Specifications

RX62N Group Ethernet Transmit and Receive Settings
4.2.3 45BOperating Environment of Sample Program
Figure 4.14 shows the operating environment of the sample program. For points to be borne in mind with regard to
the operating environment, see 4.6.1, Notes on Operating Environment.
Figure 4.14 Operating Environment of Sample Program
4.2.4 46BEthernet Frame Format
The transmit data that must be prepared consists of the portion of the Ethernet frame other than the preamble, start
frame delimiter (SFD), and CRC. The destination MAC address and transmit source MAC address in the header must
be changed to match the MAC addresses of the devices used. Note that the ETHERC does not check the transmit source
MAC address.
SFD CRC
Data stored in transmit buffer, 60 to 1,514 bytes
6621
46 to 1,500 47
Unit: byte
Preamble
Destination
MAC address
Transmit
source
MAC address
Type/
length
Data
Figure 4.15 Ethernet Frame Format (Transmission)
The data transferred to the receive buffer consists of the portion of the Ethernet frame other than the preamble, SFD,
and CRC.
SFD CRC
6621
46 to 1,500 47
Data transferred to receive buffer, 60 to 1,514 bytes
Unit: byte
Preamble
Destination
MAC address
Transmit
source
MAC address
Type/
length
Data
Figure 4.16 Ethernet Frame Format (Reception)
R01AN0629EJ0101 Rev.1.01 Page 31 of 52
Mar 31, 2011