Altera Stratix GX Transceiver Manual de usuario Pagina 109

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Altera Corporation 4–27
January 2005 Stratix GX Transceiver User Guide
SONET Mode
Figure 4–20. MegaWizard Plug-In Manager - ALTGXB (Page 6 of 9) - Receiver (2) Notes (1)(3)
Notes to Figure 4–20:
(1) Flips the bit ordering at the receiver output to the FPGA. The bit flip operates on a by-byte mode only. The low byte
and high byte are flipped separately. The low byte is still transmitted first. This feature is used in conjunction with
transmitter and word aligner bit flip in SONET mode.
(2) For more information, refer to the Stratix GX Analog Description chapter.
(3) SONET data rate is set at 2488.32 Mbps by default. Other data rates are possible, but they must adhere to the set
multiplication factor of 2, 4, 5, 8, 10, 16, 20 of the input clock. Multiplication factors of 2, 4, 5 must use the refclkb
pins. A multiplication factor of 2 also requires that the receiver PLL be trained by the transmitter PLL.
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