at91sam7se512_ebi.html

基于AT91SAM7SE512cpu的flash访问例子

<tr><td bgcolor="#FFFFCC"><font size="-1"><b>NCS4_CFCS0</b></font></td><td><font size="-1"><i><font size="-1">(<a href="AT91SAM7SE512_h.html#AT91C_PA19_NCS4_CFCS0">AT91C_PA19_NCS4_CFCS0</a>)</font></i></font></td><td><font size="-1"><a href="#PIOA">PIOA</a>  Periph: B Bit: 19</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A18</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC16_A18     ">AT91C_PC16_A18     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: A Bit: 16</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A17_BA1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PB17_A17_BA1 ">AT91C_PB17_A17_BA1 </a>)</font></i></font></td><td><font size="-1"><a href="#PIOB">PIOB</a>  Periph: B Bit: 17</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A17_BA1</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PA17_A17_BA1 ">AT91C_PA17_A17_BA1 </a>)</font></i></font></td><td><font size="-1"><a href="#PIOA">PIOA</a>  Periph: B Bit: 17</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A19</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC17_A19     ">AT91C_PC17_A19     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: A Bit: 17</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>CAS</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PA28_CAS     ">AT91C_PA28_CAS     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOA">PIOA</a>  Periph: B Bit: 28</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>NCS7</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC20_NCS7    ">AT91C_PC20_NCS7    </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: B Bit: 20</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A25_CFRNW</b></font></td><td><font size="-1"><i><font size="-1">(<a href="AT91SAM7SE512_h.html#AT91C_PC23_A25_CFRNW">AT91C_PC23_A25_CFRNW</a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: A Bit: 23</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>NWR1_NBS1_CFIOR_NUB</b></font></td><td><font size="-1"><i><font size="-1">(<a href="AT91SAM7SE512_h.html#AT91C_PA23_NWR1_NBS1_CFIOR_NUB">AT91C_PA23_NWR1_NBS1_CFIOR_NUB</a>)</font></i></font></td><td><font size="-1"><a href="#PIOA">PIOA</a>  Periph: B Bit: 23</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>NANDOE</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC17_NANDOE  ">AT91C_PC17_NANDOE  </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: B Bit: 17</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A20</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC18_A20     ">AT91C_PC18_A20     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: A Bit: 18</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A21</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC19_A21     ">AT91C_PC19_A21     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: A Bit: 19</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>NANDWE</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC18_NANDWE  ">AT91C_PC18_NANDWE  </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: B Bit: 18</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A22</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC20_A22     ">AT91C_PC20_A22     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: A Bit: 20</font></td><td><font size="-1"></font></td></tr>
<tr><td bgcolor="#FFFFCC"><font size="-1"><b>A23</b></font></td><td><font size="-1"><i><font size="-1">(<a href="#AT91C_PC21_A23     ">AT91C_PC21_A23     </a>)</font></i></font></td><td><font size="-1"><a href="#PIOC">PIOC</a>  Periph: A Bit: 21</font></td><td><font size="-1"></font></td></tr>
</null></table><br><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><font size="-1"><b>Function</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Description</b></font></th><tr><td bgcolor="#FFFFCC"><font size="-1"><b><a href="lib_AT91SAM7SE512_h.html#AT91F_EBI_CfgPIO">AT91F_EBI_CfgPIO</a></b></font></td><td><font size="-1">Configure PIO controllers to drive EBI signals</font></td></tr>
</null></table><br><br></null><a name="EBI"></a><h2>EBI Software API <i><font size="-1">(<a href="AT91SAM7SE512_h.html#AT91S_EBI">AT91S_EBI</a>)</font></i></h2>
<a name="EBI"></a><null><table border=1 cellpadding=0 cellspacing=0 width="100%"><null><th bgcolor="#FFFFCC"><font size="-1"><b>Offset</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Field</b></font></th><th bgcolor="#FFFFCC"><font size="-1"><b>Description</b></font></th>
<tr><td align="CENTER" bgcolor="#FFFFCC"><font size="-1"><b>0x0</b></font></td><td><font size="-1"><a href="AT91SAM7SE512_EBI.html#EBI_CSA">EBI_CSA</a></font></td><td><font size="-1">EBI Chip Select Assignment Register</font></td></tr>
</null></table><br></null><h2>EBI Register Description</h2>
<null><a name="EBI_CSA"></a><h4><a href="#EBI">EBI</a>: <i><a href="AT91SAM7SE512_h.html#AT91_REG">AT91_REG</a></i> EBI_CSA  <i>EBI Chip Select Assignment Register</i></h4><ul><null><font size="-2"><li><b>EBI</b> <i><a href="AT91SAM7SE512_h.html#AT91C_EBI_CSA">AT91C_EBI_CSA</a></i> 0xFFFFFF80</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><tr><td align="CENTER" bgcolor="#FFFFCC">1</td><td align="CENTER"><a name="EBI_CS1A"></a><b>EBI_CS1A</b><font size="-2"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS1A">AT91C_EBI_CS1A</a></font></td><td><b>Chip Select 1 Assignment</b><br>0 = Chip Select 1 is assigned to the Static Memory Controller.n1 = Chip Select 1 is assigned to the SDRAM Controller.<font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="EBI_CS1A_SMC"></a><b>EBI_CS1A_SMC</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS1A_SMC">AT91C_EBI_CS1A_SMC</a></font></td><td><br>Chip Select 1 is assigned to the Static Memory Controller.</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="EBI_CS1A_SDRAMC"></a><b>EBI_CS1A_SDRAMC</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS1A_SDRAMC">AT91C_EBI_CS1A_SDRAMC</a></font></td><td><br>Chip Select 1 is assigned to the SDRAM Controller.</td></tr>
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<tr><td align="CENTER" bgcolor="#FFFFCC">2</td><td align="CENTER"><a name="EBI_CS2A"></a><b>EBI_CS2A</b><font size="-2"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS2A">AT91C_EBI_CS2A</a></font></td><td><b>Chip Select 2 Assignment</b><br>0 = Chip Select 2 is assigned to the Static Memory Controller and NCS2, NCS5 and NCS6 behave as defined by the SMC.n1 = Chip Select 2 is assigned to the Static Memory Controller and the CompactFlash Logic (second slot) is actived. Accesing the address space reserved to NCS5 and NCS6 may lead to an unpedictable outcome<font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="EBI_CS2A_SMC"></a><b>EBI_CS2A_SMC</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS2A_SMC">AT91C_EBI_CS2A_SMC</a></font></td><td><br>Chip Select 2 is assigned to the Static Memory Controller and NCS2, NCS5 and NCS6 behave as defined by the SMC.</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="EBI_CS2A_SMC_CompactFlash"></a><b>EBI_CS2A_SMC_CompactFlash</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS2A_SMC_CompactFlash">AT91C_EBI_CS2A_SMC_CompactFlash</a></font></td><td><br>Chip Select 2 is assigned to the Static Memory Controller and the CompactFlash Logic (second slot) is actived. Accesing the address space reserved to NCS5 and NCS6 may lead to an unpedictable outcome</td></tr>
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<tr><td align="CENTER" bgcolor="#FFFFCC">3</td><td align="CENTER"><a name="EBI_CS3A"></a><b>EBI_CS3A</b><font size="-2"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS3A">AT91C_EBI_CS3A</a></font></td><td><b>Chip Select 3 Assignment</b><br>0 = Chip Select 3 is only assigned to the Static Memory Controller and NCS3 behaves as defined by the SMC2.n1 = Chip Select 3 is assigned to the Static Memory Controller and the NAND Flash Logic is activated.<font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="EBI_CS3A_SMC"></a><b>EBI_CS3A_SMC</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS3A_SMC">AT91C_EBI_CS3A_SMC</a></font></td><td><br>Chip Select 3 is only assigned to the Static Memory Controller and NCS3 behaves as defined by the SMC2.</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="EBI_CS3A_SMC_NandFlash"></a><b>EBI_CS3A_SMC_NandFlash</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS3A_SMC_NandFlash">AT91C_EBI_CS3A_SMC_NandFlash</a></font></td><td><br>Chip Select 3 is assigned to the Static Memory Controller and the NAND Flash Logic is activated.</td></tr>
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<tr><td align="CENTER" bgcolor="#FFFFCC">4</td><td align="CENTER"><a name="EBI_CS4A"></a><b>EBI_CS4A</b><font size="-2"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS4A">AT91C_EBI_CS4A</a></font></td><td><b>Chip Select 4 Assignment</b><br>Chip Select 4 is assigned to the Static Memory Controller and NCS2, NCS5 and NCS6 behave as defined by the SMC.n1 = Chip Select 4 is assigned to the Static Memory Controller and the CompactFlash Logic (first slot) is actived. Accesing the address space reserved to NCS5 and NCS6 may lead to an unpedictable outcome<font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="EBI_CS4A_SMC"></a><b>EBI_CS4A_SMC</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS4A_SMC">AT91C_EBI_CS4A_SMC</a></font></td><td><br>Chip Select 4 is assigned to the Static Memory Controller and NCS2, NCS5 and NCS6 behave as defined by the SMC.</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="EBI_CS4A_SMC_CompactFlash"></a><b>EBI_CS4A_SMC_CompactFlash</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_CS4A_SMC_CompactFlash">AT91C_EBI_CS4A_SMC_CompactFlash</a></font></td><td><br>Chip Select 4 is assigned to the Static Memory Controller and the CompactFlash Logic (first slot) is actived. Accesing the address space reserved to NCS5 and NCS6 may lead to an unpedictable outcome</td></tr>
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<tr><td align="CENTER" bgcolor="#FFFFCC">16</td><td align="CENTER"><a name="EBI_NWPC"></a><b>EBI_NWPC</b><font size="-2"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_NWPC">AT91C_EBI_NWPC</a></font></td><td><b>NWait Pin Configuration</b><br>0 = The NWAIT device pin is not connected to the External Wait Request input of the Staitc Memory Controller ,this multiplexe pin can be used as a PIO<br>1 =The NWAIT device pin is connected to the External Wait Request input of the Staitc Memory Controller.<font size="-1"><table bgcolor="#E3F2FF" border=1 cellpadding=0 cellspacing=0 width="100%"><null><th><b>Value</b></th><th><b>Label</b></th><th><b>Description</b></th><tr><td align="CENTER">0</td><td align="CENTER"><a name="EBI_NWPC_OFF"></a><b>EBI_NWPC_OFF</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_NWPC_OFF">AT91C_EBI_NWPC_OFF</a></font></td><td><br>The NWAIT device pin is not connected to the External Wait Request input of the Static Memory Controller ,this multiplexe pin can be used as a PIO.</td></tr>
<tr><td align="CENTER">1</td><td align="CENTER"><a name="EBI_NWPC_ON"></a><b>EBI_NWPC_ON</b><font size="-1"><br><a href="AT91SAM7SE512_h.html#AT91C_EBI_NWPC_ON">AT91C_EBI_NWPC_ON</a></font></td><td><br>The NWAIT device pin is connected to the External Wait Request input of the Static Memory Controller.</td></tr>
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