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author | Clay Murphy <claym@google.com> | 2014-11-05 21:22:58 +0000 |
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committer | Android (Google) Code Review <android-gerrit@google.com> | 2014-11-05 21:22:59 +0000 |
commit | 0d353863918004cdc5e3ee3a17cf0669552aedf7 (patch) | |
tree | 9cf6869e6d87886d8202d39056d944116fca4af9 | |
parent | eb45c31c99304da3ca810307c77bbf7d7580a9e5 (diff) | |
parent | 0bbc34a040c9868f80b55029c0e24d856db18cc5 (diff) | |
download | source.android.com-0d353863918004cdc5e3ee3a17cf0669552aedf7.tar.gz |
Merge "Docs: Adding note to Jack section and fixing headers" into lmp-dev
-rw-r--r-- | src/accessories/headset-spec.jd | 46 |
1 files changed, 25 insertions, 21 deletions
diff --git a/src/accessories/headset-spec.jd b/src/accessories/headset-spec.jd index 88b60231..d87c19ae 100644 --- a/src/accessories/headset-spec.jd +++ b/src/accessories/headset-spec.jd @@ -35,7 +35,7 @@ accessory followed by the specifications for the mobile device.</p> <p>The requirements in the following section apply to the headset accessory.</p> -<h2 id=functions>Functions</h2> +<h3 id=functions>Functions</h3> <table> <tr> @@ -72,7 +72,7 @@ accessory followed by the specifications for the mobile device.</p> </tr> </table> -<h2 id=control-function_mapping>Control-Function Mapping</h2> +<h3 id=control-function_mapping>Control-Function Mapping</h3> <table> <tr> @@ -146,7 +146,7 @@ following pattern: </ul> </ul> -<h2 id=mechanical>Mechanical</h2> +<h3 id=mechanical>Mechanical</h3> <table> <tr> @@ -204,7 +204,7 @@ following pattern: </tr> </table> -<h2 id=electrical>Electrical</h2> +<h3 id=electrical>Electrical</h3> <table> <tr> @@ -284,30 +284,34 @@ current Android Compatibility Definition Document (CDD)</p> </tr> </table> -<h2 id=reference_headset_test_circuit_1>Reference Headset Test Circuit 1</h2> +<h3 id=reference_headset_test_circuit_1>Reference Headset Test Circuit 1</h3> <img src="images/headset-circuit1.png" alt="Reference Headset Test Circuit 1" /> <p class="img-caption"><strong>Figure 1.</strong> Reference headset test circuit 1</p> -<p class="note"><strong>Note:</strong> Four-segment plug shows CTIA pinout. For OMTP pinout, please swap MIC and -GND segments</strong></p> +<p class="note"><strong>Note:</strong> Four-segment plug shows CTIA pinout. For +OMTP pinout, please swap MIC and GND segments.</p> -<h2 id=reference_headset_test_circuit_2>Reference Headset Test Circuit 2</h2> +<h3 id=reference_headset_test_circuit_2>Reference Headset Test Circuit 2</h3> <img src="images/headset-circuit2.png" alt="Reference Headset Test Circuit 2" /> <p class="img-caption"><strong>Figure 2.</strong> Reference headset test circuit 2</p> -<p><strong>Note</strong>: The second reference circuit above illustrates how the actual resistor values -(R1 - R4) will change based on the microphone capsule resistance to achieve the -equivalent impedance values as required by the specification. The example above -assumes a 5 kOhm microphone impedance. Therefore, as an example, to achieve an -equivalent R4 impedance of 135 Ohm, the actual R4 resistor value needs to be -139 Ohms.</p> +<p class="note"><strong>Note:</strong> The second reference circuit above +illustrates how the actual resistor values (R1 - R4) will change based on the +microphone capsule resistance to achieve the equivalent impedance values as +required by the specification. The example above assumes a 5 kOhm microphone +impedance. Therefore, as an example, to achieve an equivalent R4 impedance of +135 Ohm, the actual R4 resistor value needs to be 139 Ohms.</p> <h2 id=mobile_device_jack_specifications>Mobile Device (Jack) Specifications</h2> -<p>The requirements in the following section apply to the 3.5 mm jack on Android -mobile devices.</p> +<p class="caution"><strong>Caution:</strong> To achieve compatibility with the +headset specification above, devices that include a 4 conductor 3.5mm audio +jack must meet the following specifications. Please see the <em>Analog audio +ports</em> section of the <a +href="{@docRoot}compatibility/android-cdd.pdf">Android Compatibility Definition +Document (CDD)</a> for Android compatibility requirements.</p> <p><strong>Headset Jack Functions</strong></p> <table> @@ -345,7 +349,7 @@ mobile devices.</p> </tr> </table> -<h2 id=software_mapping>Software mapping</h2> +<h3 id=software_mapping>Software mapping</h3> <table> <tr> @@ -468,7 +472,7 @@ mobile devices.</p> </tr> </table> -<h2 id=mechanical11>Mechanical</h2> +<h3 id=mechanical11>Mechanical</h3> <table> <tr> @@ -526,9 +530,9 @@ detection due to slow insertion. </p> </tr> </table> -<h2 id=electrical12>Electrical</h2> +<h3 id=electrical12>Electrical</h3> -<h3 id=general>General</h3> +<h4 id=general>General</h4> <table> <tr> @@ -581,7 +585,7 @@ related to their respective function</p> </tr> </table> -<h3 id=function_impedance_and_threshold_detection>Function Impedance and Threshold Detection</h3> +<h4 id=function_impedance_and_threshold_detection>Function Impedance and Threshold Detection</h4> <p>Devices must detect the following resistor ladder on the accessories. The accessories will be tested to the standardized circuit diagram in the diagram |