SH7763 Datasheet, PDF (849/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 23 Gigabit Ethernet Controller (GETHER)
Section 23 Gigabit Ethernet Controller (GETHER)
This LSI has an on-chip Gigabit Ethernet controller (GETHER) conforming to the Ethernet or the
IEEE802.3 MAC (Media Access Control) layer standard. Connecting a physical-layer LSI (PHY-
LSI) complying with this standard enables the GETHER to perform transmission and reception of
Ethernet/IEEE802.3 frames. The LSI has two MAC layer interface ports (hereafter referred to as
port 0 and port 1), both of which can be made to perform transmission and reception
independently.
The GETHER can transfer the transmitted or received Ethernet frame data to and from the
transmit/receive buffer in the memory at high speed using a dedicated direct memory access
controller (E-DMAC).
The GETHER also has an on-chip TSU (Transfer Switching Unit) which controls transferring,
allowing mutual transfer of data between MAC layer controllers of ports 0 and 1.
23.1 Features
• MAC (Media Access Control) function
Constructs/deconstructs data frames (frame format conforming to IEEE802.3, 2000 Edition)
Supports transfer at 10, 100, and 1000 Mbps
Supports full-duplex and half-duplex modes
Two channels (GETHER0 and GETHER1)
Flow control conforming to IEEE802.3x
Supports three PHY interfaces conforming to IEEE802.3
 GMII (Gigabit Media Independent Interface)
 MII (Media Independent Interface)
 RMII (Reduced Media Independent Interface)
Upward protocol support (checksum) function
• Switching unit for data transfer between channels (relay FIFO: 6 Kbytes)
• E-DMAC (Direct Memory Access Controller for Ethernet controller) function
Data transfer between GETHER and external/internal memory
Four channels
32-byte burst transfer
Supports single-frame/single-descriptor operation and single-frame/multi-descriptor (multi-
buffer) operation
Transfer data width: 32 bits
Rev. 1.00 Oct. 01, 2007 Page 783 of 1956
REJ09B0256-0100