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LAN9730 Datasheet(PDF) 155 Page - Microchip Technology |
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LAN9730 Datasheet(HTML) 155 Page - Microchip Technology |
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155 / 222 page  2012-2015 Microchip Technology Inc. DS00001946A-page 155 LAN9730/LAN9730i 6.3.25 TRANSMIT FIFO LEVEL DEBUG REGISTER (DBG_TX_FIFO_LVL) Address: 078h Size: 32 bits Bits Description Type Default 31:28 RESERVED RO - 27:16 TX FIFO Read Level (TXRDLVL) This is a DWORD count defined as follows: The count is increased by the number of DWORDs contained in the packet after the ENTIRE packet has been written into the FIFO. As a packet is read from the FIFO, it is decremented each time a DWORD is read. Note: Rewinds are not supported. RO 000h 15:12 RESERVED RO - 11:0 TX FIFO Write Level (TXWRLVL) This is a DWORD count defined as follows: As a packet is written into the FIFO, it is incremented each time a DWORD is written. Whenever a COMPLETE packet has been read from the FIFO, it is decreased by the number of DWORDs contained in the packet. On rewind, it is decreased by the number of DWORDs of the packet that has currently been transferred into the FIFO. Note: Write side rewinds are supported, i.e., if a USB packet is received with an error, the packet is rewound out and re-received from the host. RO 000h |
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