NO:
W90P710 Programming Guide
VERSION:
2.1
PAGE:
53
The above information is the exclusive intellectual property of Winbond Electronics and shall not be disclosed,
distributed or reproduced without permission from Winbond.
Table No.: 1200-0003-07-A
Figure 4-4 Packet Transmission Flow
Get a Tx Buffer Descriptor from Tx Software Buffer
Descriptor Pointer
Check
ownership
bits,
CPU
?
Run out of Descriptors,
Exception Handling
Allocate data buffer for storing transmitting packets, set
the start address of data buffer to
Data Buffer Starting
Address
field of buffer descriptor
Copy Transmitting packet data to allocated buffer
Set
I, C, P
bits if needed
Set length of the packet to
Frame Length
field of
descriptor
Set
ownership
bits to
DMA
Set
TXON
bit of
MCMDR
register if it didn't be set
Write
TSDR
register
Ready to Transmit Packet
MAC Processing
N
Y
