用户手册 — Shenzhen Coban Electronics Co. Ltd. CB900

目录

• Introduction

  3
• Abbreviations

  3
• Safety Precautions

  4
• Technical Specifications

  5
• 2.1. General Specifications

  5
• GSM/ GPRS Specifications

  5
• RF Frequencies

  6
• Baseband Functionalities

  6
• 2.5. Interface Specifications

  6
• Functional Architecture

  7
• INTERFACES

  8
• Pin Assignments

  8
• Pin description

  9
• Power Supply and Ground

  11
• Operating Modes

  12
• Analog to Digital Converter (ADC)

  13
• Power ON Control

  13
• Subscriber Identity Module (SIM) Interface

  14
• 4.8. Serial Link (UART) Interfaces

  15
• 4.9. USB Interface

  17
• 4.10. Analog Audio Interfaces

  18
• Microphone input

  18
• Speaker

  19
• Earphone

  20
• 4.11. General Purposes Input / Output ports

  21
• Keyboard Interface

  21
• 2-Wire Serial Interface

  22
• RF interface

  22
• RF Performance

  22
• Recommendations

  22