1N4007 Datasheet, PDF (144/236 Pages) Naina Semiconductor ltd. – General Purpose Rectifier 1.0A

TMS320C6652, TMS320C6654
SPRS841D – MARCH 2012 – REVISED JUNE 2016
www.ti.com
6.14 Ethernet Media Access Controller (EMAC) (C6654 Only)
The Ethernet media access controller (EMAC) module provides an efficient interface between the C6654
and C6652 DSP core processor and the networked community. The EMAC supports 10Base-T (10 Mbps),
and 100BaseTX (100 Mbps), in half- or full-duplex mode, and 1000BaseT (1000 Mbps) in full-duplex
mode, with hardware flow control and quality-of-service (QOS) support.
The EMAC module conforms to the IEEE 802.3-2002 standard, describing the Carrier Sense Multiple
Access with Collision Detection (CSMA/CD) Access Method and Physical Layer specifications. The IEEE
802.3 standard has also been adopted by ISO/IEC and redesignated as ISO/IEC 8802-3:2000(E).
Deviating from this standard, the EMAC module does not use the transmit coding error signal MTXER.
Instead of driving the error pin when an underflow condition occurs on a transmitted frame, the EMAC will
intentionally generate an incorrect checksum by inverting the frame CRC, so that the transmitted frame
will be detected as an error by the network.
The EMAC control module is the main interface between the device core processor, the MDIO module,
and the EMAC module. The relationship between these three components is shown in Figure 6-24. The
EMAC control module contains the necessary components to allow the EMAC to make efficient use of
device memory, plus it controls device interrupts. The EMAC control module incorporates 8KB of internal
RAM to hold EMAC buffer descriptors.
Interrupt
Controller
Configuration Bus
DMA Memory
Transfer Controller
Peripheral Bus
EMAC/MDIO
Interrupt
EMAC Control Module
EMAC Module
MDIO Module
Ethernet Bus
MDIO Bus
Figure 6-24. EMAC, MDIO, and EMAC Control Modules
For more detailed information on the EMAC/MDIO, see Gigabit Ethernet (GbE) Subsystem for KeyStone
Devices User's Guide.
6.14.1 EMAC Device-Specific Information
The EMAC module on the device supports Serial Gigabit Media Independent Interface (SGMII). The
SGMII interface conforms to version 1.8 of the industry standard specification.
144 Detailed Description
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