W89C841F Datasheet, PDF (60/102 Pages) Winbond – 3-IN - 1 10/100M FAST ETHERNET CONTROLLER

W89C841F/D
C24/CTDAR Current Transmit Descriptor Address Register
The register shows the start address of the descriptor which W89C841F transmit DMA state machine
is used to process the current frame.
BIT ATTRIBUTE BIT NAME
DESCRIPTION
31:0
R
CTDA Current Transmit Descriptor Address
The CTDA represents the start address of the current
receive descriptor which W89C841F transmit DMA state
machine is used to process the transmit frame.
C28/CTBAR Current Transmit Buffer Address Register
The register shows the address of the system memory from which W89C841F transmit DMA state
machine will fetch the double word data and queue the data into the FIFO for transmission.
BIT ATTRIBUTE BIT NAME
DESCRIPTION
31:0
R
CTBA Current Receive Buffer Address
The CTBA contains the start address of the host memory
from which W89C841F transmit DMA state machine will
fetch the double word data and queue it into the FIFO for
transmission.
C2c/CRDAR Current Receive Descriptor Address Register
The register shows the start address of the receive descriptor which is used by W89C841F receive
DMA state machine to process the current receive frame.
BIT ATTRIBUTE BIT NAME
DESCRIPTION
31:0
R
CRDA Current Receive Descriptor Address
The CRDA represents the start address of the current
receive descriptor which W89C841F receive DMA state
machine is used to process the received frame.
C30/CRBAR Current Receive Buffer Address Register
The register shows the start address of the host memory which is used by W89C841F receive DMA
state machine to store the current aligned double word data of the current received frame.
BIT ATTRIBUTE BIT NAME
DESCRIPTION
31:0
R
CRBA Current Receive Buffer Address
The CRBA contains the pointer current address in the on-
using buffer of the host memory which will be used by
W89C841F receive DMA state machine to store the current
aligned double word data of the current received frame.
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