User Manuals: SIMCom SIM800L GSM GPRS Module

User Manuals: SIMCom SIM800L GSM GPRS Module

Manuals and User Guides for SIMCom SIM800L GSM GPRS Module. We have 1 SIMCom SIM800L GSM GPRS Module manual available for free PDF download: Hardware Design

SIMCom SIM800L Hardware Design

SIMCom SIM800L Hardware Design (64 pages)

Brand: SIMCom | Category: Recording Equipment | Size: 2 MB

Table of Contents

Table of Contents
3
Version History

10
1 Introduction

11
2 SIM800L Overview

11
- Sim800L
  11
- SIM800L Key Features
  11
- Operating Mode
  13
- Functional Diagram
  14
3 Package Information

15
- Pin out Diagram
  15
- Pin Description
  15
- Package Dimensions
  18
- Figure 4: Recommended Pcb Footprint Outline (Unit: MM)
  19
4 Application Interface

20
- Power Supply
  20
  - Power Supply Pin
    21
  - Monitoring Power Supply
    22
- Power On/Off Scenarios
  22
  - Power on SIM800L
    22
  - Power down SIM800L
    23
  - Reset Function
    24
- Power Saving Mode
  25
- RTC Backup
  27
- Serial Port and USB Interface
  28
  - Function of Serial Port
    28
  - Serial Interfaces
    29
  - Figure 21: Resistor Matching Circuit
    30
  - Debug Interface
    31
  - Software Upgrade
    32
- RI Behaviors
  32
- Audio Interfaces
  33
  - Speaker Interfaces Configuration
    34
  - Microphone Interfaces Configuration
    35
  - Audio Electronic Characteristic
    35
  - Tdd
    35
- SIM Card Interface
  36
- PCM Interface
  39
  - PCM Interface
    40
- Keypad Interface
  40
- Figure 37: 25 Keys Reference Circuit
  41
- I2C Bus
  42
- General Purpose Input/Output (GPIO)
  43
- Adc
  43
- Pwm
  44
- Table 26: Adc Specification
  44
- Network Status Indication
  45
- Operating Status Indication
  45
- LED Interface
  46
- RF Synchronization Signal
  46
- Antenna Interface
  47
5 PCB Layout

50
- Pin Assignment
  50
- Principle of PCB Layout
  50
  - Antenna Interface
    51
  - Power Supply
    51
  - SIM Card Interface
    51
  - Audio Interface
    51
  - Others
    51
- Recommended PCB Layout
  51
- Figure 51: Recommended Pcb Layout
  52
6 Electrical, Reliability and Radio Characteristics

53
- Absolute Maximum Ratings
  53
- Recommended Operating Conditions
  53
- Digital Interface Characteristics
  53
- SIM Card Interface Characteristics
  53
- SIM_VDD Characteristics
  54
- VDD_EXT Characteristics
  54
- VRTC Characteristics
  54
- Current Consumption (VBAT=3.8V)
  54
- Electro-Static Discharge
  55
- Radio Characteristics
  56
7 Manufacturing

58
8 Appendix

60
- Related Documents
  60
- Terms and Abbreviations
  61
- Safety Caution
  63

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