Altera UG-01080 Guía de usuario Pagina 178

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9–4 Chapter 9: Custom PHY IP Core
General Options Parameters
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
Bonding mode
×1
×N
fb_compensation
Select ×1 to use separate clock sources for each channel. (This
option is available for Cyclone V and Arria V devices.)
Select ×N to use the same clock source for up to 6 channels in a
single transceiver bank, resulting in reduced clock skew. You must
use contiguous channels when you select ×N bonding. In addition,
you must place logical channel 0 in either physical channel 1 or 4.
Physical channels 1 and 4 are indirect drivers of the ×N clock
network.
Select fb_compensation (feedback compensation) to use the same
clock source for multiple channels across different transceiver
banks to reduce clock skew. (This option is only available for
Stratix V devices.)
For more information about bonding, refer to “Transmitter Clock
Network” in Transceiver Clocking in Arria V Devices in volume 2 of
the Arria V Device Handbook.
For more information about bonding, refer to “Transmitter Clock
Network” in Transceiver Clocking in Cyclone V Devices in volume 2
of the Cyclone V Device Handbook.
For more information about bonding, refer to “Bonded Channel
Configurations Using the PLL Feedback Compensation Path” in
Transceiver Clocking in Stratix V Devices in volume 2 of the
Stratix V Device Handbook.
FPGA fabric transceiver
interface width
8,10,16,20,
32,40
Specifies the total serialization factor, from an input or output pin to
the MAC-layer logic.
PCS-PMA interface width 8, 10, 16, 20
The PCS-PMA interface width depends on the FPGA fabric
transceiver interface width and whether 8B/10B is enabled. The
following combinations are available:
FPGA/XCVR 8B/10B PCS-PMA Interface
Width
8No8
8Yes10
10 No 10
16 No 8 or 16
16 Yes 10 or 20
20 No 10 or 20
32 No 16
32 Yes 20
40 No 20
Table 9–2. Custom PHY General Options (Part 2 of 4)
Name Value Description
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