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The four lanes of the standard XAUI running at 3.125 Gbit/s are replaced by two lanes at 6.25 Gbit/s. Thus 16 pins of an integrated circuit (4 transmit + 4 receive differential pairs) can provide either one XAUI port or two RXAUI ports. The specification also defines a XAUI to RXAUI adapter and provides an implementation as Verilog RTL code. [2]
The first field in the MDIO header is the Preamble. During the preamble, the MAC sends 32 bits, all '1', on the MDIO line. ST. The Start field consists of 2 bits and always contains the combination '01'. OP. The Opcode consists of 2 bits. There are two possible opcodes, read '10' or write '01'. PA5. 5 bits, PHY address. RA5
Figure 1: Example two-port network with symbol definitions. Notice the port condition is satisfied: the same current flows into each port as leaves that port.. In electronics, a two-port network (a kind of four-terminal network or quadripole) is an electrical network (i.e. a circuit) or device with two pairs of terminals to connect to external circuits.
Programmable in C or assembly language using the free CodeWarrior development environment from Freescale, based on Eclipse and in C++ with CodeSourcery. Integrated open-source debugging cable for fast prototyping. The first Arduino Shield Compatible board with two Arduino slots to add more and more shields. BigBrother-USB [277] Freescale MCF51JM128
Programmable in C or assembly language using the free CodeWarrior development environment from Freescale, based on Eclipse and in C++ with CodeSourcery. Integrated open-source debugging cable for fast prototyping. The first Arduino Shield Compatible board with two Arduino slots to add more and more shields. Firebird32 [258] Coldfire
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Dual-ported RAM (DPRAM), also called dual-port RAM, is a type of random-access memory (RAM) that can be accessed via two different buses.. A simple dual-port RAM may allow only read access through one of the ports and write access through the other, in which case the same memory location cannot be accessed simultaneously through the ports since a write operation modifies the data and therefore ...
CodeWarrior is an integrated development environment (IDE) published by NXP Semiconductors for editing, compiling, and debugging software for several microcontrollers and microprocessors (Freescale ColdFire, ColdFire+, Kinetis, Qorivva, PX, Freescale RS08, Freescale S08, and S12Z) and digital signal controllers (DSC MC56F80X and MC5680XX) used in embedded systems.