Two Port 10/100 Managed Ethernet Switch with
Datasheet
BITS |
| DESCRIPTION | TYPE |
| DEFAULT | |
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3 | Flow Control on Multicast Frame (FCMULT) | R/W |
| 0b | ||
| When this bit is set, the Host MAC will assert back pressure when the AFC |
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| level is reached and a multicast frame is received. This field has no function |
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| in |
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| 0: Flow Control on Multicast Frame Disabled |
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| 1: Flow Control on Multicast Frame Enabled |
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2 | Flow Control on Broadcast Frame (FCBRD) | R/W |
| 0b | ||
| When this bit is set, the Host MAC will assert back pressure when the AFC |
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| level is reached and a broadcast frame is received. This field has no function |
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| in |
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| 0: Flow Control on Broadcast Frame Disabled |
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| 1: Flow Control on Broadcast Frame Enabled |
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1 | Flow Control on Address Decode (FCADD) | R/W |
| 0b | ||
| When this bit is set, the Host MAC will assert back pressure when the AFC |
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| level is reached and a frame addressed to the Host MAC is received. This |
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| field has no function in |
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| 0: Flow Control on Address Decode Disabled |
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| 1: Flow Control on Address Decode Enabled |
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0 | Flow Control on Any Frame (FCANY) | R/W |
| 0b | ||
| When this bit is set, the Host MAC will assert back pressure, or transmit a |
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| pause frame when the AFC level is reached and any frame is received. |
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| Setting this bit enables |
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| operating in |
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| When this mode is enabled during |
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| does not decode the Host MAC address and will send a JAM upon receipt |
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| of a valid preamble (i.e., immediately at the beginning of the next frame after |
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| the RX Data FIFO level is reached). |
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| When this mode is enabled during |
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| will immediately instruct the Host MAC to send a pause frame when the RX |
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| Data FIFO level is reached. The MAC will queue the pause frame |
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| transmission for the next available window. |
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| Setting this bit overrides bits [3:1] of this register. |
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| Table 14.2 Backpressure Duration Bit Mapping |
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| BACKPRESSURE DURATION |
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| [7:4] | 100Mbs Mode |
| 10Mbs Mode |
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| 0h | 5uS |
| 7.2uS |
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| 1h | 10uS |
| 12.2uS |
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| 2h | 15uS |
| 17.2uS |
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| 3h | 25uS |
| 27.2uS |
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| 4h | 50uS |
| 52.2uS |
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| 5h | 100uS |
| 102.2uS |
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| 6h | 150uS |
| 152.2uS |
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| 7h | 200uS |
| 202.2uS |
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| 8h | 250uS |
| 252.2uS |
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SMSC LAN9311/LAN9311i | 191 | Revision 1.4 |
| DATASHEET |
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