Filter
Top Products
104
STP2002QFP
Sun Microelectronics
Fast Ethernet, Parallel Port, SCSI (FEPS) - STP2002QFP
• Writing to the lower aperture will load 32 bits of data and clear the tag
bit to 0 at the addressed location
• Writing to the higher aperture will load 32 bits of data and set the tag
bit to 1 at the addressed location
• Reading from the lower aperture will return 32 bits of data from the
addressed location
• Reading from the higher aperture will return the tag bit from the
addressed location on data line [0]
NOTE: The TxFIFO should never be accessed using PIOs during nor-
mal operation.
7.5.19 ERX Configuration Register
This 23-bit register determines the ERX-specific parameters that control the
operation of the receive DMA channel.
Table 122: ETX TxFIFO Address
Register Physical Address Access Size
TxFIFO lower aperture
TxFIFO higher aperture
0x8C0_3000 - 0x8C0_37FC
0x8C0_3800 - 0x8C0_3FFC
4 bytes
4 bytes
Table 123: ERX Configuration Register Address
Register Physical Address Access Size
ERX configuration register 0x8C0_4000 4 bytes