Contents hide
1 CVTE Ax 2T2R USB WiFi Module
2 Introduction
3 Features
4 Block Diagram
5 Package Outline and Mounting
6 Interface Timing Specification
7 Documents / Resources
7.1 References
8 Related Posts

CVTE-logo

CVTE Ax 2T2R USB WiFi Module

CVTE-Ax-2T2R-USB-WiFi-Module-product-image

 

Introduction

  • SKI.WB921AU.1 module is based on MediaTek MT7921AU solution.
  • MT7921A is a highly integrated single chip which features a low power 2×2 lla/b/g/n/ac/ax dual-band Wi-Fi subsystem and a Bluetooth vS.2 subsystem, offering feature-rich wireless connectivity at high standards ,and delivering reliable ,cost-effective throughput from an extended distance.
  • MT7921AUN data rate up to 800Mbps with USB3.0.Optimized RF architecture and baseband algorithms provide superb performance and low power consumption. Intelligent MAC design deploys a high efficient offload engine ,and hardware data processing accelerators which fully offloads Wi-Fi task of the host processor, MT7921A is designed to support standard based features in the areas of security, quality of service and international regulations, giving end users the greatest performance any time and in any circumstance. This documentation describes the engineering requirements specification.

Features

Reserving System IEEE Std. 802.lla
IEEE Std. 802.llb
IEEE Std. 802.llg
IEEE Std. 802.lln IEEE Std. 802.llac

IEEE Std. 802.llax(SGHz)
IEEE Std. 802.11ax(6GHz)
BT 2.l+EDR
BT4.2
BT 5.2 with BLE (BT low energy)
Chip Solution MT7921AU
 

Band & occupied band widthilt

 BT: 2400-2483.SMHz@:;c;3MHz WiFi:2400-2483.SMHz@:;c;4QMHz

5150-5350MHz@:;c;8QMHz

5725-5850MHz@:;c;8QMHz
 

Modulation  system

 WiFi: DBPSK/DQPS K/CCK/BPS K/QPSK/ 16QAM/64QAM/256QAM/1024Q AM

BT:GFSK, n/4-DQPSK, 8-DPSK
Dimensions        R-r 30mmx23mmx2.6mm
Model Installation Mode Protocol I Frequency Antenna Remark
SKI.WB921AU.1 SMD IEEE 802.1la/b/g/n/ac/ax

BT 2.l+EDR/4.2/5.2

 2.4GHz/5GHz

/6GHz

 WiFi & BT: Ipex 30mmx23mm

X2.6mm

Block Diagram

CVTE-Ax-2T2R-USB-WiFi-Module-image (1) CVTE-Ax-2T2R-USB-WiFi-Module-image (2) CVTE-Ax-2T2R-USB-WiFi-Module-image (11)

Figure 1 SKI.WB921AU.1 Block Diagram

Package Outline and Mounting

CVTE-Ax-2T2R-USB-WiFi-Module-image (4)

Pin Definition

CVTE-Ax-2T2R-USB-WiFi-Module-image (5)
PIN SYMBOL DESCRIPTION
1 GND GND
2 NC Not connect
3 NC Not connect
4 GND GND
5 RESET PMU RESET
6 GND GND
7 GND GND
8 3.3V 3.3V
9 3.3V 3.3V
10 GND GND
11 NC Not connect
12 NC Not connect
13 GPI013 DEBUG,WL FW LOG
14 GPI04 DEBUG,BT FW LOG
15 GND GND
16 WIFI_WAKE WIFI
17 GPIO12 ICE DEBUG
18 Gili ICE DEBUG
19 NC Not connect
20 GND GND
21 U3-TXN USB3.0 TXN,
22 U3-TXP USB3.0 TXP,;
23 GND GND
24 NC Not connect
25 NC Not connect
26 GND GND
27 U3-RXN USB3.0
28 U3-RXP USB3.0
29 GND GND
30 U2-DP USB2.0 DP,
31 U2-DM USB2.0 DM,
32 GND GND
33 NC Not connect
34 BT_WAKE BT
35 NC/BT_Stereo Not connect/BT_Stereo
36 NC Not connect
37 GND GND
38 NC Not connect
39 NC Not connect
40 NC Not connect
41 NC Not connect
42 GND GND
43 GND GND
44 GND GND
45 WiFi1 Not connect (ipex)
46 GND GND
47 GND GND
48 WiFi0 Not connect(ipex)
49 GND GND
50 GND GND
51 BT! Not connect( ipex)
52 GND GND
53 GND GND
54 BT0 Not connect(ipex)
55 GND GND

Product Pictures

CVTE-Ax-2T2R-USB-WiFi-Module-image (6)

 (top view)

CVTE

CVTE ‘l4
SKLWB921AU,1 1:  002.029.0000435 IPEX 1: 4       . 2WiFi+2 BT  USB3,0-5G
 2:  002,029.0000436 IPEX : 3       . 2WiFi+1BT. BT0, ± BT) , USB3,0-5G
‘ 3:   002.029.0000874 : 4  t . 2WiFi+2 BT USB3.0-5G
4,  002.029.0000969 IPEX 1: 4       . 2WiFi+2 BT , USB3,0-2.5G
5, 002.029.0000995 IPEX 1\: 4       . 2WiFi+2 BT ‘, USB3,0-5G(xt.\’ BT_Stereo)

CVTE-Ax-2T2R-USB-WiFi-Module-image (7)

(bottom view)

CVTE-Ax-2T2R-USB-WiFi-Module-image (8)

(information view)

Key Materials 

1 MT7921AU 109-DRQFN
2 PCB SKI.WB921AU.1 FR-4,4LAY
3 CF4040M00006T2115218 40MHz

CVTE-Ax-2T2R-USB-WiFi-Module-image (9)

The device is restricted to indoor use when operating in 5150-5350MHz frequency range.

General Requirements 

No. Feature Description
7-1 Operation Voltage 3.3V+/-0.3
7-2 Current Consumption 900mA  2A)
7-3 Ripple ,S120mV
7-4 Operation Temperature -10°C to + 70°C
7-5 Antenna Type External antenna
7-6 USB High Speed USB 3.0 Interface

High Speed USB 2.0 Interface)
7-7 Storage Temperature Zf.1it1llli.& -40°C to +125°C

Interface Timing Specification

CVTE-Ax-2T2R-USB-WiFi-Module-image (10)

Ps:

  1. After 3.3V power supply is stabilized, PMU_EN can be pulled up again (Delta 1>0);
  2. It is recommended that the main chip be pulled down again PMU _ EN after the WIFI power is stabilized.

Electrical Characteristics 
The Test for electrical specification was performed under the following condition unless otherwise specified:

  • Ambient condition Temperature :25’C ± S’C;
  • Power supply voltages, 3.3V+/-0.3 input power at the Module;

IEEE 802.llb Section(2.4GHz)

Items Contents
Specification IEEE802.11b
Mode CCK
Channel CH1 to CH13
TX Characteristics Min. Typ. Max. Unit Remark
1. Power Levels(Calibrated)
1) For antenna port ( CCK 11 M) 15 17 19 dBm
2. Spectrum Mask @ target power
1) fc +/-11MHz to +/-22MHz -30 dBr
2) fc > +/-22MHz -50 dBr
3 Constellation Error(EVM)@ target power
1) !Mbps -10 dB
2) 2Mbps -10 dB
3) 5.5Mbps -10 dB
4) 11Mbps -10 dB
4. Frequency Error -20 20 ppm
RX Characteristics Min. Typ. Max. Unit
5 Minimum Input Level Sensitivity

(each chain)
1) !Mbps (FER ;£8%) -83 dBm
2) 2Mbps (FER ;£8%) -80 dBm
3) 5.5Mbps (FER ;£8%) -79 dBm
4) 11Mbps (FER ;£8%) -76 dBm
6 Maximum Input Level (FER ;£8%) -10 dBm

IEEE 802.llg Section(2.4GHz)

Items Contents
Specification IEEE802.11g
Mode OFDM
Channel CH1 to CH13
TX Characteristics Min. Typ. Max. Unit Remark
1. Power Levels
1) For antenna port ( 54M) 14 16 18 dBm
2. Spectrum Mask @ target power
1) at fc +/-11MHz -20 dBr
2) at fc +/-20MHz -28 dBr
3) at fc > +/-30MHz -40 dBr
3 Constellation Error(EVM)@ target power
1) 6Mbps -5 dB
2) 9Mbps -8 dB
3) 12Mbps -10 dB
4) 18Mbps -13 dB
5) 24Mbps -16 dB
6) 36Mbps -19 dB
7) 48Mbps -22 dB
8) 54Mbps -25 dB
4 Frequency Error -20 20 ppm
RX Characteristics Min. Typ. Max. Unit
5 Minimum Input Level Sensitivity

(each chain)
1) 6Mbps (PER ;£10%) -85 dBm
2) 9Mbps (PER ;£10%) -84 dBm
3) 12Mbps (PER ;£10%) -82 dBm
4) 18Mbps (PER ;£10%) -80 dBm
5) 24Mbps (PER ;£10%) -77 dBm
6) 36Mbps (PER ;£10%) -73 dBm
7) 48Mbps (PER ;£10%) -69 dBm
8) 54Mbps (PER ;£10%) -65 dBm
6 Maximum Input Level (PER ;£10%) -20 dBm

IEEE 802.lln HT20 Section(2.4GHz)

Items Contents
Specification IEEE802.lln HT20@ 2.4GHz
Mode OFDM
Channel CHl to CH13
TX Characteristics Min. Typ. Max. Unit
1. Power Levels
1) For antenna port ( MCS7) 13 15 17 dBm
2. Spectrum Mask @ target power
1) at fc +/-llMHz -20 dBr
2) at fc +/-20MHz -28 dBr
3) at fc > +/-30MHz -45 dBr
3. Constellation Error(EVM)@ target power
1) MCS0 -5 dB
2) MCSl -10 dB
3) MCS2 -13 dB
4) MCS3 -16 dB
5) MCS4 -19 dB
6) MCS5 -22 dB
7) MCS6 -25 dB
8) MCS7 -28 dB
4. Frequency Error -20 20 ppm
RX Characteristics Min. Typ. Max. Unit
5.Minimum Input Level Sensitivity

(each chain)
1) MCS0 (PER10%) -82 dBm
2)MCSl (PER10%) -79 dBm
3)MCS2 (PER10%) -77 dBm
4)MCS3 (PER10%) -74 dBm
5)MCS4 (PER10%) -70 dBm
6)MCS5 (PER10%) -66 dBm
7)MCS6 (PER10%) -65 dBm
8)MCS7 (PER10%) -64 dBm
7.Maximum Input Level (PER10%) -20 dBm

IEEE 802.lln HT40 Section(2.4GHZ)

Items Contents
Specification IEEE802.lln HT40@ 2.4GHz
Mode OFDM
Channel CH3 to CHll
TX Characteristics Min. Typ. Max. Unit
1. Power Levels (Calibrated)
1) For antenna port ( MCS7) 13 15 17 dBm
2. Spectrum Mask @target power
1) at fc +/-22MHz -20 dBr
2) at fc +/-40MHz -28 dBr
3) at fc > +/-60MHz -45 dBr
3. Constellation Error(EVM)@ target power
1) MCS0 -5 dB
2) MCSl -10 dB
3) MCS2 -13 dB
4) MCS3 -16 dB
5) MCS4 -19 dB
6) MCS5 -22 dB
7) MCS6 -25 dB
8) MCS7 -28 dB
4. Frequency Error -20 20 ppm
RX Characteristics Min. Typ. Max. Unit
5. Minimum Input Level Sensitivity

(each chain)
1) MCS0 (PER10%) -79 dBm
2)MCSl (PER10%) -76 dBm
3)MCS2 (PER10%) -74 dBm
4) MCS3 (PER ;£10%) -71 dBm
5) MCS4 (PER ;£10%) -67 dBm
6) MCS5 (PER ;£10%) -63 dBm
7) MCS6 (PER ;£10%) -62 dBm
8) MCS7 (PER ;£10%) -61 dBm
6. Maximum Input Level (PER ;£10%) -20 dBm

IEEE 802.llax Section(2.4GHz)

Items Contents
Specification IEEE802. l lax
 

Mode

 BPSK, QPSK, 16QAM, 64QAM,256QAM,

1024QAM and OFDMA
 

Channel

 HE20: CHl to CH13

HE40: CH3 to CHll
TX Characteristics Min. Typ. Max. Unit
1. Power Levels (Calibrated)
1) For antenna port ( MCSll) 11 13 15 dBm
2. Spectrum Mask @VHT20/VHT40/VHT80

target power
1) at fc +/-11MHz/21MHz/41MHz -20 dBr
2) at fc +/-20MHz/40MHz/80MHz -28 dBr
3) at fc +/-30MHz/60MHz/120MHz -40 dBr
3. Constellation Error(EVM)@ target power
1) MCS0 -5 dB
2) MCSl -10 dB
3) MCS2 -13 dB
4) MCS3 -16 dB
5) MCS4 -19 dB
6) MCS5 -22 dB
7) MCS6 -25 dB
8) MCS7 -27 dB
9) MCS8 -30 dB
10) MCS9 -32 dB
11) MCSl0 -34 dB
12) MCSll -35 dB
4. Frequency Error -20 20 ppm
RX Characteristics Min. Typ. Max. Unit
5.Minimum Input Level Sensitivity

(each chain)

 HE

20

 HE

40
1) MCS0 (PER ;£10%) -82 -79 dBm
2) MCSl (PER ;£10%) -79 -76 dBm
3) MCS2 (PER ;£10%) -77 -74 dBm
4) MCS3 (PER ;£10%) -74 -71 dBm
5) MCS4 (PER ;£10%) -70 -67 dBm
6) MCS5 (PER ;£10%) -66 -63 dBm
7) MCS6 (PER ;£10%) -65 -62 dBm
8) MCS7 (PER ;£10%) -64 -61 dBm
9) MCS8(PER ;£10%) -59 -56 dBm
10) MCS9(PER ;£10%) -57 -54 dBm
11) MCSl0(PER ;£10%) -54 -51 dBm
12) MCSll(PER ;£10%) -52 -49 dBm
6. Maximum Input Level (PER ;£10%) -30 dBm

IEEE 802.11a Section(SGHz)

Items Contents
Specification IEEE802. l la
Mode OFDM
Channel CH36 to CH165
TX Characteristics Min. Typ. Max. Unit
1. Power Levels (Calibrated)
1) For antenna port ( 54M) 14 16 18 dBm
2. Spectrum Mask @target power
1) at fc +/-llMHz -20 dBr
2) at fc +/-20MHz -28 dBr
3) at fc > +/-30MHz -40 dBr
3. Constellation Error(EVM)@ target power
1) 6Mbps -5 dB
2) 9Mbps -8 dB
3) 12Mbps -10 dB
4) 18Mbps -13 dB
5) 24Mbps -16 dB
6) 36Mbps -19 dB
7) 48Mbps -22 dB
8) 54Mbps -25 dB
4 Frequency Error -20 20 ppm
RX Characteristics Min. Typ. Max. Unit
5 Minimum Input Level Sensitivity

(each chain)
1) 6Mbps (PER ::;; 10%) -82 dBm
2) 9Mbps (PER ::;; 10%) -81 dBm
3) 12Mbps (PER ::;; 10%) -79 dBm
4) 18Mbps (PER ::;; 10%) -77 dBm

Documents / Resources

CVTE Ax 2T2R USB WiFi Module [pdf] Owner's Manual
Ax 2T2R, Ax 2T2R USB WiFi Module, USB WiFi Module, WiFi Module, Module

References

Related Posts

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