User's Manual

WF-U21DS-
SSA1
IEEE 802.11a/b/g/n/ac 2T2R SDIO WIFI Module
&BT2.1+EDR/4.2/5.1
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Sichuan AI-Link Technology Co.,Ltd. page 4 of 20
1. Introduction
WF-U21DS-SSA1 module design is based on UWE5621DS solution.
UWE5621DS is a highly integrated
2-in-1 connectivity single chip for PC, STB, OTT, industrial control and automotive applications.
This chip
includes 2.4 GHz and 5 GHz WLAN IEEE 802.11 a/b/g/n/ac 2x2 MU-MIMO 20/40/80 MHz
VHT R2
MAC/PHY/Radio, Bluetooth 5.1 Smart Ready compliant with supporting high power mode, Mesh,
Direction Finding and Long Range. Additionally, this radio-on-a-chip integrates power amplifiers,
receive
low noise amplifiers and RF TR switch.It supports high-speed 4-wire UART and SDIO 3.0 for Wi-
Fi and
Bluetooth.
1.1 RF module Overview
The general HW architecture for the module is shown in Figure 1.
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Figure 1 WF-U21DS-SSA1 Block Diagram
1.2 Specification reference
This specification is based on additional references listed below.
_ IEEE Std. 802.11a
_ IEEE Std. 802.11b
_ IEEE Std. 802.11g
_ IEEE Std. 802.11n
_ IEEE Std. 802.11ac
_ Bluetooth 2.1+EDR/4.2/5.1
1.3 System Functions
Table1: General Specification as below:
Main Chipset
UWE5621DS
Operating Frequency
2.4G/5G
WiFi Standard
802.11
a/b/g/n/ac (2x2)
Bluetooth
2.1+EDR/4.2/5.1