Cyclone V Device Handbook: Volume 2: Transceivers

ID 683586
Date 10/24/2018
Public
Document Table of Contents

3.1.1. Embedded Reset Controller Signals

The following figure shows the embedded reset controller and signals in the PHY IP instance. These signals reset your transceiver when you use the embedded reset controller.
Figure 56. Embedded Reset Controller


Table 40.  Embedded Reset Controller Reset Control and Status Signals
Signal Name Signal Description
phy_mgmt_clk Control Input Clock for the embedded reset controller.
phy_mgmt_clk_reset Control Input A high-to-low transition of this asynchronous reset signal initiates the automatic reset sequence control. Hold this signal high to keep the reset signals asserted.
tx_ready Status Output A continuous high on this signal indicates that the transmitter (TX) channel is out of reset and is ready for data transmission. This signal is synchronous to phy_mgmt_clk.
rx_ready Status Output A continuous high on this signal indicates that the receiver (RX) channel is out of reset and is ready for data reception. This signal is synchronous to phy_mgmt_clk.
reconfig_busy Status Output

An output from the Transceiver Reconfiguration Controller block indicates the status of the dynamic reconfiguration controller. At the first mgmt_clk_clk clock cycle after power-up, reconfig_busy remains low.

This signal is asserted from the second mgmt_clk_clk clock cycle to indicate that the calibration process is in progress . When the calibration process is completed, the reconfig_busy signal is deasserted.

This signal is also routed to the embedded reset controller by the Quartus® II software by embedding the signal in the reconfig_to_xcvr bus between the PHY IP and the Transceiver Reconfiguration Controller.

pll_locked Status Output This signal is asserted when the TX PLL achieves lock to the input reference clock. When this signal is asserted high, the embedded reset controller deasserts the tx_digitalreset signal.
rx_is_lockedtodata Status Output This signal is an optional output status port. When asserted, this signal indicates that the CDR is locked to the RX data and the CDR has changed from lock-to-reference (LTR) to lock-to-data (LTD) mode.
rx_is_lockedtoref Status Output

This is an optional output status port. When asserted, this signal indicates that the CDR is locked to the reference clock.

mgmt_clk_clk Clock Clock for the Transceiver Reconfiguration Controller. This clock must be stable before releasing mgmt_rst_reset.
mgmt_rst_reset Reset Reset for the Transceiver Reconfiguration Controller