Connect Tech Blue Heat/Net Sync User Manual
Interrupts
| INT * |
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| Usage |
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| /INT1, /INT2 |
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| IUSC logically |
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| One use is to mux all ports configured for Async mode to one IRQ and all ports |
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| configured for Sync mode to another interrupt. This should facilitate better software |
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| architecture and operation. |
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| /INT3 |
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| PLD Interrupt. To support miscellaneous PLD section functions. |
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| /INT6 |
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| Ethernet PHY Interrupt. Same PHY as other MCF5272 based Blue Heat/Net models. |
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*INTs are active low. Unused interrupts are pulled up to V+.
Table 6: Interrupts
ColdFire MCF5272 GPIO
| GPIO Bit(s) * |
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| Direction |
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| Usage |
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PA0 – PA4, |
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| Undefined |
| Undefined. For future expansion or debugging purposes. Available on |
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PA6 |
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| debug header P11 on page 8 of Schematic |
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PA5 |
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| Output |
| CPU Status LED. |
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| 1 | = LED Off |
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| 0 | = LED On. |
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PA8 – PA11 |
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| Input |
| PCB ID. Should be 0x4, for BHN Sync 4 Port. |
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PA13 |
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| Input |
| Pushbutton input. |
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| 1 | = not pushed |
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| 0 | = pushed |
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PA14 |
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| Output |
| Software forced hardware reset. |
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| 1 | = Not reset. When setting up this GPIO, be sure to set port to a „1‟ |
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| before changing direction to output. |
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| 0 | = forces a hardware reset |
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Table 7: ColdFire MCF5272 GPIO
* All unused GPIO is pulled up with a pullup resistor.
Base Address Map
| Item |
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| Address Range (hex) |
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| ColdFire MBAR |
| 1000 0000 |
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| Internal SRAM (4k Byte) |
| 2000 0000 |
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| IUSC 0 |
| 4000 0000 |
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| IUSC 1 |
| 4000 0400 |
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| IUSC 2 |
| 4000 0800 |
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| IUSC 3 |
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| 4000 0C00 |
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| PLD registers |
| 4000 1000 |
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| DPR (32k Byte SRAM) |
| 8000 0000 |
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| Flash (8 M Byte ) |
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| FE00 0000 |
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Table 8: Base Address Map
Revision 0.03 | 49 |
