The LatticeMico32 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.
*If the data sheet fails to open, see the note at the bottom of this page.
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Version |
Description |
|
3.1 (7.2) |
Updated the Edge Capture Register clean method Made IRQ Mask register readable |
|
3.0 (7.0 SP2) |
Cleaned up code. No function change. |
|
1.0 |
Initial release. |
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Parameter |
Description |
|
Instance Name |
Specifies the name of the GPIO instance. Alphanumeric values and underscores are supported. The default is gpio. |
|
Base Address |
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. |
|
Port Types |
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Output Ports Only |
Specifies the transfer mode of PIO ports as output only. This option is selected by default. |
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Input Ports Only |
Specifies the transfer mode of PIO ports as input only. This option is deselected by default. |
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Tristate Ports |
Specifies the transfer mode of PIO ports as tristate only. This option is deselected by default. |
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Both Input and Output |
Specifies the transfer mode of PIO ports as both input and output. This option is deselected by default. |
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Port Width |
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Data Width |
Specifies the width of the I/O port, in bits. Supported values are 1 to 32. The default is 1. |
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Input Width |
Specifies the input data bus width for an independent input/output GPIO, in bits. Supported values are 1 to 32. The default is 1. |
|
Output Width |
Specifies the output data bus width for an independent input/output GPIO, in bits. Supported values are 1 to 32. The default is 1. |
|
IRQ Mode |
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|
IRQ Mode |
Provides IRQ signal output when a specified event occurs on input ports. This option is deselected by default. |
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Level |
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. |
|
Edge |
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. |
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Edge Response |
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Either Edge |
Generates an IRQ on either low-to-high or high-to-low transitions. This option is deselected by default. |
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Positive Edge |
Generates an IRQ on low-to-high transitions. This option is selected by default. |
|
Negative Edge |
Generates an IRQ on high-to-low transitions. This option is deselected by default. |
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