Renesas Electronics America Inc. RX Ethernet Peripheral © 2011 Renesas Electronics America Inc. All rights reserved. 00000-A Rev. 1.00 8/16/2011.

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Presentation transcript:

Renesas Electronics America Inc. RX Ethernet Peripheral © 2011 Renesas Electronics America Inc. All rights reserved A Rev /16/2011

Agenda Contained in this Course: RX Ethernet Peripheral Highlights RX Ethernet Controller (EtherC) RX Ethernet Direct Memory Access Controller (E-DMAC) EtherC and E-DMAC Working Together © 2011 Renesas Electronics America Inc. All rights reserved. 2 This course contains an overview of the RX MCU Ethernet peripheral

RX Ethernet Peripheral Highlights Ethernet Controller (EtherC) Ethernet Direct Memory Access Controller (E-DMAC) Physical Device Interface (MII or RMII) © 2011 Renesas Electronics America Inc. All rights reserved. 3

Ethernet Controller (EtherC) Ethernet and IEEE Frames Type encapsulation Length encapsulation 10 and 100 Mbps Operation Half and full Duplex Modes PAUSE MAC Layer Flow Control (IEEE 802.3x) When in full duplex mode Wake-On-LAN (WOL) Magic Packet Detection Automatic Frame Checksum MII and RMII PHY Layer Interface © 2011 Renesas Electronics America Inc. All rights reserved. 4

Ethernet Direct Memory Access Controller (E-DMAC) Dedicated DMA Engine Between EtherC and system memory Receive and transmit descriptors CPU load reduction Single Frame and Multi-buffer Operation One buffer per frame Multiple buffers for longer frames Fully automated Frame Status Information Transmit and receive status in descriptors More status information in control registers © 2011 Renesas Electronics America Inc. All rights reserved. 5 HW Descriptor

E-DMAC Software Software Descriptors Circular Buffers to Form Links On-chip or External Buffers Automated Operation © 2011 Renesas Electronics America Inc. All rights reserved. 6

EtherC and E-DMAC Working Together © 2011 Renesas Electronics America Inc. All rights reserved 7

© 2011 Renesas Electronics America Inc. All rights reserved. 8 Summary RX Ethernet Peripheral Highlights RX Ethernet Controller (EtherC) RX Ethernet Direct Memory Access Controller (E-DMAC) Software Implementation of E-DMAC EtherC and E-DMAC Working Together Thanks for Viewing!

Renesas Electronics America Inc. © 2011 Renesas Electronics America Inc. All rights reserved. Thank You