Artesyn MVME2502, Installation And Use Manual, Page: 85 / 164

Functional Description
MVME2502 Installation and Use (6806800R96D)
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4.2.9 DMA Controller
The DMA controller transfers blocks of data between the various interfaces and functional
blocks of P2020 that are independent of the e500 cores. The P2020 DMA controller has three
high-speed DMA channels, all of which are capable of complex data movement and advanced
transaction chaining.
4.2.10 Enhanced Three-Speed Ethernet Controller (eTSEC)
The eTSEC controller of the device interface to10 Mbps, 100 Mbps, and 1 Gbps Ethernet/IEE
802.3 networks, and devices featuring generic 8 to 16-bit FIFO ports. The MVME2502 uses the
eTSEC using the RGMII interface.
4.2.11 General Purpose I/O (GPIO)
The P2020 has a total of sixteen I/O ports. Four of these ports are used alternately as external
input interrupt. All sixteen ports have open drain capabilities.
The table below details the GPIO usage for the MVME2502:
Table 4-1 P2020 GPIO Functions
GPIO bit CPU Pin # Function
15 E24 Not connected
14 F24 Not connected
13 E23 Connected to pin R7 of the CPLD (unused input)
12 F23 Connected to pin M8 of the CPLD (unused input)
11 D24 Connected to pin M7 of the CPLD (unused input)
10 A25 Not connected
09 A24 Not connected
08 F22 Not connected
07 R25 Not connected
06 R29 Connected to pin T6 of the CPLD (unused input)
05 R24 Connected to pin R6 of the CPLD (unused input)