Lierda Science & Technology Ltd LSDSCIENCE&TECHNOLOGYCO.,LTD. LSD4WF-2MD05106(XXXY) Low Power Wi-Fi Module User Manual Model ：LSD4WF-2MD05106 Name ：Wi-Fi Module Revision ：v1.
Index 1.Productoverview ..............................................................................................................................................3 1.1GeneralDescription ................................................................................................................................3 1.2Features .....................................................................................................................................................3 2.Parameters .........
1. Product overview 1.1 General Description LSD4WF-2MD05106 is a Wi-Fi module for any electronic device to achieve networking capabilities. The module is fully in line with the 802.11b/g/n international standard specification, the internal integrated high performance Wi-Fi chip make it easy to access the serial port equipment or MCU control equipment to network, so as to realize wireless networking. Built-in TCP/IP protocol stack, supports STA/AP/STA+AP coexistence working modes, supports 802.
2. Parameters Parameters Standard 802.11 b/g/n Frequency 2.412GHz-2.462GHz 802.11b:+17.0±0.5dBm(@11Mbps) Emitting power 802.11g:+15.5±0.5dBm(@54Mbps) 802.11n:+15.5±0.5dBm(@HT20,MCS7) Wireless Parameters Receiving Sensitivity Type of Modulation Hardware Parameters Software parameters 802.11b: -83 dBm (@1Mbps ,CCK) 802.11g: -74dBm (@54Mbps, OFDM) 802.11n: -61dBm (@HT20, MCS7) 802.11g/n OFDM(BPSK,QPSK,16QAM,64QAM) 802.11bCCK11Mbps,5.
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4. Pin definition Pic 1-4 LSD4WF-2MD05106 Module pin layout PIN Pin Definition Function 1 Ground pin 6 GND JTAG_CLK/GPIOE_4 JTAG_TDO/PWM2/SPI0_MOSI/GPIOE_2 JTAG_TDI/PWM1/SPI0_CLK/GPIOE_1 JTAG_TMS/PWM3/SPI0_MISO/GPIOE_3 PWM0/SPI0_CS0/GPIOE_1 7 NC NC 8 GPIOC_4 VDD NC NC NC NC NC NC GPIO 2 3 4 5 9 10 11 12 13 14 15 Program download port Program download port Program download port Program download port Multiplex pin VCC（DC_3.
16 GPIOF_5 17 GND NC NC NC NC NC NFC_IN NFC_IP NC 18 19 20 21 22 23 24 25 26 GPIOB_0 27 GPIOB_1 NC NC NC VDD GND NC VDD GPIOC_5 NC NC 28 29 30 31 32 33 34 35 36 37 38 GPIOB_2 39 UART2_TX/GPIOA_4 UART2_RTS/GPIOA_2 UART2_RX/GPIOA_0 UART2_CTS/GPIOA_1 40 41 42 43 GPIOA_5（nLink） 44 GPIOA_3（nReady） 45 GPIOB_3（nReload） EEPROM_SEL 0:Internal NV memory select 1:External EEPROM select Define：pull-down Ground pin NC NC NC NC NC NFC+ NFC‐ NC BOOT_SCENARIO 0:booting from internal 1:booting flash Define
NC Reset GND 46 47 48 NC Reset pin Ground pin Table 1-1 LSD4WF-2MD05106 Module pin definition 5. Behavior of electricity Parameters Working voltage Minimum Typical value Maximum Unit 3.0 3.3 3.6 V Standby current 15 mA Static current 26 mA TX current 160 mA RX current 65 mA Table1-2 LSD4WF-2MD05106 behavior of electricity 6.
7. Reference design PCB onboard antenna is built in LSD4WF-2MD05106 module, users should using onboard antenna design need to be cautious that： 1, No components or GND on antenna area of user board 2, Keep antenna away from metal, stay over 10mm away from surrounding higher components. 3, Antenna can’t be covered by metal case and it should be over 10mm away from plastic casing. During specific design, users can consult the Lierda technical engineer to assist in the place of the module and related Layout.
Pic 1-7 Developing board (back) External interface introduction, table: 1-4 Function External interface Item Description USB2TTL UART to USB debugging port, can be used for power supply USB DEBUG USB2.
Button nLink Module connection indication On：Wi-Fi connected； Off：Wi-Fi unconnected； WPS Function reserve nReset Reset Sleep_RQ Function reserve nReload Press button for over 4 seconds to restore to factory settings.
