SH7616 Datasheet, PDF (402/935 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series

Section 9 Ethernet Controller (EtherC)
9.1.2 Configuration
Figure 9.1 shows the configuration of the Ethernet controller.
Transmit
controller
MII
Receive
controller
Command status
interface
Figure 9.1 Configuration of Ethernet Controller (EtherC)
Transmit Controller: Transmit data is stored in the transmit FIFO from memory via the transmit
E-DMAC. The transmit controller assembles this data into an Ethernet/IEEE802.3 frame, which it
outputs to the MII. After passing through the MII, the transmit data is sent onto the line by a PHY-
LSI. The main functions of the transmit controller are as follows:
• Frame assembly and transmission
• CRC calculation and provision to frames
• Data retransmission in case of a collision (up to 15 times)
• Compliant with MII in IEEE802.3u standard
• Byte-nibble conversion supporting PHY-LSI speed
Rev. 2.00 Mar 09, 2006 page 376 of 906
REJ09B0292-0200