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LAN9250 Datasheet(PDF) 396 Page - Microchip Technology |
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LAN9250 Datasheet(HTML) 396 Page - Microchip Technology |
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396 / 421 page  LAN9250 DS00001913A-page 396 2015 Microchip Technology Inc. Note 2: The default value of this field is determined by the configuration strap auto_mdix_strap_1. See Section 6.3, "Power Management," on page 44 for more information. 19:16 TX FIFO Size (TX_FIF_SZ) This field sets the size of the TX FIFOs in 1KB values to a maximum of 14KB. The TX Status FIFO consumes 512 bytes of the space allocated by TX_FIF_- SIZ, and the TX Data FIFO consumes the remaining space specified by TX_FIF_SZ. The minimum size of the TX FIFOs is 2KB (TX Data FIFO and Status FIFO combined). The TX Data FIFO is used for both TX data and TX commands. The RX Status and Data FIFOs consume the remaining space, which is equal to 16KB minus TX_FIF_SIZ. See section Section 11.10.3, "FIFO Mem- ory Allocation Configuration," on page 157 for more information. R/W 5h 15:14 RESERVED RO - 13:12 RESERVED - This field must be written with 00b for proper operation. R/W 00b 11:0 RESERVED RO - Bits Description Type Default |
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