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Datasheet
BITS |
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| TYPE | DEFAULT |
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10:8 | GPIO Direction |
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| R/W | 000b | |||||
| When set, enables the corresponding GPIO as an output. When cleared the |
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| GPIO is enabled as an input. Bits are assigned as follows: |
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| GPIO0 – bit 8 |
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| GPIO1 – bit 9 |
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| GPIO2 – bit 10 |
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7:5 | RESERVED |
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| RO | - | ||
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4:3 | GPO Data |
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| R/W | 00b | ||||
| The value written is reflected on GPOn. Bits are assigned as follows: |
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| GPO3 – bit 3 |
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| GPO4 – bit 4 |
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2:0 | GPIO Data |
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| R/W | |||||
| When enabled as an output, the value written is reflected on GPIOn. When |
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| read, GPIOn reflects the current state of the corresponding GPIO pin. Bits |
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| are assigned as follows: |
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| GPIO0 – bit 0 |
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| GPIO1 – bit 1 |
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| GPIO2 – bit 2 |
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| Note 4.2 Default value is dependent on the state of the GPIO pin. |
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| Table 4.3 EEPROM Enable Bit Definitions |
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[22] |
| [21] |
| [20] |
| EEDIO FUNCTION |
| EECLK FUNCTION | ||
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0 |
| 0 |
| 0 |
| EEDIO |
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| EECLK |
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0 |
| 0 |
| 1 |
| GPO3 |
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| GPO4 |
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0 |
| 1 |
| 0 |
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| Reserved |
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0 |
| 1 |
| 1 |
| GPO3 |
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| RX_DV |
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1 |
| 0 |
| 0 |
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| Reserved |
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1 |
| 0 |
| 1 |
| TX_EN |
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| GPO4 |
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1 |
| 1 |
| 0 |
| TX_EN |
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| RX_DV |
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1 |
| 1 |
| 1 |
| TX_CLK |
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| RX_CLK |
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SMSC LAN9420/LAN9420i | 93 | Revision 1.22 |
| DATASHEET |
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