Datasheet RTL8188CUB8 Datasheet (Realtek Semiconductor)

RTL8188CUB8

Slim Module Combo Card User’s Manual

Rev. 1.0

07 Oct 2010

Realtek Semiconductor Corp.

No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
Tel.: [phone]. Fax: [phone]
www.realtek.com.tw

RTL8188CUB8

COPYRIGHT

©2010 Realtek Semiconductor Corp. All rights reserved. No part of this document may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any
means without the written permission of Realtek Semiconductor Corp.

DISCLAIMER

Realtek provides this document “as is”, without warranty of any kind, neither expressed nor implied,
including, but not limited to, the particular purpose. Realtek may make improvements and/or changes in
this document or in the product described in this document at any time. This document could include
technical inaccuracies or typographical errors.

TRADEMARKS

Realtek is a trademark of Realtek Semiconductor Corporation. Other names mentioned in this document are
trademarks/registered trademarks of their respective owners.

Slim Module Combo Card User Manual

USING THIS DOCUMENT

This document is intended for the software engineer’s reference and provides detailed programming
information.

Though every effort has been made to ensure that this document is current and accurate, more information
may have become available subsequent to the production of this guide. In that event, please contact your
Realtek representative for additional information that may help in the development process.

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Table of Contents

1. GENERAL DESCRIPTION................................................................................................................................................1

1.1. RTL8188CUS .................................................................................................................................................................1

1.2. BLUECORE CSR8510......................................................................................................................................................2

2. FEATURES...........................................................................................................................................................................2

2.1. RTL8188CUS .................................................................................................................................................................2

2.2. BLUECORE CSR8510......................................................................................................................................................3

PRODUCT SPECIFICATIONS .................................................................................................................................................4

2.3. CONNECTER PIN ASSIGNMENT.........................................................................................................................................4

2.4. MECHANICAL..................................................................................................................................................................5

2.5. ENVIRONMENTAL ............................................................................................................................................................6

2.5.1. Operating ...............................................................................................................................................................6

2.5.2. Storage....................................................................................................................................................................6

2.6. FUNCTIONAL SPECIFICATIONS.........................................................................................................................................7

2.7. WARNING........................................................................................................................................................................8

4.5.1 Federal Communication Commission Interference Statement......................................................................................8

4.5.2 Industry Canada Statement........................................................................................................................................10

4.5.3 NCC

警語

...................................................................................................................................................................11

List of Tables

TABLE 1. CONNECTER PIN ASSIGNMENT .................................................................................................................................4

TABLE 2. FUNCTIONAL SPECIFICATIONS .......................................................................................................................................7

List of Figures

FIGURE 1. RTL8188CUS SLIM MODULE MECHANICAL SPECIFICATION ......................................................................................5

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1. General Description

1.1. RTL8188CUS

The Realtek RTL8188CUS is a highly integrated single-chip Wireless LAN (WLAN) controller
compatible with the IEEE 802.11n specification. It combines a MAC, a 1T1R capable baseband, and RF in
a single chip. The RTL8188CUS provides a complete solution for a high-performance wireless client.

The RTL8188CUS baseband implements Multiple Input, Multiple Output (MIMO) Orthogonal Frequency
Division Multiplexing (OFDM) with one transmit and one receive path (1T1R). Features include one
spatial stream transmission, short Guard Interval (GI) of 400ns, spatial spreading, and support for both
20MHz and 40MHz channel bandwidth.

For legacy compatibility, Direct Sequence Spread Spectrum (DSSS), Complementary Code Keying (CCK)
and OFDM baseband processing are included to support all IEEE 802.11b, and 802.11g data rates.
Differential phase shift keying modulation schemes, DBPSK and DQPSK with data scrambling capability
are available, and CCK provides support for legacy data rates, with long or short preamble. The high speed
FFT/IFFT paths, combined with BPSK, QPSK, 16QAM, and 64QAM modulation of the individual
subcarriers, and rate compatible punctured convolutional coding with coding rate of 1/2, 2/3, 3/4, and 5/6,
provide higher data rates of 54Mbps and 150Mbps for IEEE 802.11g and 802.11n OFDM respectively.

The RTL8188CUS builds in an enhanced signal detector, an adaptive frequency domain equalizer, and a
soft-decision Viterbi decoder to alleviate severe multi-path effects and mutual interference in the reception
of multiple streams. Robust interference detection and suppression are provided to protect against
Bluetooth, cordless phone, and microwave oven interference.

Efficient IQ-imbalance, DC offset, phase noise, frequency offset, and timing offset compensations are
provided for the radio frequency front-end. Selectable digital transmit and receive FIR filters are provided
to meet transmit spectrum mask requirements and to reject adjacent channel interference, respectively.

The RTL8188CUS supports fast receiver Automatic Gain Control (AGC) with synchronous and
asynchronous control loops among antennas, antenna diversity functions, and adaptive transmit power
control functions to obtain better performance in the analog portions of the transceiver.

The RTL8188CUS MAC supports 802.11e for multimedia applications, 802.11i for security, and 802.11n
for enhanced MAC protocol efficiency. Using packet aggregation techniques such as A-MPDU with BA
and A-MSDU, protocol efficiency is significantly improved. Power saving mechanisms such as U-APSD,
and APSD, reduces power wasted during idle time, and compensates for the extra power required to
transmit OFDM. The RTL8188CUS provides simple legacy and 20MHz/40MHz co-existence mechanisms
to ensure backward and network compatibility.

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1.2. BlueCore CSR8510

CSR BlueCore CSR8510 WLCSP is a product from CSR’s Connectivity Centre . It is a single-chip
radio and baseband IC for Bluetooth 2.4GHz systems including EDR to 3Mbps.Dedicated signal and
baseband processing is included for full Bluetooth operation. CSR designed CSR8510 WLCSP to reduce
PCB area and the number of external components, including no requirement for an external balun.This
ensures that production costs are minimised.

2. Features

2.1. RTL8188CUS

General

 46-pin QFN
 CMOS MAC, Baseband PHY and RF in

a single chip for IEEE 802.11b/g/n
compatible WLAN

 75Mbps receive PHY rate and 75Mbps

transmit PHY rate using 20MHz
bandwidth

 150Mbps receive PHY rate and 150Mbps

transmit PHY rate using 40MHz
bandwidth

 Compatible with 802.11n specification
 Backward compatible with 802.11b/g

devices while operating at 802.11n data
rates

Host Interface

 USB Port

Standards Supported

 IEEE 802.11b/g/n compatible WLAN
 IEEE 802.11e QoS Enhancement

(WMM)

 IEEE 802.11i (WPA, WPA2). Open,

shared key, and pair-wise key
authentication services

2 Rev.1.0

MAC Features

 Frame aggregation for increased MAC

efficiency (A-MSDU, A-MPDU)

 Low latency immediate

High-Throughput Block
Acknowledgement (HT-BA)

 Long NAV for media reservation with

CF-End for NAV release

 PHY-level spoofing to enhance legacy

compatibility

 Power saving mechanism
 Channel management and co-existence
 Multiple BSSID feature allows the

RTL8188CUS to assume multiple MAC
identities when used as a wireless bridge

 Supports Wake-On-WLAN via Magic

Packet and Wake-up frame

 Transmit Opportunity (TXOP) Short

Inter-Frame Space (SIFS) bursting for
higher multimedia bandwidth

Peripheral Interfaces

 General Purpose Input/Output (8 pins)
 Three configurable LED pins
 Configurable Bluetooth Coexistence

Interface

PHY Features

RTL8188CUB8

Slim Module Combo Card User Manual

 IEEE 802.11n OFDM
 One Transmit and one Receive path

(1T1R)

 20MHz and 40MHz bandwidth

transmission

 Short Guard Interval (400ns)
 DSSS with DBPSK and DQPSK, CCK

modulation with long and short preamble

 OFDM with BPSK, QPSK, 16QAM, and

64QAM modulation. Convolutional
Coding Rate: 1/2, 2/3, 3/4, and 5/6

 Maximum data rate 54Mbps in 802.11g,

and 150Mbps in 802.11n

 Switch diversity for DSSS/CCK
 Hardware antenna diversity
 Selectable digital transmit and receive

FIR filters

 Programmable scaling in transmitter and

receiver to trade quantization noise
against increased probability of clipping

 Fast receiver Automatic Gain Control

(AGC)

 28-ball 2.57 x 3.21x0.6mm 0.5mm pitch

WLCSP Package , no underfill required

 Design optimized for low cost PCB

manufacture.

Host Interface

 USB Port

 On-chip ADC and DAC

2.2. BlueCore CSR8510

General

 Fully Qualified Bluetooth v3.0 system
 Full Speed Bluetooth Operation with Full

piconet and scatternet Support

 Low power selectable 1.2 to 3.6V I/O
 No external regulator required for USB

supply operation.

 Full-speed USB2.0 interface
 WLAN coexistence interface.

3 Rev.1.0

Product specifications

2.3. Connecter Pin Assignment

Table 1. Connecter Pin Assignment

Pin Pin definition Type Description

1 3.3V P 3.3V DC Power Supply
2 USB D+ I/O USB D+ for BT’s USB2.0
3 USB D- V USB D- for BT’s USB2.0
4 BT_Power_OFF V BT on: High; BT off: Low
5 GND G Ground
6 USB D+ I/O USB D+ for WiFi’s USB2.0
7 USB D- I/O USB D- for WiFi’s USB2.0
8 WiFi_Power_OFF I/O WiFi on: High; WiFi off: Low
9 W_B_LED I/O/ LED is active low.

10 GND G Ground

RTL8188CUB8

Slim Module Combo Card User Manual

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2.4. Mechanical

RTL8188CUB8

Slim Module Combo Card User Manual

Figure 1. RTL8188CUS Slim Module Mechanical Specification

5 Rev.1.0

2.5. Environmental

2.5.1. Operating

Operating Temperature: 0 to 70 °C
Relative Humidity: 5-90% (non-condensing)

2.5.2. Storage

Temperature: -55 to 125 °C
Relevant Humidity: 5-95% (non-condensing)

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Slim Module Combo Card User Manual

6 Rev.1.0

2.6. Functional Specifications

Table 2. Functional Specifications

WiFi:

IEEE 802.11b, IEEE 802.11g, Draft IEEE 802.11n, IEEE 802.11d,

Standards

Bus Interface WiFi: USB BT: USB
Form Factor

Data Rate

Media Access Control

Modulation Techniques

Network Architecture

Operating Channel

Frequency Range

Security

Operating Voltage

IEEE 802.11e, IEEE 802.11h, IEEE 802.11i

BT:

BT v3.0

Slim Module 6mm x 80mm

802.11b:

11, 5.5, 2, 1 Mbps;

802.11g:

54, 48, 36, 24, 18, 12, 9, 6 Mbps

802.11n:

MCS 0 to 7 for HT20MHz;
MCS 0 to 7 for HT40MHz

BT:

1/2/3 Mbps

WiFi:

CSMA/CA with ACK

WiFi + BT:

AFH, Time Division

802.11b:
CCK, DQPSK, DBPSK

802.11g:
64 QAM, 16 QAM, QPSK, BPSK

802.11n:
BPSK, QPSK, 16-QAM, 64-QAM

BT:
GFSK, π/4 DQPSK, 8DPSK
WiFi:

Ad-hoc mode (Peer-to-Peer )
Infrastructure mode

WiFi 2.4GHz:

11: (Ch. 1-11) – United States

13: (Ch. 1-13) – Europe
13: (Ch. 1-14) – Japan

BT 2.4GHz:

Ch. 0 ~78

2.400GHz ~ 2.4835 GHz

WiFi :

WPA, WPA-PSK, WPA2, WPA2-PSK, WEP 64bit & 128bit, IEEE

802.11x, IEEE 802.11i

BT:

Simple Paring

3.3 V ±9% I/O supply voltage

RTL8188CUB8

Slim Module Combo Card User Manual

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2.7. Warning

4.5.1 Federal Communication Commission Interference Statement

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. 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 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.

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.

FCC Caution: Any changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.

IMPORTANT NOTE:
FCC 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 & your
body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

IEEE 802.11b or 802.11g operation of this product in the U.S.A. is firmware-limited to channels 1 through

11.

This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20 cm is maintained between the antenna and users, and
The transmitter module may not be co-located with any other transmitter or antenna,
As long as 3 conditions above are met, further transmitter test will not be required. However, the OEM
integrator is still responsible for testing their end-product for any additional compliance requirements
required with this module installed (for example, digital device emissions, PC peripheral requirements,
etc.).

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RTL8188CUB8

IMPORTANT NOTE: In the event that these conditions can not be met (for example certain laptop
configurations or co-location with another transmitter), then the FCC authorization is no longer considered
valid and the FCC ID can not be used on the final product. In these circumstances, the OEM integrator will
be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC
authorization.

End Product Labeling
This transmitter module is authorized only for use in device where the antenna may be installed such that 20
cm may be maintained between the antenna and users. The final end product must be labeled in a visible
area with the following: “Contains FCC ID: TX2RTL8188CUB8”.

Manual Information To the End User
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.
Industry Canada Statement
This device complies with RSS-210 of the Industry Canada Rules. Operation is subject to the following two
conditions:

1) this device may not cause interference and

2) this device must accept any interference, including interference that may cause undesired operation of
the device

This device has been designed to operate with an antenna having a maximum gain of 3.9 dBi.
Antenna having a higher gain is strictly prohibited per regulations of Industry Canada. The required
antenna
impedance is 50 ohms.

To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that
the EIRP is not more than required for successful communication.

IMPORTANT NOTE:
IC Radiation Exposure Statement:
This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator & your
body.

Slim Module Combo Card User Manual

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4.5.2 Industry Canada Statement

This device complies with RSS-210 of the Industry Canada Rules. Operation is subject to the
following two conditions:

1) this device may not cause interference and

2) this device must accept any interference, including interference that may cause undesired operation of
the device

This device has been designed to operate with an antenna having a maximum gain of 3.9dBi.

Antenna having a higher gain is strictly prohibited per regulations of Industry Canada. The required
antenna impedance is 50 ohms.

To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that
the EIRP is not more than required for successful communication.

IMPORTANT NOTE:

IC Radiation Exposure Statement:

This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator & your
body.

This device is intended only for OEM integrators
under the following conditions:

The transmitter module may not be co-located with any other transmitter or antenna.
As long as conduction above is met, further transmitter test will not be required. However, the OEM

integrator is still responsible for testing their end-product for any additional compliance requirements
required with this module installed (for example, digital device emissions, PC peripheral requirements,
etc.). The antenna must be installed such that 20 cm is maintained between the antenna and users.

IMPORTANT NOTE: In the event that these conditions can not be met (for example certain laptop
configurations or co-location with another transmitter), then the IC authorization is no longer considered
valid and the IC ID can not be used on the final product. In these circumstances, the OEM integrator will be
responsible for re-evaluating the end product (including the transmitter) and obtaining a separate IC
authorization.

End Product Labeling

The final end product must be labeled in a visible area with the following: “Contains IC :
6317A-RTL8188CUB8”.

Manual Information That Must be Included

The OEM integrator has to be aware not to provide information to the end user regarding how to install or
remove.

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RTL8188CUB8

This RF module in the user’s manual of the end product which integrates this module.
The user’s manual for OEM Integrators must include the following information in a prominent location

“IMPORTANT NOTE: To comply with FCC RF exposure compliance requirements. The antenna must not
be co-located or operating in conjunction with any other antenna or transmitter”.

Slim Module Combo Card User Manual

4.5.3 NCC 警語

經型式認證合格之低功率射頻電機，非經許可，公司、商號或使用者均不得擅自變更頻率、加大功
率或變更原設計之特性及功能。

低功率射頻電機之使用不得影響飛航安全及干擾合法通信；經發現有干擾現象時，應立即停用，並
改善至無干擾時方得繼續使用。前項合法通信，指依電信法規定作業之無線電通信。低功率射頻電
機須忍受合法通信或工業、科學及醫療用電波輻射性電機設備之干擾。

本模組於取得認證後將依規定於模組本體標示審合格籤，並要求平台上標示「本產品內含射頻模
組：ID編號」

Realtek Semiconductor Corp.
Headquarters

No. 2, Innovation Road II, Hsinchu Science Park,
Hsinchu, 300, Taiwan, R.O.C.
Tel: [phone] Fax: [phone]
www.realtek.com.tw

11 Rev.1.0