at91sam7a3_sys.html

1、程序目的：介绍AT91SAM7S256-EK TWI的基本用法： 2、 功能说明:通过TWI实现I2C

<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x6A4</b></font></td><td><font size="-1">PIOB_OWDR (<a href="#PIO_OWDR">PIO_OWDR</a>)</font></td><td><font size="-1">Output Write Disable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x6A8</b></font></td><td><font size="-1">PIOB_OWSR (<a href="#PIO_OWSR">PIO_OWSR</a>)</font></td><td><font size="-1">Output Write Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC00</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_SCER">PMC_SCER</a></font></td><td><font size="-1">System Clock Enable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC04</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_SCDR">PMC_SCDR</a></font></td><td><font size="-1">System Clock Disable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC08</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_SCSR">PMC_SCSR</a></font></td><td><font size="-1">System Clock Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC10</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_PCER">PMC_PCER</a></font></td><td><font size="-1">Peripheral Clock Enable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC14</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_PCDR">PMC_PCDR</a></font></td><td><font size="-1">Peripheral Clock Disable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC18</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_PCSR">PMC_PCSR</a></font></td><td><font size="-1">Peripheral Clock Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC20</b></font></td><td><font size="-1">PMC_MOR (<a href="AT91SAM7A3_CKGR.html#CKGR_MOR">CKGR_MOR</a>)</font></td><td><font size="-1">Main Oscillator Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC24</b></font></td><td><font size="-1">PMC_MCFR (<a href="AT91SAM7A3_CKGR.html#CKGR_MCFR">CKGR_MCFR</a>)</font></td><td><font size="-1">Main Clock  Frequency Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC2C</b></font></td><td><font size="-1">PMC_PLLR (<a href="AT91SAM7A3_CKGR.html#CKGR_PLLR">CKGR_PLLR</a>)</font></td><td><font size="-1">PLL Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC30</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_MCKR">PMC_MCKR</a></font></td><td><font size="-1">Master Clock Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC40</b></font></td><td><font size="-1">PMC_PCKR[4] (<a href="AT91SAM7A3_PMC.html#PMC_PCKR">PMC_PCKR</a>)</font></td><td><font size="-1">Programmable Clock Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC60</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_IER">PMC_IER</a></font></td><td><font size="-1">Interrupt Enable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC64</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_IDR">PMC_IDR</a></font></td><td><font size="-1">Interrupt Disable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC68</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_SR">PMC_SR</a></font></td><td><font size="-1">Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xC6C</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PMC.html#PMC_IMR">PMC_IMR</a></font></td><td><font size="-1">Interrupt Mask Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD00</b></font></td><td><font size="-1"><a href="AT91SAM7A3_RSTC.html#RSTC_RCR">RSTC_RCR</a></font></td><td><font size="-1">Reset Control Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD04</b></font></td><td><font size="-1"><a href="AT91SAM7A3_RSTC.html#RSTC_RSR">RSTC_RSR</a></font></td><td><font size="-1">Reset Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD08</b></font></td><td><font size="-1"><a href="AT91SAM7A3_RSTC.html#RSTC_RMR">RSTC_RMR</a></font></td><td><font size="-1">Reset Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD10</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SHDWC.html#SHDWC_SHCR">SHDWC_SHCR</a></font></td><td><font size="-1">Shut Down Control Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD14</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SHDWC.html#SHDWC_SHMR">SHDWC_SHMR</a></font></td><td><font size="-1">Shut Down Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD18</b></font></td><td><font size="-1"><a href="AT91SAM7A3_SHDWC.html#SHDWC_SHSR">SHDWC_SHSR</a></font></td><td><font size="-1">Shut Down Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD20</b></font></td><td><font size="-1"><a href="AT91SAM7A3_RTTC.html#RTTC_RTMR">RTTC_RTMR</a></font></td><td><font size="-1">Real-time Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD24</b></font></td><td><font size="-1"><a href="AT91SAM7A3_RTTC.html#RTTC_RTAR">RTTC_RTAR</a></font></td><td><font size="-1">Real-time Alarm Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD28</b></font></td><td><font size="-1"><a href="AT91SAM7A3_RTTC.html#RTTC_RTVR">RTTC_RTVR</a></font></td><td><font size="-1">Real-time Value Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD2C</b></font></td><td><font size="-1"><a href="AT91SAM7A3_RTTC.html#RTTC_RTSR">RTTC_RTSR</a></font></td><td><font size="-1">Real-time Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD30</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PITC.html#PITC_PIMR">PITC_PIMR</a></font></td><td><font size="-1">Period Interval Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD34</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PITC.html#PITC_PISR">PITC_PISR</a></font></td><td><font size="-1">Period Interval Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD38</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PITC.html#PITC_PIVR">PITC_PIVR</a></font></td><td><font size="-1">Period Interval Value Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD3C</b></font></td><td><font size="-1"><a href="AT91SAM7A3_PITC.html#PITC_PIIR">PITC_PIIR</a></font></td><td><font size="-1">Period Interval Image Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD40</b></font></td><td><font size="-1"><a href="AT91SAM7A3_WDTC.html#WDTC_WDCR">WDTC_WDCR</a></font></td><td><font size="-1">Watchdog Control Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD44</b></font></td><td><font size="-1"><a href="AT91SAM7A3_WDTC.html#WDTC_WDMR">WDTC_WDMR</a></font></td><td><font size="-1">Watchdog Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD48</b></font></td><td><font size="-1"><a href="AT91SAM7A3_WDTC.html#WDTC_WDSR">WDTC_WDSR</a></font></td><td><font size="-1">Watchdog Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD50</b></font></td><td><font size="-1">SYS_GPBR0 (<a href="#GPBR">GPBR</a>)</font></td><td><font size="-1">General Purpose Register 0</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xD54</b></font></td><td><font size="-1">SYS_GPBR1 (<a href="#GPBR">GPBR</a>)</font></td><td><font size="-1">General Purpose Register 1</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF00</b></font></td><td><font size="-1"><a href="#MC_RCR">MC_RCR</a></font></td><td><font size="-1">MC Remap Control Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF04</b></font></td><td><font size="-1"><a href="#MC_ASR">MC_ASR</a></font></td><td><font size="-1">MC Abort Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF08</b></font></td><td><font size="-1"><a href="#MC_AASR">MC_AASR</a></font></td><td><font size="-1">MC Abort Address Status Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF10</b></font></td><td><font size="-1">MC_PUIA[16] (<a href="#MC_PUIA">MC_PUIA</a>)</font></td><td><font size="-1">MC Protection Unit Area</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF50</b></font></td><td><font size="-1"><a href="#MC_PUP">MC_PUP</a></font></td><td><font size="-1">MC Protection Unit Peripherals</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF54</b></font></td><td><font size="-1"><a href="#MC_PUER">MC_PUER</a></font></td><td><font size="-1">MC Protection Unit Enable Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF60</b></font></td><td><font size="-1"><a href="#MC_FMR">MC_FMR</a></font></td><td><font size="-1">MC Flash Mode Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF64</b></font></td><td><font size="-1"><a href="#MC_FCR">MC_FCR</a></font></td><td><font size="-1">MC Flash Command Register</font></td></tr>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0xF68</b></font></td><td><font size="-1"><a href="#MC_FSR">MC_FSR</a></font></td><td><font size="-1">MC Flash Status Register</font></td></tr>
</null></table><br></null><h2>SYS Register Description</h2>
<null><a name="SYS_AIC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_AIC">AT91S_AIC</a></i> SYS_AIC  <i>Advanced Interrupt Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_AIC">AT91C_SYS_AIC</a></i> 0xFFFFF000</font></null></ul><a name="SYS_DBGU"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_DBGU">AT91S_DBGU</a></i> SYS_DBGU  <i>Debug Unit</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_DBGU">AT91C_SYS_DBGU</a></i> 0xFFFFF200</font></null></ul><a name="SYS_PIOA"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_PIO">AT91S_PIO</a></i> SYS_PIOA  <i>PIO Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_PIOA">AT91C_SYS_PIOA</a></i> 0xFFFFF400</font></null></ul><a name="SYS_PIOB"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_PIO">AT91S_PIO</a></i> SYS_PIOB  <i>PIO Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_PIOB">AT91C_SYS_PIOB</a></i> 0xFFFFF600</font></null></ul><a name="SYS_PMC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_PMC">AT91S_PMC</a></i> SYS_PMC  <i>Power Management Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_PMC">AT91C_SYS_PMC</a></i> 0xFFFFFC00</font></null></ul><a name="SYS_RSTC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_RSTC">AT91S_RSTC</a></i> SYS_RSTC  <i>Reset Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_RSTC">AT91C_SYS_RSTC</a></i> 0xFFFFFD00</font></null></ul><a name="SYS_SHDWC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_SHDWC">AT91S_SHDWC</a></i> SYS_SHDWC  <i>Shut Down Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_SHDWC">AT91C_SYS_SHDWC</a></i> 0xFFFFFD10</font></null></ul><a name="SYS_RTTC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_RTTC">AT91S_RTTC</a></i> SYS_RTTC  <i>Real Time Timer Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_RTTC">AT91C_SYS_RTTC</a></i> 0xFFFFFD20</font></null></ul><a name="SYS_PITC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_PITC">AT91S_PITC</a></i> SYS_PITC  <i>Periodic Interval Timer Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_PITC">AT91C_SYS_PITC</a></i> 0xFFFFFD30</font></null></ul><a name="SYS_WDTC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_WDTC">AT91S_WDTC</a></i> SYS_WDTC  <i>Watchdog Timer Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_WDTC">AT91C_SYS_WDTC</a></i> 0xFFFFFD40</font></null></ul><a name="SYS_GPBR0"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91_REG">AT91_REG</a></i> SYS_GPBR0  <i>General Purpose Register 0</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="AT91SAM7A3_h.html#AT91C_SYS_GPBR0">AT91C_SYS_GPBR0</a></i> 0xFFFFFD50</font></null></ul><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><b>Offset</b></th><th bgcolor="#FFFFCC"><b>Name</b></th><th bgcolor="#FFFFCC"><b>Description</b></th></null></table>
<a name="SYS_GPBR1"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91_REG">AT91_REG</a></i> SYS_GPBR1  <i>General Purpose Register 1</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="AT91SAM7A3_h.html#AT91C_SYS_GPBR1">AT91C_SYS_GPBR1</a></i> 0xFFFFFD54</font></null></ul><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><b>Offset</b></th><th bgcolor="#FFFFCC"><b>Name</b></th><th bgcolor="#FFFFCC"><b>Description</b></th></null></table>
<a name="SYS_MC"></a><h4><a href="#SYS">SYS</a>: <i><a href="AT91SAM7A3_h.html#AT91S_MC">AT91S_MC</a></i> SYS_MC  <i>Memory Controller</i></h4><ul><null><font size="-2"><li><b>SYS</b> <i><a href="#AT91C_SYS_MC">AT91C_SYS_MC</a></i> 0xFFFFFF00</font></null></ul></null><hr></html>