HD6417616 RENESAS [Renesas Technology Corp], HD6417616 Datasheet - Page 443

• Manufacturer Part Number: HD6417616
• Description: 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

10.1
The SH7616 has an on-chip two-channel direct memory access controller (E-DMAC) directly
connected to the Ethernet controller (EtherC). A large proportion of buffer management is
controlled by the E-DMAC itself using descriptors. This lightens the load on the CPU and enables
efficient data transfer control to be achieved.
10.1.1
The E-DMAC has the following features:
Note: The E-DMAC cannot access peripheral modules.
The load on the CPU is reduced by means of a descriptor management system
Transmit/receive frame status information is indicated in descriptors
Achieves efficient system bus utilization through the use of block transfer (16-byte units)
Supports single-frame/multi-buffer operation
Section 10 Ethernet Controller Direct Memory Access
Overview
Features
Section 10 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Controller (E-DMAC)
Rev. 2.00 Mar 09, 2006 page 417 of 906
REJ09B0292-0200