Transcript
Neo_WL680 Hardware User Guide V1.1
Let's enjoy the wireless life
Neo_WL680 Hardware User Guide
V1.1
Copyright Copyright © 2008 Neoway Technology All rights reserved.
is a trade mark of Shenzhen Neoway Technology Co., Ltd.
Notice This document is intended for the customer engineers. This document is subject to change without any notice. No responsibility is assumed by Neoway Technology for the use of this document.
Neoway Technology always provides the best supports. For pricing, ordering information and delivery please contact:
[email protected] For any technical support requests please contact:
[email protected] For further information please visit: http://www.neoway.com.cn
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Contents 1.
Introduction............................................................... 5
2.
Simplified Block Diagram ................................................... 5
3.
Key Features .............................................................. 5
4.
Product Specifications ................................................... 7
5.
4.1
Dimension & Package........................................................................................................... 7
4.2
Pin Description...................................................................................................................... 7
Application Interface ....................................................... 9 5.1
6.
Power Supply Requirements ................................................................................................. 9 5.1.1
Power Supply Basic Design Rules ............................................................................ 9
5.1.2
ON/OFF Procedure .................................................................................................. 9
5.1.3
Turning on the module ......................................................................................... 10
5.1.4
Turning off the module ......................................................................................... 10
5.2
RESET ................................................................................................................................ 11
5.3
VMC ................................................................................................................................... 11
5.4
UART .................................................................................................................................. 12 5.4.1
Basic Descriptions of UART.................................................................................... 12
5.4.2
Level Translators for UART .................................................................................... 12
5.5
Audio Interface ................................................................................................................... 14
5.6
Antenna Interface ................................................................................................................ 16
RF index & Current consume ............................................... 17 6.1
Receiver specification ......................................................................................................... 17
6.2
Transmitter specification..................................................................................................... 18
6.3
Current consumption .......................................................................................................... 19
7.
PCB Footprint ............................................................ 20
8.
Reliable index & Test standard .............................................. 20
9.
8.1
Temperature index & Test standard .................................................................................... 20
8.2
EMC index & Test standard ................................................................................................. 21
Package ................................................................. 21
10. Terms and Abbreviations ................................................... 22
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Neo_WL680 Hardware User Guide
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Revision History Version
Remarks
Date Issue
V1.0
Initial Version
2013-9
V1.1
Change temperature line
2013-10
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1. Introduction This document describes the hardware features of WL680, and guides for the relevant application design. With the ultra-compact design, WL680 is intended to be used in a wide range of applications, including industrial and consumer devices. WL680 is a WIFI module with IEEE802.11b/g/n protocol supporting, and internal integrating TCP/IP protocol.
2. Simplified Block Diagram
I2C I2C UART
PA
SAW
MCU
RF SECTION
FILTER
Control
ADC PWM AUDIO
eHPI
MCU
MAC
BT
LAYER Figure 1, WL680 Block Diagram
3. Key Features Table1, WL680 Key Features
Feature Frequency range RX sensitivity
TX power
Description 2.412~2.484 GHz 802.11b: -86 .5dBm @ 11Mbps （typical） 802.11g: -73dBm @ 54Mbps（typical） 802.11n: -69dBm @ 65Mbps（typical） 802.11b: +17.5dBm（typical） 802.11g: +15dBm（typical） 802.11n: +13dBm （typical）
Data rate
802.11b: 1,2,5.5,11Mbps
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802.11g:6,9,12,18,24,36,48,54Mbps 802.11n: 6.5 , 13 , 19.5 , 26 , 39 , 52 , 58.5 , 65Mbps WLAN standard
IEEE802.11b/g /n
Modulation mode
DSSS,OFDM,DBPSK,DQPSK,CCK,QAM16/64
Work mode Net type
STA /AP 方式 Infra/Adhoc/WIFI Direct(WFA P-2-P standard)
Security regime
WFA,WPA/WPA2,WPS2.0
Encryption type
WEP64/WEP128/TKIP/CCMP(AES)
Parameter configuration type Network protocol Communication interface UART interface rate AT Open resource
UART/WEB server TCP/IP, UDP,FTP,DNS,HTTP,SMTP UART 1200~921600bps Neoway AT commands UART、I 2C、ADC、PWM、GPIO、MIC、EAR 、SPEAKER
Operating temperature
-40℃～+85℃
Storage temperature
-40℃～+85℃
Operating voltage
3.5V～4.2V（recommend 3.9V ）
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4. Product Specifications 4.1 Dimension & Package Feature
WL680
Size
15mm*18mm*2.1mm (L*W*H)
Height
2g
Package
71 Pin
LGA
Figure 2, WL680 View
4.2 Pin Description Table2, WL680 pin definition
Pin
Name
I/O
Function
1
ON/OFF
DI
Control to turn ON/OFF the module
2
SPKP
AO
Speaker output positive
3
SPKN
AO
Speaker output negative
4
MICP0
AI
MIC0 audio difference input positive
5
MICN0
AI
MIC0 audio difference input negative
6
EAR-L
AO
Earpiece audio output left
7
EAR-R
AO
Earpiece audio output right
8~28
Reserved
29
GND
P
30
BT_ANT
I/O
31
GND
P
Note Active low 0.9W@8Ω, use command to active
Peak voltage≤200mV 16Ω/32Ω earpiece drive output
Reserved GND Bluetooth RF input/output, connect 50Ω antenna
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AT
GND Page 7 of 22
Neo_WL680 Hardware User Guide 32~35
Reserved
V1.1 Reserved
36
VMC
P
2.8V output
37
URXD
DI
UART data receive
38
DO
UART data send
39~40
UTXD Reserved
41
VRTC
P
RTC source
42
DTR
DI
Put the module into sleep mode
43
Reserved
44
LIGHT
DO
Indicate module work status, can output2.8V/4mA
45
Reset
DI
Reset input
46
GND
P
47
WIFI_ANT
I/O
GND WIFI RF input/output, connect 50Ω antenna
48
P
49~55
GND Reserved
GND Reserved
56
ADC
AI
ADC input
VBAT
P
Main power input
60
GND
P
GND
61
USB_DM
I/O
USB data+
62
USB_DP
I/O
USB data-
GND
P
GND
VBAT
P
Main power input
GND
P
GND
URXD internal pull up by 47K resistor
Reserved 2.8V, max charge current is 2mA
Reserved
57 58
Used for level transform circuit,load capacity<50mA
59
High level can light LED directly Active low
10-bit A/D converter 3.5V~4.2V, recommend3.9V
Procedure interface
download
63 64 65 66 67 68
3.5V~4.2V, recommend3.9V
69 70 71
Note: P means power pin, DI means digital signal input, DO means digital signal output, AI means analog signal input, AO means analog output, Reserved means reserve pin, I/PU means input pull up, I/PD means input pull down. Copyright Neoway Technology Co., Ltd.
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5. Application Interface 5.1 Power Supply Requirements Table3, Power Supply and ON/OFF Control
Name VMC
I/O P
Function 2.8V voltage output
VRTC
Load capacity<50mA
P
RTC voltage input
2.8V
Reset
DI
Reset input
Active low
ON/OFF VBAT
DI
Switch the module on/off Module main power input
Active low
P
Note
3.5V~4.2V, recommend 3.9V
5.1.1 Power Supply Basic Design Rules VBAT is the main power supply for internal base band and radio PA of the module, in a range of 3.5V-4.2V. A 3.9V voltage is preferable.
figure5-1-1, Power reference design
5.1.2
ON/OFF Procedure
ON/OFF is a low level pulse active input, used to turn on or off the module.
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Figure 9, Turning on /off the module using ON/OFF
5.1.3 Turning on the module While the module is off, drive the ON/OFF pin to ground for at least 800mS (1S is recommended) and then release, the module will start. An unsolicited message will be sent to host through AT port (“+EIND: 1"), indicating the powering up of the module and the AT commands can respond. It’s recommended to drive the ON/OFF to low before applying the VBAT to module. 400mS (500mS is recommended) later from the VBAT applied, release the ON/OFF. Therefore the module starts up. The simplest way to power on the module, is to directly tie the ON/OFF to ground, issuing to an auto-power-on feature. After the module is operating, keep ON/OFF being high level.
5.1.4 Turning off the module While the module is on, drive the ON/OFF pin to ground for at least 500mS and then release, the module will try to detach to network and normally 1 second later it will shut down. Another approach to turn off the module is with AT command. Figure 10 shows a reference circuits for ON/OFF control with inverted control logic.
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Figure 10, Reference circuit for ON/OFF control
Reference Components: Q1: MMBT3904, or to use digital transistor with bias resistors built in, like DTC123/114 The combination of R3 and R4, should limit the high voltage of ON/OFF less than 3.0V.
Note:
If the host itself is not initialized before turning on the module, some abnormal conditions on IO or UART may affect the power on procedure.
The better way to rescue the module from abnormal condition, is to apply a power OFF-ON procedure, rather than using the ON/OFF control signal. In fact ON/OFF signal is software-dependent.
5.2 RESET Pull the RESET signal to low level for at least 60mS to reset the module. A pull-up resistor is internally included. Reset pin can be left open if not used.
5.3 VMC VMC is provided to power the level translators, with a 2.8V / 50mA output. VMC can also be used to monitor the on/off state of module. It outputs 2.8V high level while the module is on, and low level while the module is off.
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5.4 UART 5.4.1 Basic Descriptions of UART Table4, UART
Signal
I/O
Function
URXD1
DI DO
Serial input of module Serial output of module
UTXD1
Note
UART1 is for AT commands, data sending/receiving, firmware updating, etc. As a DCE device, the module is connected to DTE as shown in Figure 11. Supported baud rates are 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400bps, and the default is 115200.
Figure 11, Connection between DCE (module) and DTE
The UART of WL680 works at 2.8V CMOS logic level. The voltages for input high level should not exceed 3.0V.
5.4.2 Level Translators for UART If the UART is interfacing with a MCU that has 3.3V logic levels, resistors should be connected in series with the signals.
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Figure 12, Interfacing with 3.3V logic levels of MCU
If the UART is interfacing with a MCU that has 5V logic levels, general level translators are required, for both inputs and outputs. As shown in Figure 13.
Figure 13, Interfacing with 5V logic levels of MCU
Reference components: R2: 2K-10K. The higher rate the UART works at, the smaller value used R3: 4.7K-10K. The higher rate the UART works at, the smaller value used Q1: MMBT3904 or MMBT2222. High-speed transistors preferred. Used for 5V logic -> 2.8V logic: While this circuit used between MCU TXD and module URXD1, the INPUT signal is connected to MCU TXD, and OUTPUT connected to module URXD1. VCC_IN powered from 5V and VCC_OUT powered from 2.8V (module’s VMC can be used). This applies to DTR control as well. Used for 2.8V logic -> 5V logic: It can be used between module UTXD1 and MCU RXD as well, with INPUT connected to module UTXD1, and OUTPUT connected to MCU RXD. VCC_IN powered from 2.8V (module’s VMC) and VCC_OUT powered from 5V. This applies to RING signal as well.
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Note: Avoid sparks and glitches on UART signals while the module is in a turning on procedure. Avoid sending any data to UART during the beginning of 2 seconds after the module being turned on.
5.5 Audio Interface Table7, Audio Interface
Name SPKP
I/O AO
Function Speaker output positive
Note
SPKN
AO
Speaker output negative
MICP0
AI
MIC0 audio difference input positive
Peak voltage≤200mV
MICN0
AI
MIC0 audio difference input negative
Peak voltage≤200mV
EAR-L
AO
Earpiece audio output left
EAR-R
AO
Earpiece audio output right
0.9W@8Ω, use AT command to active
16Ω/32Ω earpiece drive output
For reference audio interface see Figure 18. The peak-peak voltage routed to MIC+/MIC- should not exceed 200mV.
AGC circuit is integrated inside the module. Electret microphone is suited.
Figure 18, Reference design of microphone interface
A bias voltage for microphone is provided through MICP and MICN, as shown in Figure 19. But if an amplifier is used between the microphone and module, capacitors like C1 and C2, should be Copyright Neoway Technology Co., Ltd.
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placed between the outputs of amplifier and module, to block the bias voltage. For a peak-peak voltage greater than 200mV, an attenuation circuit comprised of R1-R4 should be used.
Figure 19, Reference design for MIC interface
Figure 20, Reference design for Ear interface
Figure 20 shows a reference design for earpiece interface. A 16Ω/32Ω earpiece can be directly driven by the module. To pass the low frequency audio, use large capacitors for C1 and C2. If an external amplifier is used for driving the speakers, 1uF~4.7uF coupling capacitors should be used to block the DC voltage, as shown in Figure 21.
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Figure 21, Using capacitors to couple audio outputs
As the description of TDD noise before, the GSM radio frequency is modulated at 217Hz. The 217Hz and its derivative frequency is well within audio band, therefore a TDD noise often affect the audio performance through power and air. Some small capacitors between 27pF-100pF and ferrite beads, placed on the audio path can attenuate TDD noise. For Suppressing the TDD noise, differential audio interface is preferable. The PCB trace of audio signal should be routed as differential line. In particular, the microphone interface is a pair of small signal, peak-peak voltage <200mV, must comply the rule of differential line. The microphone interface should be routed as short as possible.
5.6 Antenna Interface A 50Ω antenna is required. VSWR < 1.5. The antenna should be well matched to achieve best performance. It should be installed far away from high speed logic circuits, DC/DC power, or any other strong disturbing sources. ESD protection is built in module. For special ESD protection, a ESD diode can be placed close to the antenna. But ensure to use a low junction capacitance one. The junction capacitance should be less than 0.5pF, otherwise the RF signal will be attenuated. RCLAMP0521P from Semtech, or ESD5V3U1U from Infineon, can be used here. See Figure 22. The trace between the antenna pad of module and the antenna connector, should have a 50Ω characteristic impedance, and be as short as possible. The trace should be surrounded by ground copper. Place plenty of via holes to connect this ground copper to main ground plane, at the copper edge. If the trace between the module and connector has to be longer, or built-in antenna is used, a π-type
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matching circuit should be needed, as shown in Figure 22. The types and values of C1, L1, and L2 should be verified by testing using network analyzer instrument. If the characteristic impedance is well matched, and VSWR requirement is met, just use a 0Ω resistor for C1 and leave L1, L2 un-installed. Avoid any other traces crossing the antenna trace on neighboring layer.
Figure 22, Reference design for antenna interface
6. RF index & Current consume 6.1 Receiver specification Note: All specification is measured at the antenna port unless otherwise specified. Parameter
Description
Frequency Range RX Sensitivity
RX Sensitivity
RX Sensitivity BW=20MHz Green Field
Min.
Typ.
Max.
Unit
2412
-
2484
MHz
1Mbps DSSS
-95
dBm
2Mbps DSSS
-93
dBm
5.5Mbps DSSS
-90
dBm
11Mbps DSSS
-86.5
dBm
6Mbps OFDM
-91.5
dBm
9Mbps OFDM
-89.5
dBm
12Mbps OFDM
-88.5
dBm
18Mbps OFDM
-86
dBm
24Mbps OFDM
-83
dBm
36Mbps OFDM
-79
dBm
48Mbps OFDM
-76.5
dBm
54Mbps OFDM
-73
dBm
MCS 0
-91
dBm
MCS 1
-87.5
dBm
MCS 2
-85.5
dBm
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Neo_WL680 Hardware User Guide 800NsGuard Interval Non-STBC
RX Sensitivity BW=40MHz Green Field 800nSGuard Interval Non-STBC
Maximum Receive Level
V1.1
MCS 3
-82.5
dBm
MCS 4
-79.5
dBm
MCS 5
-75
dBm
MCS 6
-73.5
dBm
MCS 7
-72
dBm
MCS 0
-88
dBm
MCS 1
-84.5
dBm
MCS 2
-82.5
dBm
MCS 3
-79.5
dBm
MCS 4
-76.5
dBm
MCS 5
-73
dBm
MCS 6
-70.5
dBm
MCS 7
-68.5
dBm
11Mbps DSSS
-3
dBm
6Mbps OFDM
-3
dBm
54Mbps OFDM
-3
dBm
MCS0
-3
dBm
MCS7
-3
dBm
6.2 Transmitter specification Parameter
Description
Frequency Range
Min
Typ
Max
Unit
2412
-
2484
MHz
18.5
dBm
802.11b, 1~11Mbps DSSS
TX Accuracy
802.11g, 6 ~54Mbps OFDM
15
dBm
802.11n, MCS0~7
HT20
15
dBm
802.11n, MCS0~7
HT40
13
dBm
Power
Carrier Suppression Return Loss
Transmitted
±1.5
dB
30
dBc
8
dB
76~108 MHz
-143
dBm/Hz
776~794MHz
-143
dBm/Hz
869~960 MHz
-143
dBm/Hz
925~960 MHz
-143
dBm/Hz
1570~1580 MHz
-143
dBm/Hz
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Neo_WL680 Hardware User Guide Power
Harmonic Output Power
V1.1
1805~1880MHz
-143
dBm/Hz
1930~1990MHz
-143
dBm/Hz
2110~2170MHz
-143
dBm/Hz
Harmonic
-47
dBm/MHz
3 Harmonic
-76
dBm/MHz
nd
2
rd
6.3 Current consumption Note: All result is measured at the antenna port and VBAT is 3.6V. Description
Performance TYP
UNITS
OFF
13.5
μA
RX Active, BW40, HT40 MCS7
53.8
mA
RX Active, BW20, All supported rates
48.9
mA
RX Listen
36.2
mA
RX Sleep
67
μA
RX Power saving, DTIM=1
0.54
mA
TX HT40, MCS7@11dBm
170
mA
TX HT20, MCS7@14dBm
180
mA
TX OFDM, 54M@16dBm
195
mA
TX CCK, 11M@19dBm
230
mA
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7. PCB Footprint
Figure7-1-1, PCBfootprint (bottom view)
8. Reliable index & Test standard 8.1 Temperature index & Test standard
Operating temperature:-40℃ ~ +85℃
Storage temperature:-40℃ ~ +85℃
Humidity:0% ~ 95%
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85℃/ OFF
85℃/ ON
25℃/ ON
25℃/ ON
25℃/ ON
-40℃/ ON
25℃/ ON
25℃/ ON
-40℃/ OFF
storage
operation Figure 8-1-1, temperature line
8.2 EMC index & Test standard 1) ESD anti-interference Contact discharge：teat voltage 4kV Air discharge：test voltage 8kV 2) Radio frequency electromagnetic field radiation immunity test Test field intensity 10V/M (frequency range 80MHz ～1000MHz) 3) Radio continuous disturb Test range：30MHz-1GHz（peak value & average value） 4) Radio stray disturb Test range：30MHz-6000MHz
9. Package WL680 modules are packaged in sealed bags on delivery to guarantee a long shelf life. Package the modules again in case of opening for any reasons. If exposed in air for more than 48 hours at conditions not worse than 30°C/60% RH, a baking procedure should be done before SMT. Or, if the indication card shows humidity greater than 20%, the baking procedure is also required. The baking should last for at least 24 hours at 90℃. Copyright Neoway Technology Co., Ltd.
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10.
V1.1
Terms and Abbreviations
ADC
Analog-Digital Converter
AGC
Automatic Gain Control
AMR
Acknowledged multirate (speech coder)
CSD
Circuit Switched Data
CPU
Central Processing Unit
DCE
Data Communication Equipment
DTE
Data Terminal Equipment
DTR
Data Terminal Ready
EFR
Enhanced Full Rate
EMC
Electromagnetic Compatibility
EMI
Electro Magnetic Interference
ESD
Electronic Static Discharge
FR
Full Rate
GPRS
General Packet Radio Service
GSM
Global Standard for Mobile Communications
HR
Half Rate
IC
Integrated Circuit
IMEI
International Mobile Equipment Identity
LED
Light Emitting Diode
PCB
Printed Circuit Board
RAM
Random Access Memory
RF
Radio Frequency
SIM
Subscriber Identification Module
SMS
Short Message Service
SMT
Surface Mounted Technology
SRAM
Static Random Access Memory
TDMA
Time Division Multiple Access
UART
Universal asynchronous receiver-transmitter
Varistor
Voltage Dependent Resistor
VSWR
Voltage Standing Wave Ratio
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