Altera Cyclone IV - PMA Controls Reconfiguration Mode

Chapter 3: Cyclone IV Dynamic Reconfiguration 3–13
Dynamic Reconfiguration Modes
November 2011 Altera Corporation Cyclone IV Device Handbook,
Volume 2
The following modes are available for dynamically reconfiguring the Cyclone IV
transceivers:
■ “PMA Controls Reconfiguration Mode” on page 3–13
■ “Transceiver Channel Reconfiguration Mode” on page 3–21
■ Channel interface (.mif based)
■ Data rate division in receiver channel (.mif based)
The following sections describe each of these modes in detail.
The following modes are unsupported for dynamic reconfiguration:
■ Dynamically enable/disable PRBS or BIST
■ Switch between a receiver-only channel and a transmitter-only channel
■ Switch between a ×1 mode to a bonded ×4 mode
PMA Controls Reconfiguration Mode
You can dynamically reconfigure the following PMA controls for all supported
transceiver configurations channels as configured in the ALTGX instances:
■ Pre-emphasis settings
■ Equalization settings (channel reconfiguration mode does not support
equalization settings)
■ DC gain settings
■ V
OD
settings
You can use the analog reconfiguration feature to dynamically reconfigure the
transceivers channels setting in either the transmitter or the receivers in the PMA
blocks. You can update the PMA controls on-the-fly based on the desired input. You
can perform both read and write transaction separately for this analog reconfiguration
mode.
Channel Reconfiguration
Channel Interface vvvvv— v
Data Rate Division in
Receiver Channel
— vvvv— v
PLL Reconfiguration vvvv— vv
Table 3–3. Cyclone IV GX Supported Dynamic Reconfiguration Mode (Part 2 of 2)
Dynamic Reconfiguration
Supported Mode
Operational Mode Quartus II Instances
.mif
Requirements
Transmitter
Only
Receiver
Only
Transmitter
and
Receiver
Only
ALTGX
ALTGX_
RECONFIG
ALTPLL_
RECONFIG