datasheet.pdf

Jak podłączyć kartę wifi RTL8188EUS do arduino

Siema mam pytanie czy da się podłączyć to małe cudo do arduino interesuje mnie komunikacja: kartę podłączam do arduino a z komputera wysyłam informacje do arduino. http://obrazki.elektroda.pl/7155252900_1416507098_thumb.jpg http://obrazki.elektroda.pl/4958120100_1416507099_thumb.jpg


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RTL8188EUS

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SINGLE-CHIP IEEE 802.11b/g/n 1T1R WLAN
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(CONFIDENTIAL: Development Partners Only)

Rev. 0.2
27 Mar. 2012
Track ID:

Realtek Semiconductor Corp.

No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
Tel.: +886-3-578-0211. Fax: +886-3-577-6047
www.realtek.com

RTL8188EUS
Datasheet
COPYRIGHT
(C)2011 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.

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DISCLAIMER

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Realtek provides this document "as is", without warranty of any kind. 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.

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TRADEMARKS

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

USING THIS DOCUMENT

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

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REVISION HISTORY

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Revision
0.2

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Release Date
2012/3/27

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Summary
Preliminary release

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Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

ii

Track ID: JATR-2265-11 Rev. 0.5

RTL8188EUS
Datasheet

Table of Contents

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1.  GENERAL DESCRIPTION ...............................................................................................................................................1 
2.  FEATURES ..........................................................................................................................................................................3 

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3.  APPLICATION DIAGRAM ...............................................................................................................................................5 
3.1. 
3.2. 
3.3. 

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SINGLE-BAND 11N (1X1) SOLUTION WITH SINGLE ANTENNA .........................................................................................5 
SINGLE-BAND 11N (1X1) SOLUTION WITH DUAL ANTENNA DIVERSITY .........................................................................6 
SINGLE-BAND 11N (1X1) SOLUTION WITH DUAL ANTENNA............................................................................................6 

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4.  PIN ASSIGNMENTS...........................................................................................................................................................7 
4.1. 

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PACKAGE IDENTIFICATION ..............................................................................................................................................7 

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5.  PIN DESCRIPTIONS ..........................................................................................................................................................7 

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5.1. 
5.2. 
5.3. 
5.4. 
5.5. 

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USB BUS TRANSCEIVER INTERFACE ...............................................................................................................................8 
POWER PINS ....................................................................................................................................................................8 
RF INTERFACE ................................................................................................................................................................8 
LED INTERFACE..............................................................................................................................................................9 
CLOCK AND OTHER PINS ...............................................................................................................................................10 

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6.  ELECTRICAL AND THERMAL CHARACTERISTICS.............................................................................................11 

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6.1.  TEMPERATURE LIMIT RATINGS .....................................................................................................................................11 
6.2.  DC CHARACTERISTICS ..................................................................................................................................................11 
6.2.1.  Power Supply Characteristics .............................................................................................................................11 
6.2.2.  Digital IO Pin DC Characteristics.......................................................................................................................11 

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7.  INTERFACE TIMING SPECIFICATION .....................................................................................................................13 
7.1. 

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USB BUS DURING POWER ON SEQUENCE .....................................................................................................................13 

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8.  MECHANICAL DIMENSIONS .......................................................................................................................................14 

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8.1. 

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MECHANICAL DIMENSIONS NOTES ...............................................................................................................................14 

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9.  ORDERING INFORMATION .........................................................................................................................................15 

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Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

iii

Track ID: JATR-2265-11 Rev. 0.5

RTL8188EUS
Datasheet

List of Tables
TABLE 1. USB BUS TRANSCEIVER INTERFACE...............................................................................................................................8 
TABLE 2. POWER PINS ...................................................................................................................................................................8 
TABLE 3. RF INTERFACE ...............................................................................................................................................................8 
TABLE 4. LED INTERFACE.............................................................................................................................................................9 
TABLE 5. CLOCK AND OTHER PINS ..............................................................................................................................................10 
TABLE 6.  TEMPERATURE LIMIT RATINGS .................................................................................................................................11 
TABLE 7.  DC CHARACTERISTICS ..............................................................................................................................................11 
TABLE 8.  3.3V GPIO DC CHARACTERISTICS ...........................................................................................................................11 
TABLE 9.  2.8V GPIO DC CHARACTERISTICS ...........................................................................................................................11 
TABLE 10. 
1.8V GPIO DC CHARACTERISTICS .......................................................................................................................12 
TABLE 11. 
THE TYPICAL TIMING RANGE .................................................................................................................................13 
TABLE 12. 
ORDERING INFORMATION ......................................................................................................................................15 

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FIGURE 1. SINGLE-BAND 11N (1X1) SOLUTION ...............................................................................................................................5 
FIGURE 2. SINGLE-BAND 11N (1X1) DUAL ANTENNA DIVERSITY SOLUTION ....................................................................................6 
FIGURE 3. SINGLE-BAND 11N (1X1) DUAL ANTENNA SOLUTION .....................................................................................................6 
FIGURE 4. PIN ASSIGNMENTS ..........................................................................................................................................................7 
FIGURE 5. RTL8188EUS USB BUS POWER ON SEQUENCE ..........................................................................................................13 

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Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

iv

Track ID: JATR-2265-11 Rev. 0.5

RTL8188EUS
Datasheet

1.

General Description

The Realtek RTL8188EUS is a highly integrated single-chip 802.11n Wireless LAN (WLAN) network
USB interface (USB 1.0/1.1/2.0 compliant) controller. It combines a WLAN MAC, a 1T1R capable WLAN
baseband, and WLAN RF in a single chip. The RTL8188EUS provides a complete solution for a high
throughput performance integrated wireless LAN device.

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The RTL8188EUS WLAN baseband implements Orthogonal Frequency Division Multiplexing (OFDM)
with 1 transmit and 1 receive path and is compatible with the IEEE 802.11n specification. Features include
one spatial stream transmission, short guard interval (GI) of 400ns, spatial spreading, and transmission over
20MHz and 40MHz bandwidth.

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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.

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The RTL8188EUS WLAN Controller 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.

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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.

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The RTL8188EUS WLAN Controller supports fast receiver Automatic Gain Control (AGC) with
synchronous and asynchronous control loops among antennas, antenna diversity functions, and adaptive
transmit power control function to obtain the better performance in the analog portions of the transceiver.

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The RTL8188EUS WLAN 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
Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

1

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet
with BA and A-MSDU, protocol efficiency is significantly improved. Power saving mechanisms such as
Legacy Power Save, and U-APSD, reduce the power wasted during idle time, and compensates for the extra
power required to transmit OFDM. The RTL8188EUS provides simple legacy and 20MHz/40MHz
co-existence mechanisms to ensure backward and network compatibility.

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Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

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Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

2. Features
General

Power saving mechanism

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46-pin QFN

Channel management and co-existence

CMOS MAC, Baseband PHY, and RF in a
single chip for IEEE 802.11b/g/n
compatible WLAN

Transmit Opportunity (TXOP) Short
Inter-Frame Space (SIFS) bursting for
higher multimedia bandwidth

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Complete 802.11n solution for 2.4GHz
band
72.2Mbps receive PHY rate and 72.2Mbps
transmit PHY rate using 20MHz bandwidth

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WLAN MAC Features

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PHY-level spoofing to enhance legacy
compatibility
Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

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Selectable receiver FIR filters

Frame aggregation for increased MAC
efficiency (A-MSDU, A-MPDU)

Low latency immediate High-Throughput
Block Acknowledgement (HT-BA)

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Hardware antenna diversity in per packet
base

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802.11i (WPA, WPA2). Open, shared key,
and pair-wise key authentication services

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Maximum data rate 54Mbps in 802.11g and
150Mbps in 802.11n

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IEEE 802.11e QoS Enhancement (WMM)

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OFDM with BPSK, QPSK, 16QAM, and
64QAM modulation.
Convolutional Coding Rate: 1/2, 2/3, 3/4,
and 5/6

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IEEE 802.11b/g/n compatible WLAN

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DSSS with DBPSK and DQPSK, CCK
modulation with long and short preamble

Complies with USB 1.0/1.1/2.0 for WLAN

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20MHz and 40MHz bandwidth
transmission
Short Guard Interval (400ns)

Backward compatible with 802.11b/g
devices while operating in 802.11n mode

Standards Supported

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One Transmit and one Receive path (1T1R)

Compatible with 802.11n specification

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IEEE 802.11n OFDM

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150Mbps receive PHY rate and 150Mbps
transmit PHY rate using 40MHz bandwidth

Interface

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WLAN PHY Features

Programmable scaling in transmitter and
receiver to trade quantization noise against
increased probability of clipping
Fast receiver Automatic Gain Control
(AGC)
On-chip ADC and DAC

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet
Peripheral Interfaces
General Purpose Input/Output (8 pins)

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Three configurable LED pins

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Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

4

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

3.

Application Diagram

3.1. Single-Band 11n (1x1) Solution with Single Antenna

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Figure 1. Single-Band 11n (1x1) Solution

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Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

5

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

3.2. Single-Band 11n (1x1) Solution with Transmit & Receive
Diversity

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Figure 2. Single-Band 11n (1x1) Transmit & Receive Diversity solution

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3.3. Single-Band 11n (1x1) Solution with Transmit & Receive
Diversity

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Figure 3. Single-Band 11n (1x1) Transmit & Receive Diversity sSolution
Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

6

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

GPIO[4]

GPIO[7]

GPIO[5]/LED2

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33

GPIO[0]/WLAN_ACT
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VD33D

LX_SPS

GND

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NC

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NC

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Figure 4. Pin Assignments

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Pin Descriptions I
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VD12D

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ANT_SEL_2

15
ANT_SEL_N/LED1

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VD12A

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GPIO[8]/CK_OUT

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VD33A

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GPIO[2]/BT_STATE

SPS/LD0_SEL/GPIO[1]

GPIO[3]/BT_PRI
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VD33D

VD33D
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NC

VD12D

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44

43

TRSWN
45

46

ANT_SEL_P/LED0

Pin Assignments

TRSWP

4.

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'Green' package is indicated by a 'G' in the location marked 'T' in Figure 4.

The following signal type codes are used in the tables:
I: Input

Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

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T/S: Tri-State bi-directional input/output pin

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O: Output

S/T/S: Sustained Tri-State
Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet
O/D: Open Drain

P: Power pin

5.1. USB Bus Transceiver Interface
Symbol
HSDM/HSDP

Type
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5.2. Power Pins
Symbol
LX_SPS
VD33A
VD33D
VD12A
VD12D
GND

Type
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Table 1. USB bus Transceiver Interface
Pin No
Description
27/26
USB Receive Differential Pair

Pin No
22
4,9,12,
23,28,40,41
7,8,13,25
17,42
21,47

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Table 2. Power Pins
Description
Switching Regulator Output
VDD 3.3V for Analog
VDD 3.3V for Digital
Analog 1.2V Regulator Output
Digital 1.2V Regulator Output
Ground

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5.3. RF Interface
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Symbol
TRSWN

Type
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Pin No
45

PAPE
TRSWP
TXPA_OP
TXPA_ON
RX_IP
RX_IN
ANT_SEL_P

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44

ANT_SEL_N

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ANT_SEL_2

O

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Table 3. RF Interface
Description
Transmit/Receive
Shared with LED2, can be selected by control register
2.4GHz Transmit Power Amplifier Power Enable 0
Transmit/Receive
RF TX Negative Signal
RF TX Positive Signal
RF RX Positive Signal
RF RX Negative Signal
Antenna Control Positive Signal
Shared with LED0, can be selected by control register
Antenna Control Negative Signal
Shared with LED1, can be selected by control register
Antenna Control Extend Signal

Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

8

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

5.4. LED Interface
Symbol
LED0

Type
O

LED1

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33

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LED2

Table 4. LED Interface
Description
LED Pins (Active Low)
Shared with ANT_SEL_P, can be selected by control register
LED Pins (Active Low)
Shared with ANT_SEL_N, can be selected by control register
LED Pins (Active Low)
Shared with GPIO5, can be selected by control register

Pin No
44

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Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

9

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

5.5. Clock and Other Pins
Symbol
XI
XO
PDn
REXT
USB_XTAL_SEL

GPIO0/WLAN_ACT

GPIO1/ (SPS/LDO_SEL
mode)

GPIO2/BT_STATE

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GPIO3/BT_PRI

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GPIO4
GPIO5/LED2

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GPIO7
GPIO8/CK_OUT
NC

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Table 5. Clock and Other Pins
Type Pin No Description
I
11
25/40MHz OSC Input
Input of 25/40MHz Crystal clock reference
O
10
Output of 25/40MHz Crystal Clock Reference
I
32
This Pin can Externally Shutdown RTL8188CE without Extra Power Switch
O
24
Band gap. It needs to link 24k resister pull down.
I
30
Trap Function: Decide to use the 25/40Mhz crystal by this pin power on
latch low or high.
USB_XTAL_SEL = 1, XTAL frequency is 40MHz
USB_XTAL_SEL = 0, XTAL frequency is 25MHz
IO
36
General Purpose Input/Output Pin or Bluetooth Coexistence WLAN_ACT
Pin
The WLAN_ACT signal indicates when WLAN is either transmitting or
receiving in the 2.4GHz ISM band.
IO
39
Trap Function: Decide to use the SWR or LDO for 3.3V - & gt; 1.2V by this pin
power on latch low or high.
LDO_SPS_SEL = 0, use SWR
LDO_SPS_SEL = 1, use LDO
General Purpose Input/Output Pin or Bluetooth Coexistence WLAN_RX
Pin.
IO
37
General Purpose Input/Output Pin or Bluetooth Coexistence BT_STAT Pin
The BTSTAT signal indicates when normal Bluetooth packets are being
transmitted or received.
IO
38
General Purpose Input/Output Pin or Bluetooth Coexistence BT_PRI Pin
The BTPRI signal indicates when a high priority Bluetooth packet is being
transmitted or received.
IO
35
General Purpose Input/Output Pin
IO
33
General Purpose Input/Output Pin
Shared with LED2, can be selected by control register
IO
34
This pin can also support WLAN Radio off function with host interface
remaining connected.
IO
14
General Purpose Input/Output Pin
Buffered 25/40M clock outputs for other peripheral IC
NA 18,19,20 No connect. Let it open.
,29,31,
43

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0
-

2
1

0
2
Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

10

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

6. Electrical and Thermal Characteristics
6.1. Temperature Limit Ratings
Table 6.

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Parameter
Storage Temperature
Ambient Operating Temperature
Junction Temperature

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Symbol
VD33A, VD33D
VD12A, VD12D
VD15A, VD15D
IDD33

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6.2.2.

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Symbol
VIH
VIL
VOH
VOL

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Table 8.

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Parameter
Input high voltage
Input low voltage
Output high voltage
Output low voltage

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R

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o
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Parameter
Input high voltage
Input low voltage
Output high voltage
Output low voltage

R

Maximum
3.6
1.32
1.575
600

W
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0
-

Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

2
1

0
2
11

Maximum
3.1
0.8
3.1
0.28

4
3

:
1

1
:

5
1

Maximum
3.6
0.9
3.3
0.33

6
1

5

2.8V GPIO DC Characteristics
Minimum
Normal
1.8
2.8
-0
2.5
-0
--

Units
V
V
V
mA

N
E

H
S

R
E

N
E

H
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3.3V GPIO DC Characteristics
Minimum
Normal
2.0
3.3
-0
2.97
-0
--

C
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Table 9.

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DC Characteristics
Minimum
Typical
3.0
3.3
1.10
1.2
1.425
1.5
-

Digital IO Pin DC Characteristics

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Symbol
VIH
VIL
VOH
VOL

Parameter
3.3V I/O Supply Voltage
1.2V Core Supply Voltage
1.5V Supply Voltage
3.3V Rating Current

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Power Supply Characteristics
Table 7.

Units
°C
°C
°C

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6.2. DC Characteristics
6.2.1.

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Temperature Limit Ratings
Minimum
Maximum
-55
+125
0
70
0
125

Units
V
V
V
V

Units
V
V
V
V

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet
Table 10. 1.8V GPIO DC Characteristics
Parameter
Minimum
Normal
Input high voltage
1.7
1.8
Input low voltage
-0
Output high voltage
1.62
-Output low voltage
0
--

Symbol
VIH
VIL
VOH
VOL

Maximum
2.0
0.8
1.8
0.18

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Units
V
V
V
V

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:
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1
:

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0
-

2
1

0
2
Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

12

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

7. Interface Timing Specification
7.1.

USB Bus during Power On Sequence

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3 .3V
Ton TP OR

Tattach

Tk-state

D+
D-

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SE0 Reset
POR

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Figure 5. RTL8188EUS USB Bus Power On Sequence
Ton: The main power ramp up duration
Tpor: The power on reset releases and power management unit executes power on tasks
Tattach: USB attach state
Tk-state: the duration from resister attached to USB host starting card detection procedure

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Card Detection

N
E

H
Z

The power on flow description:
After main 3.3V ramp up, the internal power on reset is released by power ready detection circuit and the power management
unit will be enabled. The power management unit enables the internal regulator and clock circuits.
The power management unit also enables the USB circuits.
USB analog circuits attach resisters to indicate the insertion of the USB device
Table 11.

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The typical timing range
Unit
ms
Ton
ms
Tpor
ms
Tattach
ms
Tk-state

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Min
--2
50

N
E

Typical
1.5
2
7
250

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R

H
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Max
5
10
15
--

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3

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1
:

5
1

5

0
-

2
1

0
2
Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

13

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

8.

Mechanical Dimensions

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E

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N
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4
3

:
t
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8.1. Mechanical Dimensions Notes
1
k
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S
1
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5
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6
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5
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0
T
R
2
1
0
2
Symbol

Min
0.75
0.00
0.55

Dimension in mm
Nom
0.85
0.035
0.65
0.20 REF
0.20
6.50BSC
5.1
4.5BSC
2.5
0.40BSC
0.40

Max
1.00
0.05
0.80

A
A1
A2
A3
b
0.15
0.25
D
D2
4.85
5.35
E
E2
2.25
2.75
e
L
0.30
0.50
Notes:
1. CONTROLLING DIMENSION:MILLIMETER(mm).
2. REFERENCE DOCUMENTL:JEDEC MO-220.

Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

14

Min
0.030
0.000
0.022

0.006

0.191

0.088

0.012

Dimension in inch
Nom
0.034
0.001
0.026
0.008 REF
0.008
0.256BSC
0.201
0.177BSC
0.098
0.016BSC
0.016

Max
0.039
0.002
0.032

0.010

0.211

0.108

0.020

Track ID: JATR-2265-11 Rev. 0.1

RTL8188EUS
Datasheet

9.

Ordering Information
Table 12. Ordering Information

Part Number
Package
RTL8188EUS-CG
QFN-46, 'Green' Package
Note: See page 7 for package identification.

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Status
Engineering Samples

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0
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2
1

Realtek Semiconductor Corp.
Headquarters
No. 2, Innovation Road II, Hsinchu Science Park,
Hsinchu 300, Taiwan, R.O.C.
Tel: 886-3-5780211 Fax: 886-3-5776047
www.realtek.com

0
2

Single-Chip IEEE 802.11b/g/n 1T1R WLAN Controller
with USB Interface

15

Track ID: JATR-2265-11 Rev. 0.1


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