature（℃）
-40
-
+85
Industrial grade
Operating frequency（MHz）
2360
-
2500
Support ISM band
TX
current
（mA）
TX only run current
(DC/DC, 3 V) PRF = +8 dBm
17.05
mA
TX only run current
(DC/DC, 3 V) PRF = +4 dBm
12.68
mA
TX only run current
(DC/DC, 5 V, REG0 out = 3.3 V)PRF = 0 dBm
7.25
mA
TX only run current
(DC/DC, 3 V)PRF = 0 dBm
7.63
mA
TX only run current
(DC/DC, 3 V) PRF = +8 dBm
17.05
mA
RX
current
（mA）
RX only run current (DC/DC, 3 V)
1 Mbps / 1 Mbps BLE
7.71
mA
RX only run current (DC/DC, 3 V)
2 Mbps / 2 Mbps BLE
8.27
mA
TX power（dBm）
7
8
9
dBm
Receiving sensitivity（dBm）
-103dBm @ BLE 125kbps
Long ditance mode
-95dBm @ BLE 1Mbps

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 6
Main parameter
Description
Remark
Reference distance
120m
Test condition：clear and open area,antenna height: 2.5m，air data
rate: 1Mbps
Crystal Oscillator
32MHz/32.768KHz
32.768KHz crystal needs external connection
Protocol
BLE 4.2/5.0
-
Package
SMD
-
Interface
1.27mm
Stamp hole
IC
nRF52840-QIAAC0/aQFN ™ 73
-
FLASH
1024KB
-
RAM
256KB
-
Core
ARM® Cortex ® -M4
-
Size
13*18mm
-
Antenna
IPEX
50 ohm impedance

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 7
3 Size and pin definition
Pin No.
Item
Corresponding,ch
ip pin item
Direction
Description
1
P1.11
P1.11
Common I/O
See details about nrf52840 datasheet on Nordic
website
2
P1.10
P1.10
Common I/O
Low frequency I0, standard drive
3
P0.03
P0.03/AIN1
Common I/O
Analog input 1, low frequency I/O, standard drive.
4
AI4
P0.28/AIN4
Common I/O
Analog input 4
5
GND
-
-
Single ground line , connect to the power reference
ground.
6
P1.13
P1.13
Common I/O
Low frequency I0, standard drive
7
AI0
P0.02/AIN0
Common I/O
Analog input 0, low frequency I/O, standard drive.
8
AI5
P0.29/AIN5
Common I/O
Analog input 5, low frequency I/O, standard drive.
9
AI7
P0.31/AIN7
Common I/O
Analog input 7, low frequency I/O, standard drive.
10
AI6
P0.30/AIN6
Common I/O
Analog input 6, low frequency I/O, standard drive.

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 8
11
XL1
P0.00/XL1
Common I/O
Connect to 32.768 kHz crystal
12
P0.26
P0.26
Common I/O
See details about nrf52840 datasheet on Nordic
website
13
XL2
P0.01/XL2
Common I/O
Connect to 32.768 kHz crystal
14
P0.06
P0.06
Common I/O
See details about nrf52840 datasheet on Nordic
website
15
AI3
P0.05/AIN3
Common I/O
Analog input 3
16
P0.08
P0.08
Common I/O
See details about nrf52840 datasheet on Nordic
website
17
P1.09
P1.09
Common I/O
See details about nrf52840 datasheet on Nordic
website
18
AI2
P0.04/AIN2
Common I/O
Analog input 2
19
VCC
-
-
Power supply
20
P12
P0.12
Common I/O
See details about nrf52840 datasheet on Nordic
website
21
GND
-
-
Ground line, connect to the power reference ground
22
P0.07
P0.07
Common I/O
See details about nrf52840 datasheet on Nordic
website
23
VDH
VDDH
-
High voltage power supply
24
GND
-
-
Ground line, connect to the power reference ground
25
DCH
DCCH
-
DC/DC converter output
26
RST
P0.18/RESET
Common I/O
QSPI/CSN/external reset
27
VBS
VBUS
-
USB power supply, 5W input, used to USB33V
voltage regulator
28
P15
P0.15
Common I/O
See details about nrf52840 datasheet on Nordic
website
29
D-
D-
-
USB D-
30
P17
P0.17
Common I/O
See details about nrf52840 datasheet on Nordic
website
31
D+
D+
-
USB D+
32
P0.20
P0.20
Common I/O
See details about nrf52840 datasheet on Nordic
website
33
P0.13
P0.13
Common I/O
See details about nrf52840 datasheet on Nordic
website
34
P0.22
P0.22
Common I/O
QSPI
35
P0.24
P0.24
Common I/O
36
P1.00
P1.00
Common I/O
See details about nrf52840 datasheet on Nordic
website
37
SWD
SWDIO
-
Serial debug programming port clock
38
P1.02
P1.02
Common I/O
See details about nrf52840 datasheet on Nordic
website
39
SWC
SWDCLK
-
Serial debug programming port clock
40
P1.04
P1.04
Common I/O
Low frequency I/O, standard drive

Chengdu Ebyte Electronic Technology Co.,Ltd. E73-2G4M08S1CX User Manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd. 9
41
NF1
P0.09/NFC1
Common I/O
NFC input
42
P1.06
P1.06
Common I/O
Low frequency I/O, standard drive
43
NF2
P0.10/NFC2
Common I/O
NFC input