Emerson MVME2500 manual Duart, DMA Controller, Enhanced Three-Speed Ethernet Controller eTSEC

Functional Description

4.2.8DUART

The chipset provides two universal asynchronous receiver/transmitter (UART), each of which acts independently of the other. Each UART is clocked by the CCB clock and is compatible with PC16522D. As a full-duplex interface, it provides a 16-byte FIFO for both transmitter and receiver mode.

4.2.9DMA Controller

The DMA controller transfers blocks of data between the various interfaces and functional blocks of P20x0 that are independent of the e500 cores. The P20x0 DMA controller has three high-speed DMA channels, all of which capable of complex data movement and advanced transaction chaining.

4.2.10 Enhanced Three-Speed Ethernet Controller (eTSEC)

The eTSEC controller of the device communicates to the 10 Mbps, 100 Mbps, and 1 Gbps Ethernet/IEE 802.3 networks, as well as to devices with generic 8 to 16-bit FIFO ports. The MVME2500 uses the eTSEC using the RGMII interface.

4.2.11 General Purpose I/O (GPIO)

The P20x0 has a total of sixteen I/O ports. Four of these ports are used alternately used as external input interrupt. All sixteen ports have open drain capabitilies.

The P20x0 processor provides a Serial Rapid I/O interface. However, this interface is not utilized by the MVME2500.

4.2.12 Security Engine (SEC) 3.1

The integrated security engine of the P20x0 is designed to off-load intensive security functions like key generation and exchange, authenticaion and bulk encryption from the processor core. It includes eight different execution units where data flows in and out of an EU.

64 MVME2500 Installation and Use (6806800L01H)