W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 70

• Manufacturer Part Number: W90N740CD
• Description: 32-Bit ARM7TDMI-Based Micro-Controller
• Manufacturer: WINBOND [Winbond]

Tx Buffer Descriptor (TXBD)
O: Ownership bit
0 = CPU 1 = DMA
W90N740 transmit DMA is allowed to access current descriptor if this bit is set to ‘1’ by the user driver
program. If the entire frame is transmitted successfully, then the ownership bit is cleared and the
ownership is granted to CPU.
I: MAC transmit interrupt enable after transmission complete of the frame
0 = Disable
1 = Enable
6.5.1.6. C: CRC mode bit
0 = Disable CRC mode
1 = Enable CRC mode
6.5.1.7. P: Padding mode bit
0 = Disable padding mode
1 = Enable padding mode
Data Buffer Starting Address
This field is the starting address of the frame data to be transmitted.
6.5.1.8. Tx Status: Transmit Status
This field is updated by the EMC after transmission.
6.5.1.9. Frame Length
This field is the size of the transmit frame.
Next Descriptor Starting Address
This field is the starting address of the next frame descriptor.
3
1
O
3
0
Tx Status
Next Descriptor Starting Address
Data Buffer Starting Address
1
6
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W90N740CD/W90N740CDG
1
5
Publication Release Date: September. 19, 2005
Frame Length
3
Revision A7
2
I
1
C P
0