Shenzhen jixininteligence Xr-50b User manual

XR-50B WIFI module

XR-50B User manual

Version V1

XR-50B WIFI module

Page 1 of 17

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.

3) For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G

band by supplied firmware programming tool. OEM shall not supply any tool or info to the end‐user

regarding to Regulatory Domain change.

USERS MANUAL OF THE END PRODUCT:

In the users manual of the end product, the end user has to be informed to keep at least 20cm

separation with the antenna while this end product is installed and operated. The end user has to be

informed that the FCC radio-frequency exposure guidelines for an uncontrolled environment can

be satisfied.

The end user has to also be informed that any changes or modifications not expressly

approved by the manufacturer could void the user's authority to operate this equipment

. If the size of the end product is smaller than 8x10cm, then additional FCC part 15.19 statement is

required to be available in the users manual:

This device complies with Part 15 of FCC rules. Operation is subject to the following two co

nditions: (1) this device may not cause harmful interference and (2) this device must

accept any interference received, including interference that may cause undesired operation.

LABEL OF THE END PRODUCT:

The final end product must be labeled in a visible area with the following " Contains

FCC ID: 2AVTT-XR50B ". If the size of the end product is larger than 8x10cm, then the following

FCC part 15.19 statement has to also be available on the label:

This device complies with Part 15 of 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.

Labels: Host Device must contain the following label on the outside of the unit:

Contains FCC ID：2AVTT-XR50B

Installation Guidance

The final host / module combination may also need to be evaluated against the FCC Part 15B criteria

for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device.

The user’s manual or instruction manual for an intentional or unintentional radiator shall caution the

user that changes or modifications not expressly approved by the party responsible for compliance

could void the user's authority to operate the equipment. In cases where the manual is provided only

in a form other than paper, such as on a computer disk or over the Internet, the information required

by this section may be included in the manual in that alternative form, provided the user can

reasonably be expected to have the capability to access information in that form.

To ensure compliance with all non-transmitter functions the host manufacturer is responsible for

ensuring compliance with the module(s) installed and fully operational. For example, if a host was

previously authorized as an unintentional radiator under the Declaration of Conformity procedure

without a transmitter certified module and a module is added, the host manufacturer is responsible

for ensuring that the after the module is installed and operational the host continues to be compliant

with the Part 15B unintentional radiator requirements.

The FCC rule/s for this module are CFR 47 Part 15 Subpart C.

Additional testing and certification may be necessary when multiple modules are used.

XR-50B WIFI module

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1、Product Overview

The XR-50B WiFi module was developed to meet the IOT application of speech

recognition, consisting of the core processor XR872, AC107 audio CODEC , power supply and

auxiliary circuit. The XR872 integrates ARM-M4F MCU and high-capacity SRAM in a smaller

package with operating frequency up to 384MHz. The XR872 is a highly integrated low-power

Wi-Fi microcontroller SoC that integrates Wi-Fi MAC/BB/RF/PA/LNA, high-performance and

highly integrated MCUs, enabling software to perform more complex tasks and support

hardware encryption engines such as AES/DES/3DES/SHA/MD5/CRC to make data

transmission more secure and faster. The new digital RF transmitter, designed with

XRADIOTECH's MPDTM technology, provides higher output power and maintains higher

efficiency, keeping the chip insensitive to antenna mismatches, but always has a good EVM

under different VSWR. It also includes a number of peripherals, including UART, TWI, SPI,

DMIC, Audio Codec, PWM, CIR (T/R), CSI, SDIO and Auxiliary ADC.

The XR-50B WiFi module supports the standard IEEE802.11 b/g/n protocol, RTOS, and has

a complete TCP/IP protocol stack. Users can use the module to add networking capabilities to

existing devices, or they can use it to build separate network controllers. Built-in high-speed

buffer memory improves system performance and reduces memory requirements。

XR-50B WIFI module

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1.1 Appearance dimensions

XR-50B WIFI module

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1.2 Characteristic

◼IEEE 802.11b/g/n, 1x1 SISO 2.4GHz

◼Built-in ARM Cortex-M4F 32bit MCU with main frequency up to

384MHz, support RTOS

◼Built-in 416KB SRAM , 160KB ROM and 4M PSRAM

◼Support external Flash and eXecute In Place(XIP)

◼8 shared universal DMA channels

◼Built-in 8-way 12bit resolution SAR type AD converter

◼Integrated WiFi MAC/ BB/RF/PA/LNA

◼Support WEP, WPA/WPA2, WPS2.0

◼Support UART/GPIO/ADC/PWM/I2C/I2S interface

◼Support AES/DES/3DES/SHA/MD5/CRC encryption engine

◼Support STA/AP/STA+AP mode

◼Support Smart Config/AirKiss（WeChat）One-click distribution

network

◼Support Local firmware upgrade using UART and remote upgrade

（FOTA）

◼Has universal and friendly AT command set

◼Support secondary development, support Windows, Linux

development environment

◼On-board AC107 audio CODEC circuit, support for polar

microphones

XR-50B WIFI module

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◼On-board DC/DC power supply module for lower power

consumption

1.3 Key parameter

Table1.1 Description

Model

XR-50B

Package

SMD40

Size

29*19*3(±0.2)mm

Certification

FCC、CE、IC、REACH、RoHS

SPI Flash

32Mbit（default）

Interface

UART/GPIO/ADC/PWM/I2S/SPI/SDIO/DVP/PDM

IO

26

UART baud

9600/19200/38400/115200/921600 bps

Freq. range

2400~2483.5MHz

Antenna

Type

Onboard/IPEX

TX power

802.11b: 17±2 dBm (@11Mbps)

802.11g: 15±2 dBm (@54Mbps)

802.11n: 14±2 dBm (@HT20, MCS7)

XR-50B WIFI module

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RX

sensitivity

CCK, 1 Mbps : -96dBm

CCK, 11 Mbps: -91dBm

6 Mbps (1/2 BPSK): -91dBm

54 Mbps (3/4 64-QAM): -75dBm

HT20, MCS7 (65 Mbps, 72.2 Mbps): -72dBm

Power

dissipation

(Typical)

RX Active(MCU active, DC-DC mode):44mA

TX Active(MCU active, DC-DC mode):

196mA@11n MCS7 15dBm

227mA@11b CCK 17dBm

Standby: ~43uA

Hibernation: ~5uA

Shutdown: ~0.5uA

Security

WEP/WPA-PSK/WPA2-PSK/WPS2.0

Power

supply

2.7V ~ 5.5V，>600mA

Operating

temp.

-40 ℃ ~ 85℃

Storage

condition

-65 ℃ ~ 150℃,< 90%RH

XR-50B WIFI module

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2、Pin definition

XR-50B has 40 pins，definitions are shown in Figure 2.1 and Table 2.2.

Figure 2.1 XR-50B Pin diagram

Table 2.2 Pin function description

Number

Name

Functions

1

TX0

UART0_TX；JTAG_TMS；PWM4/ECT4；SWD_TMS；EINTB0

2

RX0

UART0_RX；JTAG_TCK；PWM5/ECT5；SWD_TCK；EINTB1

3

GND

Ground

4

PA0

SPI1_MOSI ；SD_CMD；TWI1_SCL；CSI_D0；EINTA0

5

PA1

SPI1_MISO；SD_DATA0 ；TWI1_SDA；CSI_D1；EINTA1

6

PA2

SPI1_CLK ；SD_CLK ；CSI_D2；UART0_TX；EINTA2

XR-50B WIFI module

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7

PA3

SPI1_CS0；SD_DATA1；CSI_D3; UART0_RX；EINTA3

PA18; TWI0_SDA; IR_TX; FEM_CTRL2; IR_RX; EINTA18

8

GND

Ground

9

PB3

SWD_TCK; JTAG_TDI; PWM7/ECT7 ;FLASH_HOLD/IO ；

EINTB3

10

PB2

SWD_TMS; JTAG_TD0 ;PWM6/ECT6; FLASH_WP/IO2 ；

EINTB2

11

PB16

SD_CMD;EINTB16

12

PB17

SD_DATA0;EINTB17

13

PB18

SD_CLK;EINTB18

14

GND

Ground

15

LOUTP

Audio DAC output p

16

AGND

Analog ground

17

MBIAS1

MIC1 Bias voltage output

18

MIC1-

19

MIC1+

20

MBIAS2

MIC2 Bias voltage output

21

LINEINP

line-in input p

22

LINEINN

line-in input n

23

AGND

Analog ground

XR-50B WIFI module

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24

MIC2+

25

MIC2-

26

PA7

UART1_TX;SPI1_CS2;TWI0_SDA;CSI_D7;WUPIO3;EINTA7

27

GND

Ground

28

PA6

UART1_RX;SPI1_CS1;TWI0_SCL;CSI_D6;WUPIO2;EINTA6

29

PA5

UART1_CTS;SD_DATA3;TWI0_SDA;CSI_D5;WUPIO1;EINTA5

30

PA4

UART1_RTS;SD_DATA2;TWI0_SCL;CSI_D4;WUPIO0;EINTA7

31

PA11

ADC_CH1;PWM3/ECT3;DMIC_DATA;CSI_VSYNC;EINTA11

32

PA10

ADC_CH0;PWM2/ECT2;DMIC_CLK;CSI_HSYNC;EINTA10

33

PA9

FEM_CTRL2;PWM1/ECT1;TWI1_SDA;CSI_MCLK;EINTA9

34

PA8

FEM_CTRL1;PWM0/ECT0;TWI1_SCL;CSI_PCLK;EINTA8

35

PA16

ADC_CH6;IR_RX ;I2S_LRCLK;UART1_RTS;EINTA16

36

GND

Ground

37

PA15

ADC_CH5;PWM7/ECT7;I2S_DO; UART1_CTS;EINTA15

38

PA14

ADC_CH4 ；PWM6/ECT6 ；I2S_DI ；UART1_RX;EINTA14

39

RST

Reset

40

VCC

Power supply input，2.7~5.5V

XR-50B WIFI module

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Table 2.3 Boot mode

mode

RST

PB2

PB3

download

Rising edge

Low

operating

Rising edge

Low

High

Low

High

Notice：PB2 and PB3 has been pulled up in module, module has

self-reset function

3. Electrical parameters

3.1 Characteristic

Item

Conditon

Min.

Typ.

Max

Unit

Storage temp.

-

-65

Noraml

150

℃

Operating

temp.

-

-40

20

85

℃

Max. welding

temp.

IPC/JEDEC J-STD-020

-

260

℃

Power supply

VCC

2.7

3.3/5

5.5

V

I/O

VIL

VDD_IO=3.3V

-0.3

-

1.32

V

VIH

VDD_IO=3.3V

2.06

-

3.6

V

XR-50B WIFI module

Page 11 of 17

3.2WiFiRF Characteristic

VCC=3.3V, VDD_ANA =1.8V, XTAL=40MHz,温度=25℃

Item

Min.

Typ.

Max.

Unit

Frequency

2400

-

2483.5

MHz

Reflection value

-

-10

dB

Transmit Power

CCK, 1 Mbps

17.05

17.34

-

dBm

CCK, 11.0 Mbps

16.62

17.07

-

dBm

6 Mbps OFDM

16.03

16.55

-

dBm

54Mbps OFDM

15.67

16.34

-

dBm

HT20, MCS0

14.34

15.88

-

dBm

HT20, MCS7

14.58

15.74

-

dBm

VOL

VDD_IO=3.3V,|IOL|=7.5

~50 mA

-0.3

-

0.4

V

VOH

VDD_IO=3.3V,|IOL|=7.5

~50 mA

2.9

-

3.6

V

XR-50B WIFI module

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EVM

CCK, 1 Mbps

-19.78

-19.91

-

dB

CCK, 11.0 Mbps

-18.71

-19.12

-

dB

6 Mbps OFDM

-21.23

-21.77

-

dB

54Mbps OFDM

-21.35

-22.41

-

dB

HT20, MCS0

-28.17

-28.48

-

dB

HT20, MCS7

-28.86

-30.22

-

dB

Receiver sensitivity

CCK, 1 Mbps

-

-96

-

dBm

CCK, 11 Mbps

-

-91

-

dBm

6 Mbps

-

-91

-

dBm

54 Mbps

-

-75

-

dBm

HT20, MCS0

-

-91

-

dBm

HT20, MCS7

-

-72

-

dBm

XR-50B WIFI module

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3.3 Audio codec

VCC=3.3V, VDD_ANA=1.8V,temperature=25℃,ADC performance

Item

Conditon

Performance

Min.

Typ.

Max.

Unit

Full-Scale Input Level

PGAGain=0dB@THD<-40dB

-

1.75

-

Vrms

SNR (A-weighted)

PGA Gain=0dB

-

100

-

dB

THD+N (-3dBFS 1KHz

input)

-

-90

-

dB

SNR (A-weighted)

PGA Gain=24dB

-

94

-

dB

THD+N (-3dBFS 1KHz

input)

-

-91

-

dB

SNR (A-weighted)

PGA Gain=36dB

-

84

-

dB

THD+N (-3dBFS 1KHz

input)

-

-81

-

dB

VCC=3.3V, VDD_ANA=1.8V, temperature=25℃,Line-in performance

Item

Condition

Performance

Min.

Typ.

Max.

Unit

Full-Scale Input Level

PGAGain=0dB@THD<-40dB

-

1.8

-

Vrms

SNR (A-weighted)

PGA Gain=0dB

-

99

-

dB

XR-50B WIFI module

Page 14 of 17

THD+N (-3dBFS

1KHz input)

-

-89

-

dB

SNR (A-weighted)

PGA Gain=24dB

-

91

-

dB

THD+N (-3dBFS

1KHz input)

-

-69

-

dB

VCC=3.3V, VDD_ANA=1.8V, temperature=25℃,DAC performance

Item

Condition

Performance

Min.

Typ.

Max.

Unit

Full-Scale Output

Level

RLoad=100K

-

0.856

-

Vrms

SNR (A-weighted)

-

99

-

dB

THD+N (-3dBFS 1KHz

input)

-

-87

-

dB

3.4 Power dissipation

XR872, 25℃, VCC=3.3V,VDD_ANA=1.8V, MCU 384MHz

Mode

MCU

State

WLAN

State

TX/RX

Test condition

Min.

Typ.

Max.

Unit

ACTIVE

Active

TX

1M DSSS

17dBm

-

217.0

-

mA

11M

CCK

17dBm

-

226.6

-

mA

6M

OFDM

16dBm

-

214.0

-

mA

XR-50B WIFI module

Page 15 of 17

54M

OFDM

16dBm

-

218.0

-

mA

HT20,M

CS0

16dBm

-

201.3

-

mA

HT20,M

CS7

15dBm

-

196.0

-

mA

RX

1M DSSS

-

40.0

-

mA

11M CCK

-

42.0

-

mA

54M OFDM

-

48.5

-

mA

HT20,MCS0

-

48.3

-

mA

HT20,MCS7

-

48.0

-

mA

STANDBY

Sleep

Active

TX

1M

DSSS,nu

ll frame

17dBm

-

217.0

-

mA

RX

RX listen

-

40.0

-

mA

1M DSSS

-

32.5

-

mA

PS

Mode

RX

DTIM1

-

1031.

0

-

uA

DTIM3

-

428.0

-

uA

DTIM8

-

186.0

-

uA

DTIM10

-

154.0

-

uA

OFF

-

43.0

-

uA

HIBERNATI

ON

OFF

-

5.0

-

uA

SHUTDOW

N

OFF

-

0.5

-

uA

Notice：

◼ACTIVE mode，the power dissipation value is tested in MCU and WLAN activing.

◼STANDBY mode ，MCU is in sleep，can be awakened by peripherals。For example：When

the system has no task for a long time and needs to be connected to the network, close

most peripherals, retain the network communication capacity, and wake up the system for

processing as soon as possible when the data is received.

◼HIBERNATION mode retains only RTC, waiting for Timer or wake-up IO interrupt

XR-50B WIFI module

Page 16 of 17

4. Reflow welding temperature curve

5. Typical application

XR-50B WIFI module

Page 17 of 17

6. Contact Us

Address：A505 Room,Business Building,Suojia Science Park,Xixiang,Baoan District,Shenzhen

Telephone：0755-23220940

Website：www.aimachip.com

Shenzhen JiXinInteligence XR-50B User manual

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