
16–26 Chapter 16: Transceiver Reconfiguration Controller IP Core
Channel and PLL Reconfiguration
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
Table 16–21 lists the PLL reconfiguration registers.
1 All undefined register bits are reserved and must be set to 0.
.
Channel and PLL Reconfiguration
You can use channel and PLL reconfiguration to dynamically reconfigure the channel
and PLL settings in a transceiver PHY IP core. Among the settings that you can
change dynamically are the data rate and interface width. Refer to Device Support for
Dynamic Reconfiguration for specific information about reconfiguration in Arria V,
Cyclone V, and Stratix V devices.
The Transceiver Reconfiguration Controller’s Streamer Module implements channel
and PLL reconfiguration. Refer to the Streamer Module Registers for more
information about this module.
1 Channel and PLL reconfiguration are available for the Custom, Low Latency,
Deterministic Latency PHY IP Cores, the Arria V Native PHY, the Arria V GZ Native
PHY, the Cyclone V Native PHY, and the Stratix V Native PHY.
Table 16–21. PLL Reconfiguration Offsets and Values
Offset Bits R/W Name Description
0x0 [2:0] RW
logical refclk selection
When written initiates reference clock change
to the logical reference clock indexed by bits
[2:0].
This index refers to the Number of input
clocks on the Reconfiguration tab. You can
specify up to 5 input clocks.
0x1 [2:0] RW
logical PLL selection
When written initiates a clock generation block
(CGB) switch to logical PLL indexed by bits
[2:0].
This index refers to the Number of TX PLLs
selected on the Reconfiguration tab. You can
specify up to 4 input clocks. If you set the
Main TX PLL logical index to 0, the Quartus II
software initializes your design using the first
PLL defined.
0x2 [24:0] RO
refclk physical mapping
Specifies the logical to physical refclk for
current logical channel.
0x3 [14:0] RO
PLL physical mapping
Specifies the logical to physical clock
generation block word for current logical
channel.
0x4 [0:0] RW
TX PLL select
Indicates the following TX PLL types.
■ 0: CMU PLL (default)
■ 1: ATX PLL
For the ATX PLL, write a 1 to this bit before
initiating reference clock switch. For the CMU
PLL, you do not need to write this register
before initiating a reference clock switch
because it is the default.
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