Transcript
Neo_M660A GPRS Module Hardware User Guide Version 1.3
Neo_M660A GPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd 2016. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Shenzhen Neoway Technology Co., Ltd.
is the trademark of Neoway Technology Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice This document is intended for system engineers (SEs), development engineers, and test engineers. The information in this document is subject to change without notice due to product version update or other reasons. Every effort has been made in preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.
Neoway provides customers complete technical support. If you have any question, please contact your account manager or email to the following email addresses:
[email protected] [email protected] Website: http://www.neoway.com
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Neo_M660A GPRS Module Hardware User Guide
Revision Record Issue
Changes
Date
V1.0
Initial draft
2014-06
V1.1
Modified the definition of pin 53
2014-06
V1.2
Modified the definition of pin 66
2015-07
V1.3
Modified CTS/RTS
2016-03
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Neo_M660A GPRS Module Hardware User Guide
Contents About This Document ......................................................................................................... 1 1 Introduction to M660A ..................................................................................................... 1 1.1 Overview ..................................................................................................................................... 1 1.2 Block Diagram ............................................................................................................................ 1 1.3 Specifications .............................................................................................................................. 2
2 Pin Description and PCB Foot Print .............................................................................. 4 2.1 Specifications and Encapsulation ................................................................................................ 4 2.2 Pin Definition .............................................................................................................................. 5 2.3 PCB Foot Print ............................................................................................................................ 8
3 Interface Design................................................................................................................. 9 3.1 Power Supply and Switch Interfaces ........................................................................................... 9 3.1.1 VBAT ................................................................................................................................. 9 3.1.2 VDD_EXT ....................................................................................................................... 12 3.1.3 VRTC ............................................................................................................................... 12 3.1.4 Power On/Off Procedure .................................................................................................. 13 3.1.5 RESET.............................................................................................................................. 15 3.2 UART ........................................................................................................................................ 16 3.3 USB Interfaces .......................................................................................................................... 18 3.4 DTR and RING ......................................................................................................................... 19 3.4.1 DTR Pin ........................................................................................................................... 19 3.4.2 RING Signal Indicator...................................................................................................... 19 3.5 SIM Card Interface .................................................................................................................... 20 3.6 Running LED Indicator ............................................................................................................. 21 3.7 Audio Interface .......................................................................................................................... 22 3.8 RF Interface ............................................................................................................................... 24 3.8.1 RF Design and PCB Layout ............................................................................................. 24 3.8.2 Recommended RF Connection ......................................................................................... 25
4 Electric Features and Reliability................................................................................... 27 4.1 Electric Feature ......................................................................................................................... 27 4.2 Temperature ............................................................................................................................... 27 4.3 Current....................................................................................................................................... 28 4.4 ESD Protection .......................................................................................................................... 28
5 RF Features ....................................................................................................................... 30 5.1 Work Band................................................................................................................................. 30 5.2 Transmitting Power ................................................................................................................... 30 5.3 Receiving Sensitivity................................................................................................................. 31
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Neo_M660A GPRS Module Hardware User Guide
6 Mounting the Module onto the Application Board.................................................. 32 7 Package .............................................................................................................................. 32 8 Abbreviations................................................................................................................... 33
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Neo_M660A GPRS Module Hardware User Guide
Table of Figures Figure 2-1 Top view of the M660A module ............................................................................................ 4 Figure 2-2 PCB foot print recommended for M660A (unit: mm) ........................................................... 8 Figure 3-1 Current peaks and voltage drops ............................................................................................ 9 Figure 3-2 Reference design d for the power supply ............................................................................. 10 Figure 3-3 Reference design of power supply control ........................................................................... 10 Figure 3-4 Reference design of power supply controlled by p-MOSFET ..............................................11 Figure 3-5 Reference designs of separated power supply ...................................................................... 12 Figure 3-6 VRTC reference design ........................................................................................................ 13 Figure 3-7 Turning on procedure ........................................................................................................... 13 Figure 3-8 Turning off procedure .......................................................................................................... 14 Figure 3-9 Reference circuit for ON/OFF controlled by low level ........................................................ 14 Figure 3-10 Reference circuit for power-on controlled by high level .................................................... 15 Figure 3-11 Reset circuit with triode separating .................................................................................... 15 Figure 3-12 Signal connection between DCE and DTE ........................................................................ 16 Figure 3-13 Recommended communication circuit between 3.3V MCU and UART ........................... 17 Figure 3-14 Recommended communication circuit between 5V MCU and UART .............................. 17 Figure 3-15 USB circuit ........................................................................................................................ 18 Figure 3-16 RING indicator for incoming call ...................................................................................... 20 Figure 3-17 RING indicator for SMS .................................................................................................... 20 Figure 3-18 Reference design of SIM card interface ............................................................................. 21 Figure 3-19 Reference of SIM card socket ............................................................................................ 21 Figure 3-20 LED indicator directly driven by high level ....................................................................... 22 Figure 3-21 LED indicator driven by transistor ..................................................................................... 22 Figure 3-22 Reference design of MIC differential connections ............................................................. 23 Figure 3-23 Reference design for common audio input ........................................................................ 23 Figure 3-24 Reference design for receiver output ................................................................................. 24 Figure 3-25 Coupling capacitor interfacing ........................................................................................... 24 Figure 3-26 Reference design for antenna interface .............................................................................. 25 Figure 3-27 RF layout reference ............................................................................................................ 25 Figure 3-28 Encapsulation specifications of Murata RF connector ....................................................... 26 Figure 3-29 RF connections................................................................................................................... 26
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Neo_M660A GPRS Module Hardware User Guide
Table of Tables Table 1-1 M660A specifications .............................................................................................................. 2 Table 2-1 M660A pin definition .............................................................................................................. 5 Table 3-1 Power supply and switch interface .......................................................................................... 9 Table 3-2 UART .................................................................................................................................... 16 Table 3-3 USB interface ........................................................................................................................ 18 Table 3-4 DTR and RING pins .............................................................................................................. 19 Table 3-5 SIM card interface ................................................................................................................. 20 Table 3-6 LED indicator ........................................................................................................................ 21 Table 3-7 Audio interface ...................................................................................................................... 22 Table 4-1 Electric feature of the module ............................................................................................... 27 Table 4-2 Temperature Feature .............................................................................................................. 27 Table 4-3 Current feature ....................................................................................................................... 28 Table 4-4 ESD feature of the module .................................................................................................... 29 Table 5-1 Work band ............................................................................................................................. 30 Table 5-2 Transmitting power (GSM850&EGSM900) ......................................................................... 30 Table 5-3 Transmitting power (DCS1800&PCS1900) .......................................................................... 30
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Neo_M660A GPRS Module Hardware User Guide
About This Document This document defines the features, indicators, and test standards of the M660A module and provides reference for the hardware design of each interface. With Neo_M660A GPRS Module AT Command Set, this user guide can help you complete wireless communication application easily.
1 Introduction to M660A M660A is a compact wireless GSM/GPRS module that supports downlink EDGE. It can provide functions of high-quality voice, SMS, and data services and is widely used in industrial and consumer fields.
1.1 Overview Neoway M660A module adopts 68-pin LCC encapsulation and its dimensions are 24 mm x 24 mm x 2.6 mm, which can meet most customers' requirements. It provides customers the following hardware resources and features:
UART interfaces, used for data communication, firmware updating and commissioning, and supporting hardware flow control
Audio interfaces, including one line of MIC input (differential) and one line of receiver output (differential)
10-bit ADC input, voltage ranging from 0 V to 2.8 V
One line of SIM card interface, compatible with 1.8 V and 3.0V SIM card
RING/LIGHT/DTR (sleep mode) functions
Time updating and timing power-on/off
Firmware updating via USB interface
1.2 Block Diagram The M660A module consists of baseband controller, Flash ROM, RF section, application interfaces, etc. All sections coordinate with each other to provide such communication functions as GPRS data and voice. The following figure shows the block diagram of M660A.
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Neo_M660A GPRS Module Hardware User Guide
RF Front-end-module
RF transceiver
Power Manager
ON/OFF
Analog Baseband
FLASH
Digital Baseband
Digital Interface SIM
ADC
REC
MIC
Audio Interface
SIM
USB
VRTC
26 MHz Crystal
UART
VBAT
PC
1.3 Specifications Table 1-1 M660A specifications Specifications
Description
Band
GSM850/EGSM900/DCS1800/PCS1900 MHz dual-band/quad-band Supporting band locking
Sensitivity
< -107 dBm
Max. transmit power
GSM850/EGSM900 Class4(2W)
DCS1800/PCS1900 Class1(1W)
Protocol
Supporting GSM/GPRS Phase 2/2+
AT
GSM07.07
Extended AT commands
Audio
Supporting the following audio coding:
HR
FR
EFR
AMR
Supporting echo suppression
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Neo_M660A GPRS Module Hardware User Guide Supporting recording and DTMF check function SMS
GPRS feature
Circuit Switch Data
Supplementary service
UART
RTC
TEXT/PDU
Supporting SMS message receiving and sending and ring for new SMS messages
Supporting SMS message management: reading/deleting/storage/list
GPRS CLASS 12
Max. theoretic uplink rate: 85.6 Kbit/s
Max. theoretic downlink rate: 85.6 Kbit/s
Built-in TCP/IP protocol, supporting multiple links
Supporting server and client modes
CSD
USSD
Call forwarding
Call waiting
Call holding and multi-way calling
Supporting hardware flow control, RTS and CTS controlled via AT commands
Supporting multiplexing
Supporting AT sending, data transmission, and software download
Supporting baudrate from 1200 bit/s to 115200 bit/s
Supporting real-time clock and time updating
Supporting timing power-on/off
CPU
ARM7-EJ@360MHz
Antenna feature
50 Ω impedance
Operating temperature
-40℃ to +85℃
Operating voltage
3.5 V to 4.3 V (3.9 V is recommended)
Peak current
Max 2.0 A
Idle current
18 mA
Current mode
in
sleep
< 2 mA (live network) < 1 mA (instrument, DRX=9)
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Neo_M660A GPRS Module Hardware User Guide
2 Pin Description and PCB Foot Print 2.1 Specifications and Encapsulation Specifications
M660A
Dimensions
24 mm x 24 mm x 2.6 mm (H x W x D)
Weight
2.6 g
Encapsulation
68-pin LGA Figure 2-1 Top view of the M660A module
NC
NC
STATUS
GND
GND
GND
GND
GND
GPRS_ANT
GND
GND
VBAT
VBAT
VBTA
GND
GND
LIGHT
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
ON/OFF
1
51
NC
GND
2
50
NC
DTR
3
49 NC
RING
4
48
NC
NC
5
47
NC
NC
6
46
GND
CTS
7
45
GND
RTS
8
44
NC
UTXD
9
43
NC
URXD
10
42
NC
NC
11
41
NC
NC
12
40
NC
NC
13
39
GND
M660A （TOP VIEW）
NC
14
38
NC
VDD_EXT
15
37
NC
RESET
16
36
NC
GND
17
35
NC
34
SIM_CLK
SIM_RST
NC
SIM_DATA
33
VSIM
32
31
GND
USB_DM
30
USB_DP
29
28
VRTC
ADC_IN
27
VBUS
26
25
NC
RECN
24
RECP
23
22
MICP
MICN
GND
21
19
20
18
POWER
GND
SIM
UART
USB
AUDIO
ADC
ANT
OTHERS
NC
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Neo_M660A GPRS Module Hardware User Guide
2.2 Pin Definition Table 2-1 M660A pin definition Pin
Name
I/O
Function
Reset Status
Level (V)
Feature
Remarks
Power Supply and Switch Interfaces 55, 56, 57
VBAT
P
Main power supply input
3.5 V to 4.3 V (3.9 V is recommended) Supply power for IO level shifting circuit. Load capability: less than 50 mA 2.8 V, maximum output charging current 2 mA
15
VDD_EXT
P
2.8 V power supply output
26
VRTC
P
RTC power supply
2, 17, 18, 29, 39, 45, 46, 53, 54, 58, 59, 61-65
GND
P
Ground
1
ON/OFF
DI
ON/OFF control input
16
RESET
DI
Reset input
AI
Positive electrode of differential MIC output
I/PU
0
