W3100A Datasheet, PDF (39/63 Pages) List of Unclassifed Manufacturers – i2Chip W3100A

TLEN STT
0
2
3
MAC RAW data
As shown in the above diagram, the header information IPL_RAW mode contains (1) TLEN identical to
UDP TLEN displaying the total length of data and header length, and (2) 1 Byte STT displaying the status of
the received data. The description of the received data is recorded at STT Byte as below.
76543210
Meaning
1 x x x x x x x Destination H/W Address of the received packet
is identical to SHAR (Source H/W Address
Register)
x x 1 x x x x x Reception of Broadcasting Packet
x x x 1 x x x x Reception of Packet with Error
MACL_RAW starting point
MACL_RAW
C0_RW_PR = A
C0_RR_PR = A
recv LEN
MACL_RAW
receivefrom
cal RDS(recv
data size)
RDS <=
C0_RW_PR -
C0_RR_PR
No
RDS >=
recv LEN
read data from
C0_RR_PR
Yes
read data
processing
C0_RR_PR <=
MACL_RAW data
C0_RR_PR + update C0_RR_PR
LEN
recv command
As in UDP, the reception module uses C0_RW_PR and C0_RR_PR to process the received data. The process
is identical to UDP received data process.
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