XR‐21A WIFI module XR-21AUsermanual VersionV1 Copyright©2019 Copyright©2019 ShenzhenJiXinInteligenceCo.
XR‐21A WIFI module This device is intended only for OEM integrators under the following conditions: 1) The antenna must be installed such that 20 cm is maintained between the antenna and users, and 2) This device and its antenna(s) must not be co‐located with any other transmitters except in accordance with FCC multi‐transmitter product procedures. Referring to the multi‐transmitter policy, multiple‐transmitter(s) and module(s) can be operated simultaneously without C2P.
XR‐21A WIFI module 1.
XR‐21A WIFI module 1.1 Appearance Dimensions Copyright©2019 ShenzhenJiXinInteligenceCo.
XR‐21A WIFI module 1.2 Features IEEE802.11b/g/n,1x1SISO2.4GHz Built-in ARM Cortex-M4F 32bit MCU with main frequency from 32KHz to 160MHz,supportRTOS Built-in256KBSRAMand160KBROM SupportexternalFlashandeXecuteInPlace(XIP) 8shareduniversalDMAchannels Built-in6ways12bitSARtypeA/Dconverter Built-inWi-FiMAC/BB/RF/PA/LNA SupportWEP,WPA/WPA2,WPS2.
XR‐21A WIFI module 1.3 Key parameter Table1.1Descriptionofthemainparameters Module model XR-21A Mounting SMD16 Size(mm) 24*16*3(±0.2) Cert. FCC、CE、IC、REACH、RoHS SPI Flash 32Mbit(default) Interface UART/GPIO/ADC/PWM/I2C/SPI Number of GPIO 13 UART baud. 9600/19200/38400/115200/921600bps Freq. 2412~2462MHz Antenna OnboardPCBantenna 802.11b:17±2dBm(@11Mbps) Tx Power 802.11g:15±2dBm(@54Mbps) 802.
XR‐21A WIFI module 54Mbps(3/464-QAM):-76dBm HT20,MCS7(65Mbps,72.2Mbps):-74dBm RXActive(MCUactive,DC-DCmode):31mA TXActive(MCUactive,DC-DCmode): 164mA@11nMCS714dBm Power dissipation 192mA@11bCCK19dBm (Typical) Standby:~26.5uA Hibernation:~4uA Shutdown:~0.5uA Security WEP/WPA-PSK/WPA2-PSK/WPS2.0 Power Supply DC2.7V~5.5V，Imax>300mA Temperature -40℃~85℃ Storage Condition -55℃~150℃,<90%RH Copyright©2019 ShenzhenJiXinInteligenceCo.
XR‐21A WIFI module 2. Pin definition XR-21A module has 16 pins，features are shown in Figure 2.1 and Table2.2. Figure2.1XR-21APindiagram Table2.2Pindescription Number Name Function description 1 RST Reset 2 PA12 ADC_CH2;PWM4/ECT4;IR_TX；EINTA12 3 PB2 SWD_TMS；JTAG_TD0；PWM6/ECT6；EINTB2； downloadmode:pull-down，workmode:donothandle orpull-up Copyright©2019 ShenzhenJiXinInteligenceCo.
XR‐21A WIFI module 4 PA23 EXT_DCDC_PUP ； WUPIO9(wake up IO) ； EINTA23 ； defaultcannotbehigh 5 PA0 TWI1_SCL；EINTA0 6 PA1 TWI1_SDA；EINTA1； PA18;TWI0_SDA;IR_TX;IR_RX;EINTA18 7 PA22 UART2_TX；PWM3/ECT3；SPI1_CS0；WUPIO8；EINTA22 8 VCC powersupply,2.7~5.
XR‐21A WIFI module Table2.3 Startmode mode RST rising Download edge rising Run edge PB2 PB3 low low low high high low high high Notice:PB2andPB3hadbeenpulledupinmodule,modulehasself-reset function 3. Electrical parameters 3.1 Electrical characteristics parameter testcondition min typ max unit Storage - -55 normal 150 ℃ Worktemp.
XR‐21A WIFI module VIH VOL VOH VCC_IO=3.3V 2.06 - 3.6 V VCC_IO=3.3V, -0.3 - 0.4 V 2.9 - 3.4 V - - 12 mA |IOL|=7.5~50mA VCC_IO=3.3V, |IOL|=7.5~50mA IMAX - 3.2 Wi-Fi RF characteristic Description Min Typ. Max Unit CentralFreq. 2412 - 2462 MHz - - -10 dB Enterreflectionvalue Transmit Power CCK,1Mbps 17.08 17.48 - dBm CCK,11Mbps 16.74 17.03 - dBm 6MbpsOFDM 16.89 17.
XR‐21A WIFI module EVM CCK,1Mbps -19.44 -19.85 - dB CCK,11Mbps -21.66 -21.96 - dB 6MbpsOFDM -19.46 -20.01 - dB 54MbpsOFDM -31.59 -32.8 - dB HT20,MCS0 -23.14 -23.45 - dB HT20,MCS7 -32.22 -32.
XR‐21A WIFI module ‐ 200.0 ‐ mA ‐ 212.0 ‐ mA ‐ 209.0 ‐ mA ‐ 204.0 ‐ mA ‐ ‐ ‐ ‐ ‐ ‐ 39.0 40.0 46.0 42.0 49.0 217.0 ‐ ‐ ‐ ‐ ‐ ‐ mA mA mA mA mA mA RX RX listen 1M DSSS DTIM1 ‐ ‐ ‐ ‐ ‐ ‐ mA mA uA OFF OFF OFF ‐ ‐ DTIM3 DTIM8 DTIM10 ‐ ‐ ‐ ‐ ‐ ‐ ‐ 40.5 33.3 1074. 0 435.0 200.0 167.0 47.0 3.5 ‐ ‐ ‐ ‐ ‐ uA uA uA uA uA OFF OFF ‐ ‐ ‐ 0.
XR‐21A WIFI module 4. Reflow welding temperature curve 5. Application circuit Copyright©2019 ShenzhenJiXinInteligenceCo.
XR‐21A WIFI module 6. Contact Us Address：A505Room,BusinessBuilding,SuojiaSciencePark,Xixiang,BaoanDistrict,Shenzhen Telephone：0755-23220940 Website：www.aimachip.com Copyright©2019 ShenzhenJiXinInteligenceCo.
Federal Communication Commission Statement (FCC, U.S.) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
Information that must be placed in the end user manual: The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user's manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.
Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01 2.2 List of applicable FCC rules FCC Part 15 Subpart C 15.247 & 15.207 & 15.209 2.3 Specific operational use conditions The module is a WIFI module with WIFI 2.4G function. Operation Frequency: 2412~2462MHz Number of Channel: 11 Modulation: 802.11b CCK; 802.11g/n OFDM Type: PCB Antenna Gain: 2 dBi Max. The module can be used for mobile or applications with a maximum 2dBi antenna.
2.9 Information on test modes and additional testing requirements Operation Frequency: 2412~2462MHz Number of Channel: 11 Modulation: GFSK, 802.11b CCK; 802.11g/n OFDM Host manufacturer must perfom test of radiated & conducted emission and spurious emission, etc according to the actual test modes for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product.
FCC STATEMENT : This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Warning: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
