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<h1>LatticeMico GPIO &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a title="View Data Sheet" href="gpio.pdf" target="_blank" onmouseover="if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == 'Netscape')) ehlp_showtip(this,event,'View Data Sheet');" onmouseout="if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == 'Netscape')) ehlp_hidetip();"><img src="ds_icon_ast.jpg" x-maintain-ratio="TRUE" width="29px" height="31px" border="0" class="img_whs1"></a></h1>

<p>The LatticeMico general-purpose input/output core (GPIO) provides a 
 memory-mapped interface between a WISHBONE slave port and general-purpose 
 I/O ports. The I/O ports can connect to either on-chip or off-chip logic.</p>

<p class="whs2">*If the data sheet fails to open, see the 
 note at the bottom of this page.</p>

<h2>Revision History</h2>

&nbsp; 

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<col class="whs4">
<col class="whs5">

<tr valign="top" class="whs6">
<td bgcolor="#DEE8F4" width="85px" class="whs7">
<p class=Table
	style="font-weight: bold;">Version</td>
<td bgcolor="#DEE8F4" width="505px" class="whs8">
<p class=Table
	style="font-weight: bold;">Description</td></tr>

<tr valign="top" class="whs6">
<td colspan="1" rowspan="1" width="85px" class="whs9">
<p class=Table
	style="font-weight: normal;">3.3</td>
<td colspan="1" rowspan="1" width="505px" class="whs10">
<p class=Table>Added software support for LatticeMico8.
</td></tr>

<tr valign="top" class="whs6">
<td colspan="1" rowspan="1" width="85px" class="whs9">
<p class=Table
	style="font-weight: normal;">3.2 (8.1 SP1)</td>
<td colspan="1" rowspan="1" width="505px" class="whs10">
<p class=Table>WISHBONE data bus size is configurable to 8 or 32 bits. 
 Register map is updated to accommodate 8/32-bit WISHBONE data bus. </td></tr>

<tr valign="top" class="whs6">
<td colspan="1" rowspan="1" width="85px" class="whs9">
<p class=Table
	style="font-weight: normal;">3.1 (7.2)</td>
<td colspan="1" rowspan="1" width="505px" class="whs10">
<p class=Table>Updated the Edge Capture Register clean method</p>
<p class=Table>Made IRQ Mask register readable</td></tr>

<tr valign="top" class="whs6">
<td colspan="1" rowspan="1" width="85px" class="whs9">
<p class=Table
	style="font-weight: normal;">3.0 (7.0 SP2)</td>
<td colspan="1" rowspan="1" width="505px" class="whs10">
<p class=Table>Cleaned up code. No function change.</td></tr>

<tr valign="top" class="whs6">
<td colspan="1" rowspan="1" width="85px" class="whs9">
<p class=Table
	style="font-weight: normal;">1.0</td>
<td colspan="1" rowspan="1" width="505px" class="whs10">
<p class=Table>Initial release.</td></tr>
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<h2>Dialog Box Parameters</h2>

<table x-use-null-cells cellspacing="0" class="whs11">
<col class="whs4">
<col class="whs12">

<tr valign="top" class="whs13">
<td bgcolor="#DEE8F4" width="85px" class="whs14">
<p class=Table
	style="font-weight: bold;">Parameter</td>
<td bgcolor="#DEE8F4" width="503px" class="whs15">
<p class=Table
	style="font-weight: bold;">Description</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Instance Name</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Specifies the name of the GPIO instance. Alphanumeric values 
 and underscores are supported. The default is gpio.</td></tr>

<tr valign="top" class="whs13">
<td width="85px" class="whs16">
<p class=Table>Base Address</td>
<td width="503px" class="whs17">
<p class=Table>Specifies the base address for the device. The minimum boundary 
 alignment is 0X80. Supported values are 0X80000000 to 0XFFFFFF80. The 
 default is 0x80000000. If other components are included in the platform, 
 the allowable values will vary.</td></tr>

<tr valign="top" class="whs13">
<td colspan="2" rowspan="1" width="588px" class="whs18">
<p class=Table
	style="font-weight: bold;">Port Types</td>
</tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Output Ports Only</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Specifies the transfer mode of PIO ports as output only. 
 This option is selected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs19">
<p class=Table>Input Ports Only</td>
<td colspan="1" rowspan="1" width="503px" class="whs20">
<p class=Table>Specifies the transfer mode of PIO ports as input only. 
 This option is deselected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Tristate Ports</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Specifies the transfer mode of PIO ports as tristate only. 
 This option is deselected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs19">
<p class=Table>Both Input and Output</td>
<td colspan="1" rowspan="1" width="503px" class="whs20">
<p class=Table>Specifies the transfer mode of PIO ports as both input and 
 output. This option is deselected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="2" rowspan="1" width="588px" class="whs18">
<p class=Table
	style="font-weight: bold;">Port Width</td>
</tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Data Width</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Specifies the width of the I/O port, in bits. Supported 
 values are 1 to 32. The default is 1.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs19">
<p class=Table>Input Width</td>
<td colspan="1" rowspan="1" width="503px" class="whs20">
<p class=Table>Specifies the input data bus width for an independent input/output 
 GPIO, in bits. Supported values are 1 to 32. The default is 1.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Output Width</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Specifies the output data bus width for an independent input/output 
 GPIO, in bits. Supported values are 1 to 32. The default is 1.</td></tr>

<tr valign="top" class="whs13">
<td colspan="2" rowspan="1" width="588px" class="whs21">
<p class=Table
	style="font-weight: bold;">IRQ Mode</td>
</tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs19">
<p class=Table>IRQ Mode</td>
<td colspan="1" rowspan="1" width="503px" class="whs20">
<p class=Table>Provides IRQ signal output when a specified event occurs 
 on input ports. This option is deselected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Level</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Generates an IRQ whenever a specific input is high and interrupts 
 have been enabled for that input in the IRQ-MASK register. This option 
 is deselected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs19">
<p class=Table>Edge</td>
<td colspan="1" rowspan="1" width="503px" class="whs20">
<p class=Table>Generates an IRQ whenever a specific bit in the edge capture 
 register is high and interrupts have been enabled for that bit in the 
 IRQ-MASK register. This option is selected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="2" rowspan="1" width="588px" class="whs18">
<p class=Table
	style="font-weight: bold;">Edge Response</td>
</tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Either Edge</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Generates an IRQ on either low-to-high or high-to-low transitions. 
 This option is deselected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs19">
<p class=Table>Positive Edge</td>
<td colspan="1" rowspan="1" width="503px" class="whs20">
<p class=Table>Generates an IRQ on low-to-high transitions. This option 
 is selected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>Negative Edge</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Generates an IRQ on high-to-low transitions. This option 
 is deselected by default.</td></tr>

<tr valign="top" class="whs13">
<td colspan="2" rowspan="1" width="85px" class="whs16">
<p class=Table
	style="font-weight: bold;">WISHBONE Configuration</td>
</tr>

<tr valign="top" class="whs13">
<td colspan="1" rowspan="1" width="85px" class="whs16">
<p class=Table>WISHBONE Data Bus Width</td>
<td colspan="1" rowspan="1" width="503px" class="whs17">
<p class=Table>Specifies the WISHBONE data bus width in bits. Supported 
 values are 8 and 32. The default is 32.</td></tr>
</table>

&nbsp; 

<p><span style="font-weight: bold;"><B>Note</B></span>: If the data sheet fails 
 to open, click <img src="qm_icon.jpg" x-maintain-ratio="TRUE" width="14px" height="16px" border="0" class="img_whs22"> on the Available Components toolbar, and 
 then click the note button.</p>

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