Altera Stratix GX Transceiver - Manual (Page 189)

Altera Corporation 6–35
January 2005 Stratix GX Transceiver User Guide
GigE Mode
Figure 6–30. MegaWizard Plug-In Manager - ALTGXB (Page 6 of 9) - Receiver (2) Notes (1) – (3)
Notes to Figure 6–30 :
(1) For more information, refer to the Stratix GX Analog Description chapter.
(2) The GigE data rate is set to 1250 Mbps by default. Possible multiplication factors of the input clock are 2, 4, 5, 8, 10,
16, and 20. Multiplication factors of 2, 4, and 5 must use the refclkb pins. A multiplication factor of 2 also requires
that the receiver PLL be trained by the transmitter PLL.
(3) The force signal detection option is always on; you cannot turn it off. Because the signal detect circuitry is always
forced, the rx_signaldetect signal is always set in GigE mode.