Manuali utente per Telit Wireless Solutions GM862-GPS

Sommario

• Overview

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• Hardware Commands

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• Turning ON the GM862-GPS

  5
• Turning OFF the GM862-GPS

  7
• Hardware shutdown

  7
• Hardware Unconditional Reboot

  8
• Power Supply

  10
• Power Supply Requirements

  10
• General Design Rules

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• Electrical design Guidelines

  11
• 3.2.1.1 + 5V input Source Power Supply Design Guidelines

  11
• 3.2.1.2 + 12V input Source Power Supply Design Guidelines

  13
• 3.2.1.3 Battery Source Power Supply Design Guidelines

  14
• 3.2.1.4 Battery Charge control Circuitry Design Guidelines

  15
• Thermal Design Guidelines

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• Power Supply PCB layout Guidelines

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• Serial Ports

  19
• level translation

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• 5V UART level translation

  23
• Audio Section Overview

  25
• Microphone paths characteristic and requirements

  27
• General Design Rules

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• Other considerations .

  30
• Microphone Biasing

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• Balanced Microphone biasing

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• Unbalanced Microphone biasing

  32
• Microphone buffering

  34
• Buffered Balanced Mic

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• Buffered Unbalanced (Single Ended) Microphone .

  36
• OUTPUT LINES (Speaker)

  39
• Short description

  39
• Output lines characteristics .

  40
• General Design rules

  41