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MT7628 DUSUN Core Board

Table of Contents

1 Introduction

1.1 Purpose& Description

The DSOM-080R module produced by Dusun Electronics is a low-cost and low-power 300M IoT module based on MediaTek MT7628NN/MT7628AN/MT7628DAN as the core. This module leads to all the interfaces of MT7628NN/MT7628AN/MT7628DAN, It supports Linux and OpenWrt operating systems and custom development, with rich interfaces and powerful processors, and can be widely used in smart devices or cloud service applications, and can be freely developed for secondary development.

1.2 Product Feature Summary

  • Super data processing capability, MCU main frequency up to 580MHz
  •  300M wireless rate
  •  Support 802.11b/g/n mode
  •  20/40 channel bandwidth
  •  Support AP, STA and AP, STA mixed mode
  •  Support 10/100M adaptive network ports, up to 5
  •  Multiple interfaces SPI/SD-XC/eMMC
  •  Rich peripheral interfaces, SPI, I2C, I2S, PCM, UART, JTAG, GPIO
  •  Widely used in the Internet of Things
  •  Built-in powerful PMU
  •  Built-in 64MB DDR2(MTK7628DAN)
  •  Support 16 Multiple BSSID
  •  Support multiple encryption methods WEP64/128, TKIP, AES, WPA, WPA2, WAPI
  •  Support QoS, WMM, WMM-PS
  •  Support multiple systems, Linux 2.6.36 SDK, OpenWrt 3.10
  •  Working temperature: -20 to +55℃
  •  CE,FCC,SRRC certification

2 Block diagram

WechatIMG578

Module Block diagram

Remark: If you are using 7628, no external DDR2 is required.

3 Interface diagram

WechatIMG579

Interface diagram

4 Basic parameters

ItemparameterRemark
ModeDSM-033Version V1.0
Man chipMT7628AN/MT7628NN/MTK7628DAN
KernelMIPS24KEc
Frequency580MHz
RAMDDR2 128MBMTK7628DAN is 64MB;
64MB can be customized
Flash16MB32MB can be customized
TemperatureWorking Temperature:-20℃~55℃Storage Temperature:-40℃~85℃
Humidity10~95%(Non-condensing)
Atmospheric pressure76Kpa ~106Kpa
Dimension18.7mm×35.2mm×2.8mm

5 Number of interfaces

InterfaceInterface of the moduleInterfaces by the factory default firmware
Wi-FiIEEE 802.11b/g/nSupport
Ethernet5 10M/1001 WAN+4 LAN
UART32 UART, With transparent transmission function
SDIO1not support
SPI1not support
I2C1not support
I2S1not support
PWM1not support
GPIOUp to 8Defined function

Remark:

  1. The factory default programming of the module is the firmware developed by our

company based on Linux; Ethernet、Wi-Fi、UART0 and UART1 of this firmware have

transparent transmission function.

  1. You can burn OPENWRT program or MTK original Linux program according to actual

usage.

6 Mechanical Design

6.1 Module Dimensions

DSOM-080R has 3 columns of Pins. The distance between each Pin is 1.4mm.

Size: 18.7 ±0.35 mm (W)×35.2 ±0.35 mm (L) ×2.8±0.15 mm (H)

WechatIMG580

6.2 Suggested Package Dimensions

WechatIMG581

6.3 Pin definition

WechatIMG582

Pin definition

Pin
number
NameI/O
Type
FunctionRemark
1GNDPGroundSystem Power
23.3VDPPower,supply current≥
33.3VDP1000mA
4GNDPGround
5SPI_CS0I/OSPI0 chip enUndefined, Floating
6REF_CLK0I/OReference clock outputUndefined, Floating
7PERST_NI/OPCIE device resetUndefined, Floating, Don't pull down
8WDT_RST_NWatchdog timeout resetPull down 1s to enter the AirKiss function of
WeChat;
Pull down 3s, Exits transparent transmission
and enters AT mode;
Pull down 6s, the module will restore the
default settings;
9EPHY_LED4I/OPORT4 LED,Active lowLAN4 LED
10EPHY_LED3I/OPORT3 LED,Active lowLAN3 LED
11EPHY_LED2I/OPORT2 LED,Active lowLAN2 LED
12EPHY_LED1I/OPORT1 LED,Active lowLAN1 LED
13EPHY_LED0I/OPORT0 LED,Active lowWAN LED
14PORST_NI/OCPU reset,Active lowCPU Reset,Floating
15UART_TXD1OUart1 TXDUart1 TXD, if not use, Floating, Don't pull
down
16UART_RXD1IUart1 RXDUart1 RXD,if not use, Floating
17I2S_SDII/OI2S data inputUndefined, Floating
18I2S_SDOI/OI2S data outputUndefined, Floating, Don't pull up
19I2S_WSI/OI2S Channel selection ,
0:Left;1:Right
Undefined, Floating
20I2S_CLKI/OI2S clockUndefined, Floating
21GNDPGroundGround
22ANTPAntenna,default openIf you need to connect this pin, you need to
remove the antenna base and replace it
with a 0 ohm resistor
23GNDPGroundGround
24I2C_SCLKI/OI2C ClockUndefined, Floating
25I2C_SDI/OI2C dataUndefined, Floating
26SPI_CS1I/OSPI1 chip enUndefined, Floating, Don't pull up
27SPI_CLKI/OSPI clockUndefined, Floating, Don't pull down
28SPI_MISOI/OSPI Bus data master in
and slave out
Undefined, Floating
29SPI_MOSII/OSPI Bus data master out
and slave in
Undefined, Floating, Don't pull up
30GPIO0I/OUniversal input and
output interface
Undefined, Floating
31UART_TXD0OUart0 TXDUart0 TXD,if not use, Floating, Don't pull up
32UART_RXD0IUart0 RXDUart0 RXD,if not use, Floating
33WLED_NI/OWi-Fi LED,Active lowDuring Wi-Fi communication, the WI-FI LED
flashes and can be floating
34MDI_RP_P0I/OPORT0 Network signal is
receiving positive
WAN port,if not use, Floating
35MDI_RN_P0I/OPORT0 Network signal is
receiving negative
36MDI_TP_P0I/OPORT0 Network signal is
sending positive
37MDI_TN_P0I/OPORT0 Network signal is
sending negative
38MDI_TP_P1I/OPORT1 Network signal is
receiving positive
LAN Port1,if not use, Floating
39MDI_TN_P1I/OPORT1 Network signal is
receiving negative
40MDI_RP_P1I/OPORT1 Network signal is
sending positive
41MDI_RN_P1I/OPORT1 Network signal is
sending negative
42MDI_RP_P2I/OPORT2 Network signal is
receiving positive
LAN Port2,if not use, Floating
43MDI_RN_P2I/OPORT2 Network signal is
receiving negative
44MDI_TP_P2I/OPORT2 Network signal is
sending positive
45MDI_TN_P2I/OPORT2 Network signal is
sending negative
46MDI_TP_P3I/OPORT3 Network signal is
receiving positive
LAN Port3,if not use, Floating
47MDI_TN_P3I/OPORT3 Network signal is
receiving negative
48MDI_RP_P3I/OPORT3 Network signal is
sending positive
49MDI_RN_P3I/OPORT3 Network signal is
sending negative
50MDI_RP_P4I/OPORT4 Network signal is
receiving positive
LAN Port4,if not use, Floating
51MDI_RN_P4I/OPORT4 Network signal is
receiving negative
52MDI_TP_P4I/OPORT4 Network signal is
sending positive
53MDI_TN_P4I/OPORT4 Network signal is
sending negative
54USB_DPI/OUSB data positiveUndefined, Floating
55USB_DMI/OUSB data negativeUndefined, Floating
56GNDPGroundGround

Remark:

  1. I-input; O-output; I/O-digital I/O; P-power supply. The IO port drive current is 10mA, and

the level of all IO pins is 3.3V.

  1. The red on the name column means: it is related to the startup of the chip, and it cannot be

pulled up or down from the outside and cannot be connected to the drive source.

  1. The blue on the remarks column means: our factory default firmware has this function.

7 Electrical Characteristics

7.1 Absolute Electrical Characteristics

ParametersDescriptionMinTyp.MaxUnit
TsStore temperature-20-85
VBATInput voltage3.0-3.8V
Electrostatic discharge voltage
(human body model)
TAMB-25℃--2KV
Electrostatic discharge voltage
(machine model)
TAMB-25℃--0.5KV

7.2 Normal operating conditions

ParametersDescriptionMinTyp.MaxUnit
TaOperating temperature-102555°C
VDD33.33.6V
VILLow-level input voltage-0.3-VDD*0.25V
VIHHigh-level input voltageVDD*0.75-3.6V
VOLLow-level output voltage-VDD*0.1V
VOHHigh-level output voltageVDD*0.8--V
ISTDNo-load running current130230mA
IpeakPeak current-850-mA
PAVGAverage power-650-mW
FoOperating frequency24122484Mhz

8 RF Features

8.1 802.11b 11M

802.11b Transmit (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Tx Power LevelDQPSK182022dBm
Frequency Tolerance-15015ppm
Spectral Mask11MHz→22MHz40dBr
> 22MHz53dBr
Modulation AccuracyAll Data Rate15%
802.11b Receiver (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Min. Input11Mbps PER<8%-91.5-89.5-87.5dBm

8.2 802.11g 54M

802.11g Transmit (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Tx Power LevelOFDM151719dBm
Frequency Tolerance-15015ppm
Modulation AccuracyAll Data Rate-31-28%
802.11g Receiver (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Min. Input54Mbps PER<10%-78-76-74dBm

8.3 802.11n_MCS7(HT20)

802.11n_HT20 Transmit (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Tx Power LevelOFDM151719dBm
Frequency Tolerance-15015ppm
Modulation AccuracyAll Data Rate-31-28%
802.11n_HT20 Receiver (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Min. InputMCS7 PER<10%-76.5-74.5-72.5dBm

8.4 802.11n_MCS7(HT40)

802.11n_HT40 Transmit (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Tx Power LevelOFDM151719dBm
Frequency Tolerance-15015ppm
Modulation AccuracyAll Data Rate-31-28%
802.11n_HT40 Receiver (Conductive)
ItemConditionMin.Typ.Max.Unit
Frequency RangeChannel 1Channel 13
Min. InputMCS7 PER<10%-76.5-74.5-72.5dBm

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