r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 849

Manufacturer Part Number

r5s77631ay266bgv

Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series

Manufacturer

Renesas Electronics Corporation.

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.

• MAC (Media Access Control) function

• Switching unit for data transfer between channels (relay FIFO: 6 Kbytes)

• E-DMAC (Direct Memory Access Controller for Ethernet controller) 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

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

Section 23 Gigabit Ethernet Controller (GETHER)

Section 23 Gigabit Ethernet Controller (GETHER)

Rev. 1.00 Oct. 01, 2007 Page 783 of 1956

REJ09B0256-0100