CDW208821C Wi-Fi Module
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Specifications
- FCC ID: 2A9P9-CDW208821C
- IC: 29875-CDW208821C
- Product Name: Wi-Fi Module
- Model: CDW208821C
- Major Chipset: RTL8821CS
- Standard: 802.11a/b/g/n/ac
- Modulation Method:
BPSK/QPSK/16QAM/64QAM/256QAM/DBPSK/DQPSK/CCK - Frequency Band: 2.4GHz and 5GHz ISM Band
- WiFi Interface: SDIO3.0
- Humidity: 5% to 90% maximum
- Dimension: 12x12x2.1 (LxWxH) mm
Product Usage Instructions
1. Installation
Follow these steps to install the Wi-Fi Module CDW208821C:
- Ensure the host device is powered off.
- Locate the appropriate slot for the module on the host
device. - Carefully insert the module into the slot, aligning the pins
correctly. - Secure the module in place according to the host device’s
mounting mechanism. - Power on the host device and proceed with driver installation
if required.
2. Pin Description
The module has various pins with specific functions. Refer to
the user manual for detailed pin descriptions and connections.
3. Power Supply
The module requires a 3.3V supply voltage and I/O supply
voltage. Ensure proper power supply connections are made as per the
specifications.
4. Connectivity
After installation, configure the Wi-Fi settings on your device
to connect to available networks using the module.
Frequently Asked Questions (FAQ)
Q: What frequency bands does the Wi-Fi Module support?
A: The Wi-Fi Module supports both 2.4GHz and 5GHz ISM Bands for
wireless connectivity.
Q: What is the modulation method used by the Wi-Fi Module?
A: The Wi-Fi Module uses various modulation methods including
BPSK, QPSK, 16QAM, 64QAM, 256QAM, DBPSK, DQPSK, and CCK.
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Wi-Fi Module CDW208821C
Installations User Manual 1. Overview
The CDW208821C is a single-die wireless local area network (WLAN) solution to support 1 × 1 IEEE 802.11a/b/g/n/ac WLAN standards, enabling seamless integration of WLAN technology.
2. Label
3. Features
Supports a low-power SDIO 3.0 interface for WLAN Provides a highly integrated WLAN system-on-chip (SoC) for 5 GHz
802.11ac, or 2.4 GHz/5 GHz 802.11n WLAN applications Support WLAN 2.4GHz and 5GHz band channels Supports a single-ended RF port for cleaner and lower cost design Supports 20 MHz/40 MHz at 2.4 GHz and supports 20 MHz, 40 MHz, or
80 MHz at 5 GHz Supports multiuser MIMO
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Wi-Fi Module CDW208821C
4. General Specification
FCC ID:
2A9P9-CDW208821C
IC:
29875-CDW208821C
Poduct Name:
Wi-Fi Module
Model:
CDW208821C
Major Chipset:
RTL8821CS
Standard:
802.11a/b/g/n/ac
Modulation Method:
BPSK/QPSK/16QAM/64QAM/256QAM/DBPSK/DQPSK/CCK
Frequency Band:
2.4GHz and 5GHz ISM Band
WiFi Interface:
SDIO3.0
Operating Temperature: -20° C ~ 65° C
Storage Temperature: -40° C ~ 85°C
Humidity:
5% to 90% maximum
Dimension:
12x12x2.1 (LxWxH) mm
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5. Electriacl Characteristics
Symbol VDD
VDDIO VDD
Parameter 3.3V supply voltage I/O supply voltage 3.3V rating current
Minimum 3.0 1.62 —
Typical 3.3
1.8 or 3.3 —
Wi-Fi Module CDW208821C
Maximum 3.6 3.46 1000
Units V V mA
6. Physical Dimensions
(Unit: mm)
44 1
12±0.2
34 33
2.1±0.2
1.9±0.2
1.50
44 1
12±0.2
34 33
0.50 1.0
12±0.2
0.90
12±0.2
With shield cover
11 12
TOP VIEW
23 22
SIDE VIEW
1.00 11
12
0.50
1.50
1.50
0.90
TOP VIEW
23 22
1.50
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7. Pin Description
1 GND1
2 WL_BT_ANT
3 GND2
4 NC1
5 NC2
6 HOST_WAKE_BT
7 BT_HOST_WAKE
8 NC3
9 VDD
10 NC4
11 NC5
4 4 UART_CTS_N
43 UART_RXD
42 UART_TXD
41 UART_RTS_N
40 DEBUG_RXD
39 DEBUG_TXD
38 NC13
37 NC12
36 GND6
35 NC11
34 BT_EN
Wi-Fi Module CDW208821C
33 GND5
32 NC10
31 GND4
30 NC9
29 NC8
28 PCM_SY NC
27 PCM_IN
26 PCM_CLK
25 PCM_OUT
24 LPO
23 NC7
12 WLAN_EN
13 WL_HOST_WAKE
14 SDIO_DATA_2
15 SDIO_DATA_3
16 SDIO_DATA_CMD
17 SDIO_DATA_CLK
18 SDIO_DATA_0
19 SDIO_DATA_1
20 GND3
21 NC6
22 VDDIO
NO.
Name
1
GND
2
RF
3
GND
4
NC
5
NC
6
HOST_WAKE_BT
7
BT_WAKE_HOST
8 NC
9
VDD
10
NC
11
NC
12
WLAN_EN
13
WL_HOST_WAKE
14
SD_DAT2
15
SD_DAT3
Type — I/O — — — I O —
P — — I O I/O I/O
Description Ground connections RF I/O port (2.4G and 5G) Ground connections No connect No connect HOST wake up Bluetooth device(GPIO13) Bluetooth device to wake Host(GPIO14) No connect (SDIO_INT_OOB/TEST_MD_SEL) (GPIO4) 3.3V INPUT No connect No connect Enable pin for WLAN device(GPIO9) WL_WAKE_HOST(GPIO10) SDIO DATA2 SDIO DATA3
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16
SD_CMD
17
SD_CLK
18
SD_DAT0
19
SD_DAT1
20
GND
21
NC
22
VDDIO
23
NC
24
LPO
25
PCM_OUT
26
PCM_CLK
27
PCM_IN
28
PCM_SYNC
29
NC
30
NC
31
GND
32
NC
33
GND
34
BT_EN
35
NC
36
GND
37
NC
38
NC
39
DEBUG_TXD
40
DEBUG_RXD
41
UART_RTS_N
42
UART_TXD
43
UART_RXD
44
UART_CTS_N
Wi-Fi Module CDW208821C
I/O SDIO command line I/O SDIO CLK I/O SDIO DATA0 I/O SDIO DATA1 — Ground connections — No connect P I/O Voltage supply input 1.8V or 3.3V — No connect
I 32.768KHz input(EECS) O PCM data output I/O PCM CLK I PCM data input I PCM sync signal — No connect — No connect(Share 26MHz_IN) — Ground connections — No connect — Ground connections I Enable pin for Blutooth device(GPIO11) — No connect(Share VBAT_EN) — Ground connections — No connect — No connect — No connect — No connect I Bluetooth UART interface O Bluetooth UART interface I Bluetooth UART interface I Bluetooth UART interface
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8. Recommended Reflow Profile
Referred IPC/JEDEC standard. Peak Temperature: <250°C Number of Times: 2s
Wi-Fi Module CDW208821C
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9. Packing information
Wi-Fi Module CDW208821C
28±2mm
Vacuum
AL BAG ANTI-STATIC
Color of plastic disc: blue A roll of 1500pcs(Leave the front and back blank 20pcs)
inner box K3K: 33.5cm*34.7cm*7cm A box of 1500 PCS
carton K=A: 36.4*35.7*37.5cm A case of 7500 PCS
ESD CAUTION
The CDW208821C is ESD (electrostatic discharge) sensitive device and may be damaged with ESD or spike voltage. Although CDW208821C is with built-in ESD protection circuitry, please handle with care to avoid the permanent malfunction or the performance degradation.
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The module is limited to OEM installation only.
Wi-Fi Module CDW208821C
This product is mounted inside of the end product only by professional installers OEM. They use this module with changing the power and control signal setting by software of end product within the scope of this application. End user cannot change this setting.
This device is intended only for OEM integrators under the following conditions: 1) The antenna must be installed such 20cm is maintained between the antenna and users, the antenna specification listed below:
Ant. Type
Operation Frequencies (MHz) /Max. Ant. Gain (dBi) 2400~2500 5150~5250 5250~5350 5470~5725 5725~5850
Bunghol mushrooms
2.48
1.72
1.81
2.52
1.61
2) The transmitter module may not be co-located with any other transmitter or antenna.
As long as these two conditions are met, further transmitter test will not be required. However, integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.
The OEM integrator has to be aware no to provide information to the end user regarding how to install or remove this RF module in the user manual of the end product with integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.
If the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module.
This exterior label can use wording such as the following: “Contains Transmitter Module FCC ID: 2A9P9-CDW208821C”
When the module is installed inside another device, the user manual of this device must contain below warning statement:
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Wi-Fi Module CDW208821C
Frederal Communication Commission Interference 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.
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 generate, 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. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: — Reorient or relocate the receiving antenna. — Increase the separation between the equipment and receiver. — Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected. — Consult the dealer or an experienced radio/TV technician for help.
Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.
Caution: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. That separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and different antenna configurations.
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Wi-Fi Module CDW208821C
ISED Warning: If the IC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following:
“Contains Transmitter Module IC: 29875-CDW208821C”
When the module is installed inside another device, the user manual of this device must contain below warning statements:
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:
(1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause
undesired operation of the device.
Le présentappareilestconforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence. L’exploitationestautorisée aux deux conditions suivantes:
(1)l’appareil ne doit pas produire de brouillage, et (2) l’utilisateur de l’appareildoit accepter tout brouillageradioélectriquesubi, mêmesi le
brouillageest susceptible d’encompromettre le fonctionnement.
This radio transmitter (identify the device by certification number or model number if Category II) has been approved by Industry Canada to operate with the antenna types listed below with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Le présent émetteur radio (identifier le dispositif par son numéro de certification ou son numéro de modèle s’il fait partie du matériel de catégorie II) a été approuvé par Industrie Canada pour fonctionner avec les types d’antenne énumérés ci-dessous et ayant un gain admissible maximal. Les types d’antenne non inclus dans cette liste, et dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l’exploitation de l’émetteur.
Ant. Type Bunghol mushrooms
Operation Frequencies (MHz) /Max. Ant. Gain (dBi)
2400~2500 5150~5250 5250~5350 5470~5725 5725~5850
2.48
1.72
1.81
2.52
1.61
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Wi-Fi Module CDW208821C
The device has been evaluated to meet general RF exposure requirement. To maintain compliance with RSS-102 — Radio Frequency (RF) Exposure guidelines, this equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. le dispositif de a été évalué à répondre général rf exposition exigence.pour maintenir la conformité avec les directives d’exposition du RSS-102-Radio Fréquence (RF). ce matériel doit être installé et exploité à une distance minimale de 20 cm entre le radiateur et votre corps. Note: 5.2G band is restricted to indoor use only. La bande de 5.2G est limitée à l’usage d’intérieur seulement.
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Documents / Resources
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BOTINKIT CDW208821C Wi-Fi Module [pdf] User Manual CDW208821C Wi-Fi Module, CDW208821C, Wi-Fi Module, Module |