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16–12 Chapter 16: Transceiver Reconfiguration Controller IP Core
Transceiver Reconfiguration Controller Calibration Functions
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
Table 169 lists the address range for the Transceiver Reconfiguration Controller and
the reconfiguration and signal integrity modules. It provides links to the sections
describing the registers in each module.
Transceiver Reconfiguration Controller Calibration Functions
The Transceiver Reconfiguration Controller supports various calibration functions to
enhance the performance and operation of any connected transceiver PHY IP core.
Refer to Resource Utilization for Stratix V Devices for the resource utilization of these
calibration functions.
Offset Cancellation
The offset cancellation function adjusts the offsets within the RX PMA and the CDR
parameters for process variations to achieve optimal performance in Stratix V devices.
Offset cancellation runs only once upon power-up. The RX buffers are unavailable
while this function is running. This calibration feature is run automatically and
enabled by default. Arria V and Cyclone V devices do not require offset cancellation
for the RX buffer.
Duty Cycle Calibration
The TX clocks generated by the CMU and travel across the clock network may
introduce duty cycle distortion (DCD). DCD calibration function reduces this
distortion. DCD runs once during device power up. Altera recommends that you turn
on the DCD for transceiver applications that operate at 4.9152 Gbps or higher in
Arria V devices.
Auxiliary Transmit (ATX) PLL Calibration
ATX calibration tunes the parameters of the ATX PLL for optimal performance. This
function runs once after power up. You can rerun this function by writing into the
appropriate memory-mapped registers.
The RX buffer is unavailable while this function is running. You should run the ATX
calibration after reconfiguring the PLL. You may need to rerun ATX calibration if you
reset an ATX PLL and it does not lock after the specified lock time.
For more information about the Auxiliary Transmit (ATX) PLL Calibration refer to
ATX PLL Calibration Registers.
Table 16–9. Transceiver Reconfiguration Controller Address Map
Address Link
7’h08–7’h0C PMA Analog Control Registers
7’h10–7’h14 EyeQ Registers
7’h18–7’h1C DFE Registers
7’h28–7’h2C AEQ Registers
7’h30–7’h34 ATX PLL Calibration Registers
7’h38–7’h3C Streamer Module Registers
7’h40–7’h44 PLL Reconfiguration
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