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| Ethernet Media Access Controller (EMAC) Registers |
| Table 68. MAC Control Register (MACCONTROL) Field Descriptions (continued) | ||
Bit | Field | Value | Description |
5 | GMIIEN |
| GMII enable bit. |
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| 0 | GMII RX and TX are held in reset. |
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| 1 | GMII RX and TX are enabled for receive and transmit. |
4 | TXFLOWEN |
| Transmit flow control enable bit. This bit determines if incoming pause frames are acted upon |
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| in |
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| regardless of the TXFLOWEN bit setting. The RXMBPENABLE bits determine whether or not |
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| received pause frames are transferred to memory. |
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| 0 | Transmit flow control is disabled. |
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| upon. |
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| 1 | Transmit flow control is enabled. |
3 | RXBUFFERFLOWEN |
| Receive buffer flow control enable bit. |
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| 0 | Receive flow control is disabled. |
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| sent. |
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| 1 | Receive flow control is enabled. |
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| flow control is triggered. |
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| control is triggered. |
2 | Reserved | 0 | Reserved |
1 | LOOPBACK |
| Loopback mode. The loopback mode forces internal |
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| FULLDUPLEX bit setting. The loopback bit should be changed only when GMIIEN bit is |
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| deasserted. |
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| 0 | Loopback mode is disabled. |
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| 1 | Loopback mode is enabled. |
0 | FULLDUPLEX |
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| FULLDUPLEX bit setting |
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| 0 | |
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| 1 |
Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO) | 111 | |
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