Ebyte E73-2GM08S1C User manual

E73-2G4M08S1C User Manual
nRF52840 2.4GHz SMD Wireless Module

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 1
Contents
1 Product overview................................................................................................................................................................. 2
1.1 Brief Introduction..................................................................................................................................................... 2
1.2 Features.....................................................................................................................................................................2
1.3 Application................................................................................................................................................................2
2 Specification and parameter................................................................................................................................................ 3
2.1 Limit parameter........................................................................................................................................................ 3
2.2 Operating parameter................................................................................................................................................. 3
3 Size and pin definition......................................................................................................................................................... 5
4 Development and Application............................................................................................................................................. 7
5 Basic operation.................................................................................................................................................................... 8
5.1 Hardware design....................................................................................................................................................... 8
6 FAQ......................................................................................................................................................................................9
6.1 Communication range is too short............................................................................................................................9
6.2Module is easy to damage..........................................................................................................................................9
6.3 BER(Bit Error Rate) is high................................................................................................................................... 10
7 Production guidance.......................................................................................................................................................... 10
7.1 Reflow soldering temperature................................................................................................................................ 10
7.2 Reflow soldering curve...........................................................................................................................................11
8 E73 series...........................................................................................................................................................................11
9 Antenna recommendation.................................................................................................................................................. 12
9.1 Recommendation.................................................................................................................................................... 12
Revision history....................................................................................................................................................................12
About us................................................................................................................................................................................12

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 2
1 Product overview
1.1 Brief Introduction
E73-2G4M08S1C 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 kernel and other peripheral resources, such as
UART, I2C, SPI, ADC, DMA, PWM etc. The module led out most
IO Port of nRF52840 for multilateral development.Please see the pin definition for details.
E73-2G4M08S1C 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.
1.2 Features
Small size: 13x18mm;
Support BLE4.2 and BLE 5.0;
The measured communication distance is up to 120m;
Maximum transmission power of 6mW, software multi-level adjustable;
Support the global license-free ISM 2.4GHz band;
Built-in high performance low power ARM® and Cortex ® -M4 dual core processor;
Rich resources, 1024KB FLASH, 256KB RAM;
Support 1.7V~5.5Vpower supply, power supply over 3.3Vcan guarantee the best performance;
Industrial grade standard design, support -40 ~ 85 °C for working over a long time;
Built-in ceramic antenna, no antenna is required for the built-in antenna.
1.3 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. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 3
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
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（GHz）
2360
-
2500
Support ISM band
Transmitting current
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 =
0dBm
-
7.25
-
mA
TX only run current
(DC/DC, 3 V)P RF =
0 dBm
-
7.63
-
mA

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 4
TX only run current
(DC/DC, 3 V) PRF =
+8 dBm
-
17.05
-
mA
Receiving current
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
Transmitting power
7
8
9
dBm
Receiving sensitivity
-103 dBm@BLE 125kbps(long distance mode), -95 dBm@BLE 1M
Main parameter
Description
Remark
Reference distance
120m
Clear and open area, antenna gain: 5dBi, antenna height:
2.5m，air data rate: 1Mbps
Crystal Oscillator
32MHz
Protocol
BLE 4.2/5.0
Package
SMD
Interface
1.27mm
Stamp hole/Ceramic antenna
IC
nRF52840-QIAAC0/ aQFN ™ 73
FLASH
1024KB
RAM
256KB
Core
ARM® Cortex ® -M4
Size
13.0 * 18.0 mm
Antenna
ceramic antenna
50 ohm impedance

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 5
3 Size and pin definition
No.
Pin item
Corresponding
chip pin item
Pin direction
Application
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 I/O, 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 I/O, 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

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 6
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
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
VDD
-
-
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 ，5V input ，used to
USB3.3V voltage regulator
28
P15
P0.15
Common I/O
See details about nrf52840 datasheet on Nordic
website
29
D-
-
-
USB D-
30
P17
P0.17
Common I/O
See details about nrf52840 datasheet on Nordic
website
31
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
QSPI
36
P1.00
P1.00
Common I/O
See details about nrf52840 datasheet on Nordic

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 7
website
37
SWD
SWDIO
-
Serial debug programming port data
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
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
4 Development and Application
No.
Item
Notes
1
Burn
Firmware
1.The module is embedded with ARM MCU. For program downloading, please use the J-LINK downloader.
Any other serial port or JTAG、ISP、ICP are unavailable to download.
1.The burn firmware needs to be completed in two parts. Since the protocol stack provided by NORDIC is not
loaded in the program, in the second development, you need to use the official burning tool nRFgo studio to
burn the protocol stack, and then use nRFgo studio to burn. The hex of the application code; you can also use
the official burning tool nRFgo studio to burn the protocol stack, and then download it with IAR or KEIL.
Website of tool download:
http://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF52832/(language)/eng-GB
2
Testing
Board
Testing board is not available.

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 8
5 Basic operation
5.1 Hardware design
It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible and
the module needs to be reliably grounded.
Please pay attention to the correct connection of the positive and negative poles of the power supply, reverse
connection may cause permanent damage to the module.
Please check the power supply to ensure that between the recommended supply voltage, if exceeding the maximum,
the module will be permanently damaged;
Please check the stability of the power supply. Voltage can not fluctuate greatly and frequently;
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the
margin, so the whole machine is beneficial for long-term stable operation;
The module should be as far away as possible from the power supply, transformers, high-frequency wiring and other
parts with large electromagnetic interference;
Bottom Layer High-frequency digital routing, high-frequency analog routing, and power routing must be avoided
under the module. If it is necessary to pass through the module, assume that the module is soldered to the Top Layer,
and the copper is spread on the Top Layer of the module contact part(well grounded), it must be close to the digital
part of the module and routed in the Bottom Layer;

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 9
Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the Bottom Layer
or other layers, which will affect the module's spurs and receiving sensitivity to varying degrees;
It is assumed that there are devices with large electromagnetic interference around the module that will greatly
affect the performance. It is recommended to keep them away from the module according to the strength of the
interference. If necessary, appropriate isolation and shielding can be done;
Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency analog,
power traces) around the module that will greatly affect the performance of the module. It is recommended to stay
away from the module according to the strength of the interference.If necessary, appropriate isolation and shielding
can be done;
If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is
still a risk of damage);
Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0;
The mounting structure of antenna has a great influence on the performance of the module. It is necessary to ensure
that the antenna is exposed, preferably vertically upward. When the module is mounted inside the case, use a good
antenna extension cable to extend the antenna to the outside;
The antenna must not be installed inside the metal case, which will cause the transmission distance to be greatly
weakened.
6 FAQ
6.1 Communication range is too short
The communication distance will be affected when obstacle exists;
Data lose rate will be affected by temperature, humidity and co-channel interference;
The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground;
Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea;
The signal will be affected when the antenna is near metal object or put in a metal case;
Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the
distance);
The power supply low voltage under room temperature is lower than recommended value, the lower the voltage, the
lower the transmitting power;
Due to antenna quality or poor matching between antenna and module.
6.2 Module is easy to damage
Please check the power supply and ensure it is within the recommended range. Voltage higher than the peak will
lead to a permanent damage to the module.
Please check the stability of power supply and ensure the voltage not to fluctuate too much.
Please make sure anti-static measures are taken when installing and using, high frequency devices have electrostatic
susceptibility.
Please ensure the humidity is within limited range for some parts are sensitive to humidity.
Please avoid using modules under too high or too low temperature.

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 10
6.3 BER(Bit Error Rate) is high
Here are co-channel signal interference nearby, please be away from interference sources or modify frequency and
channel to avoid interference;
Poor power supply may cause messy code. Make sure that the power supply is reliable;
The extension line and feeder quality are poor or too long, so the bit error rate is high.
7 Production guidance
7.1 Reflow soldering temperature
Profile Feature
曲线特征
Sn-Pb Assembly
Pb-Free Assembly
Solder Paste
Solder paste
Sn63/Pb37
Sn96.5/Ag3/Cu0.5
Preheat Temperature min (Tsmin)
Min preheating temp.
100℃
150℃
Preheat temperature max (Tsmax)
Max preheating temp.
150℃
200℃
Preheat Time (Tsmin to Tsmax)(ts)
Preheating time
60-120 sec
60-120 sec
Average ramp-up rate(Tsmax to Tp)
Average ramp-up rate
3℃/second max
3℃/second max
Liquidous Temperature (TL)
Liquid phase temp
183℃
217℃
Time(tL)Maintained Above(TL)
Time below liquid phase
line
60-90 sec
30-90 sec
Peak temperature(Tp)
Peak temp
220-235℃
230-250℃
Aveage ramp-down rate(Tp to Tsmax)
Average ramp-down rate
6℃/second max
6℃/second max
Time 25℃ to peak temperature
Time to peak
temperature for 25℃
6 minutes max
8 minutes max

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 11
7.2 Reflow soldering curve
8 E73 series
Model
IC
Frequency
Hz
Tx
power
dBm
Distance
km
Protocol
Package
Size
mm
Antenna
E73-2G4M08S1C
nRF52840
2.4G
8
0.1
BLE 4.2/5.0
SMD
13.0 * 18.0
Ceramic
antenna/Sta
mp hole
E73-2G4M04S1A
nRF52810
2.4G
4
0.1
BLE 4.2/5.0
SMD
17.5 * 28.7
PCB/IPX
E73-2G4M04S1D
nRF51822
2.4G
4
0.1
BLE 4.2
SMD
17.5 * 28.7
PCB/IPX
E73-2G4M04S1B
nRF52832
2.4G
4
0.1
BLE 4.2/5.0
SMD
17.5 * 28.7
PCB/IPX

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 12
9 Antenna recommendation
9.1 Recommendation
The antenna is an important role in the communication process. A good antenna can largely improve the
communication system.
Model No.
Type
Connector
Gain
dBi
Height
Cable
Feature
TX2400-NP-5010
Flexible
Antenna
IPEX
2
50*10mm
-
FPC soft antenna
TX2400-XP-150
Sucker antenna
SMA-J
3.5
15cm
150cm
High Gain
TX2400-JK-20
Rubber antenna
SMA-J
3
200mm
-
Flexible&omnidirectional
TX2400-JK-11
Rubber antenna
SMA-J
2.5
110mm
-
Flexible&omnidirectional
TX2400-JZ-3
Rubber antenna
SMA-J
2
30mm
-
Short straight &omnidirectional
Revision history
Version
Date
Description
Issued by
1.00
2018/8/30
Initial version
huaa
1.10
2018/9/28
Version split
huaa
1.40
2018/11/6
new version update
Huaa
1.5
2019/2/19
Content modification
Ray
1.7
2019/8/20
Contect updated
lyl
About us
Technical support: [e-mail]
Documents and RF Setting download link:：www.ebyte.com
Thank you for using Ebyte products! Please contact us with any questions or suggestions: [e-mail]
-------------------------------------------------------------------------------------------------
Official hotline:[phone] ext. 821 Web: www.ebyte.com
Address: Innovation Center D347, 4# XI-XIN Road,Chengdu, Sichuan, China

Chengdu Ebyte Electronic Technology Co., Ltd. E73-2G4M08S1C User Manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co., Ltd 13