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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>SAM4S RTT</title>
<link rel="stylesheet" type="text/css" href="css/html.css" media="all" />
</head>
<body id="abstract">
<div id="container">
<div id="content">
<a id="RTT"></a>
<h1>SAM4S RTT</h1>
<a id="RTT__User_Interface"></a>
<h2>Real-time Timer (RTT) User Interface</h2>
<!--As per 6081F programmer datasheet.-->
<h3>Registers</h3>
<table class="registers">
<caption>Register Mapping</caption>
<thead>
<tr>
<th class="address">Address</th>
<th class="description">Register</th>
<th class="name">Name</th>
<th class="access">Access</th>
<th class="reset">Reset</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td class="address" id="address_0x400E1430">0x400E1430</td>
<td class="description">Mode Register</td>
<td class="name">
<a href="#RTT_MR" title="Mode Register" class="one_click_away">RTT_MR</a>
</td>
<td class="access">read-write</td>
<td class="address">0x00008000</td>
</tr>
<tr class="even">
<td class="address" id="address_0x400E1434">0x400E1434</td>
<td class="description">Alarm Register</td>
<td class="name">
<a href="#RTT_AR" title="Alarm Register" class="one_click_away">RTT_AR</a>
</td>
<td class="access">read-write</td>
<td class="address">0xFFFFFFFF</td>
</tr>
<tr class="odd">
<td class="address" id="address_0x400E1438">0x400E1438</td>
<td class="description">Value Register</td>
<td class="name">
<a href="#RTT_VR" title="Value Register" class="one_click_away">RTT_VR</a>
</td>
<td class="access">read-only</td>
<td class="address">0x00000000</td>
</tr>
<tr class="even">
<td class="address" id="address_0x400E143C">0x400E143C</td>
<td class="description">Status Register</td>
<td class="name">
<a href="#RTT_SR" title="Status Register" class="one_click_away">RTT_SR</a>
</td>
<td class="access">read-only</td>
<td class="address">0x00000000</td>
</tr>
</tbody>
</table>
<h3>Register Fields</h3>
<h4 id="RTT_MR">RTT Mode Register</h4>
<p><strong>Name</strong>: RTT_MR</p>
<p><strong>Access</strong>: read-write</p>
<p><strong>Address</strong>: 0x400E1430</p>
<table class="fields">
<tbody>
<tr class="offsets">
<td>31</td>
<td>30</td>
<td>29</td>
<td>28</td>
<td>27</td>
<td>26</td>
<td>25</td>
<td>24</td>
</tr>
<tr class="fields">
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
</tr>
<tr class="offsets">
<td>23</td>
<td>22</td>
<td>21</td>
<td>20</td>
<td>19</td>
<td>18</td>
<td>17</td>
<td>16</td>
</tr>
<tr class="fields">
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td colspan="1">
<a href="#RTT_MR__RTTRST" title="Real-time Timer Restart">RTTRST</a>
</td>
<td colspan="1">
<a href="#RTT_MR__RTTINCIEN" title="Real-time Timer Increment Interrupt Enable">RTTINCIEN</a>
</td>
<td colspan="1">
<a href="#RTT_MR__ALMIEN" title="Alarm Interrupt Enable">ALMIEN</a>
</td>
</tr>
<tr class="offsets">
<td>15</td>
<td>14</td>
<td>13</td>
<td>12</td>
<td>11</td>
<td>10</td>
<td>9</td>
<td>8</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_MR__RTPRES" title="Real-time Timer Prescaler Value">RTPRES</a>
</td>
</tr>
<tr class="offsets">
<td>7</td>
<td>6</td>
<td>5</td>
<td>4</td>
<td>3</td>
<td>2</td>
<td>1</td>
<td>0</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_MR__RTPRES" title="Real-time Timer Prescaler Value">RTPRES</a>
</td>
</tr>
</tbody>
</table>
<ul class="values">
<li id="RTT_MR__RTPRES"><strong>RTPRES</strong>: Real-time Timer Prescaler Value</li>
<p>-</p>
<li id="RTT_MR__ALMIEN"><strong>ALMIEN</strong>: Alarm Interrupt Enable<table class="values"><thead><tr><th>Value</th><th>Name</th><th>Description</th></tr></thead><tbody><tr class="odd"><td class="value">0</td><td class="name">-</td><td class="description">The bit ALMS in RTT_SR has no effect on interrupt.</td></tr><tr class="even"><td class="value">1</td><td class="name">-</td><td class="description">The bit ALMS in RTT_SR asserts interrupt.</td></tr></tbody></table></li>
<li id="RTT_MR__RTTINCIEN"><strong>RTTINCIEN</strong>: Real-time Timer Increment Interrupt Enable<table class="values"><thead><tr><th>Value</th><th>Name</th><th>Description</th></tr></thead><tbody><tr class="odd"><td class="value">0</td><td class="name">-</td><td class="description">The bit RTTINC in RTT_SR has no effect on interrupt.</td></tr><tr class="even"><td class="value">1</td><td class="name">-</td><td class="description">The bit RTTINC in RTT_SR asserts interrupt.</td></tr></tbody></table></li>
<li id="RTT_MR__RTTRST"><strong>RTTRST</strong>: Real-time Timer Restart<table class="values"><thead><tr><th>Value</th><th>Name</th><th>Description</th></tr></thead><tbody><tr class="odd"><td class="value">0</td><td class="name">-</td><td class="description">No effect.</td></tr><tr class="even"><td class="value">1</td><td class="name">-</td><td class="description">Reloads and restarts the clock divider with the new programmed value. This also resets the 32-bit counter.</td></tr></tbody></table></li>
</ul>
<h4 id="RTT_AR">RTT Alarm Register</h4>
<p><strong>Name</strong>: RTT_AR</p>
<p><strong>Access</strong>: read-write</p>
<p><strong>Address</strong>: 0x400E1434</p>
<table class="fields">
<tbody>
<tr class="offsets">
<td>31</td>
<td>30</td>
<td>29</td>
<td>28</td>
<td>27</td>
<td>26</td>
<td>25</td>
<td>24</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_AR__ALMV" title="Alarm Value">ALMV</a>
</td>
</tr>
<tr class="offsets">
<td>23</td>
<td>22</td>
<td>21</td>
<td>20</td>
<td>19</td>
<td>18</td>
<td>17</td>
<td>16</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_AR__ALMV" title="Alarm Value">ALMV</a>
</td>
</tr>
<tr class="offsets">
<td>15</td>
<td>14</td>
<td>13</td>
<td>12</td>
<td>11</td>
<td>10</td>
<td>9</td>
<td>8</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_AR__ALMV" title="Alarm Value">ALMV</a>
</td>
</tr>
<tr class="offsets">
<td>7</td>
<td>6</td>
<td>5</td>
<td>4</td>
<td>3</td>
<td>2</td>
<td>1</td>
<td>0</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_AR__ALMV" title="Alarm Value">ALMV</a>
</td>
</tr>
</tbody>
</table>
<ul class="values">
<li id="RTT_AR__ALMV"><strong>ALMV</strong>: Alarm Value</li>
<p>-</p>
</ul>
<h4 id="RTT_VR">RTT Value Register</h4>
<p><strong>Name</strong>: RTT_VR</p>
<p><strong>Access</strong>: read-only</p>
<p><strong>Address</strong>: 0x400E1438</p>
<table class="fields">
<tbody>
<tr class="offsets">
<td>31</td>
<td>30</td>
<td>29</td>
<td>28</td>
<td>27</td>
<td>26</td>
<td>25</td>
<td>24</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_VR__CRTV" title="Current Real-time Value">CRTV</a>
</td>
</tr>
<tr class="offsets">
<td>23</td>
<td>22</td>
<td>21</td>
<td>20</td>
<td>19</td>
<td>18</td>
<td>17</td>
<td>16</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_VR__CRTV" title="Current Real-time Value">CRTV</a>
</td>
</tr>
<tr class="offsets">
<td>15</td>
<td>14</td>
<td>13</td>
<td>12</td>
<td>11</td>
<td>10</td>
<td>9</td>
<td>8</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_VR__CRTV" title="Current Real-time Value">CRTV</a>
</td>
</tr>
<tr class="offsets">
<td>7</td>
<td>6</td>
<td>5</td>
<td>4</td>
<td>3</td>
<td>2</td>
<td>1</td>
<td>0</td>
</tr>
<tr class="fields">
<td colspan="8">
<a href="#RTT_VR__CRTV" title="Current Real-time Value">CRTV</a>
</td>
</tr>
</tbody>
</table>
<ul class="values">
<li id="RTT_VR__CRTV"><strong>CRTV</strong>: Current Real-time Value</li>
<p>-</p>
</ul>
<h4 id="RTT_SR">RTT Status Register</h4>
<p><strong>Name</strong>: RTT_SR</p>
<p><strong>Access</strong>: read-only</p>
<p><strong>Address</strong>: 0x400E143C</p>
<table class="fields">
<tbody>
<tr class="offsets">
<td>31</td>
<td>30</td>
<td>29</td>
<td>28</td>
<td>27</td>
<td>26</td>
<td>25</td>
<td>24</td>
</tr>
<tr class="fields">
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
</tr>
<tr class="offsets">
<td>23</td>
<td>22</td>
<td>21</td>
<td>20</td>
<td>19</td>
<td>18</td>
<td>17</td>
<td>16</td>
</tr>
<tr class="fields">
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
</tr>
<tr class="offsets">
<td>15</td>
<td>14</td>
<td>13</td>
<td>12</td>
<td>11</td>
<td>10</td>
<td>9</td>
<td>8</td>
</tr>
<tr class="fields">
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
</tr>
<tr class="offsets">
<td>7</td>
<td>6</td>
<td>5</td>
<td>4</td>
<td>3</td>
<td>2</td>
<td>1</td>
<td>0</td>
</tr>
<tr class="fields">
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td>-</td>
<td colspan="1">
<a href="#RTT_SR__RTTINC" title="Real-time Timer Increment">RTTINC</a>
</td>
<td colspan="1">
<a href="#RTT_SR__ALMS" title="Real-time Alarm Status">ALMS</a>
</td>
</tr>
</tbody>
</table>
<ul class="values">
<li id="RTT_SR__ALMS"><strong>ALMS</strong>: Real-time Alarm Status<table class="values"><thead><tr><th>Value</th><th>Name</th><th>Description</th></tr></thead><tbody><tr class="odd"><td class="value">0</td><td class="name">-</td><td class="description">The Real-time Alarm has not occurred since the last read of RTT_SR.</td></tr><tr class="even"><td class="value">1</td><td class="name">-</td><td class="description">The Real-time Alarm occurred since the last read of RTT_SR.</td></tr></tbody></table></li>
<li id="RTT_SR__RTTINC"><strong>RTTINC</strong>: Real-time Timer Increment<table class="values"><thead><tr><th>Value</th><th>Name</th><th>Description</th></tr></thead><tbody><tr class="odd"><td class="value">0</td><td class="name">-</td><td class="description">The Real-time Timer has not been incremented since the last read of the RTT_SR.</td></tr><tr class="even"><td class="value">1</td><td class="name">-</td><td class="description">The Real-time Timer has been incremented since the last read of the RTT_SR.</td></tr></tbody></table></li>
</ul>
</div>
</div>
</body>
</html>