HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 388

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

9.1.2
Figure 9.1 shows the configuration of the Ethernet controller.
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:
372
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
Configuration
Figure 9.1 Configuration of Ethernet Controller (EtherC)
Command status
interface
controller
Transmit
controller
Receive
MII