Specifications

RX62N Group Ethernet Transmit and Receive Settings
Start
FIFO read function
_eth_fifoRead
End
Yes
No
End
No
Yes
No
Yes
No
Yes
No
Yes
Descriptor active?
Frame error?
Frame complete?
Set buffer size to read size
Read data from buffer
Entire read size was read?
Return read size
Set descriptor buffer data size
to read size
Read size exceeds buffer size?
Subtract buffer size
from read size
Return –2 Return –1
Figure 4.28 Sample Program Descriptor Processing Sequence (3)
R01AN0629EJ0101 Rev.1.01 Page 47 of 52
Mar 31, 2011