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1. GTS Transceiver Overview
2. GTS Transceiver Architecture
3. Implementing the GTS PMA/FEC Direct PHY Intel FPGA IP
4. Implementing the GTS System PLL Clocks Intel FPGA IP
5. Implementing the GTS Reset Sequencer Intel FPGA IP
6. GTS PMA/FEC Direct PHY Intel FPGA IP Example Design
7. Design Assistance Tools
8. Debugging GTS Transceiver Links with Transceiver Toolkit
9. Document Revision History for the GTS Transceiver PHY User Guide
3.1. IP Overview
3.2. Designing with the GTS PMA/FEC Direct PHY Intel FPGA IP
3.3. Configuring the GTS PMA/FEC Direct PHY Intel FPGA IP
3.4. Signal and Port Reference
3.5. Bit Mapping for PMA and FEC Mode PHY TX and RX Datapath
3.6. Clocking
3.7. Custom Cadence Generation Ports and Logic
3.8. Asserting reset
3.9. Bonding Implementation
3.10. Configuration Register
3.11. Configuring the GTS PMA/FEC Direct PHY Intel FPGA IP for Hardware Testing
3.12. Configurable Quartus® Prime Software Settings
3.13. Hardware Configuration Using the Avalon® Memory-Mapped Interface
3.4.1. TX and RX Parallel and Serial Interface Signals
3.4.2. TX and RX Reference Clock and Clock Output Interface Signals
3.4.3. Reset Signals
3.4.4. FEC Signals
3.4.5. Custom Cadence Control and Status Signals
3.4.6. RX PMA Status Signals
3.4.7. TX and RX PMA and Core Interface FIFO Signals
3.4.8. Avalon Memory Mapped Interface Signals
3.8.1. Reset Signal Requirements
3.8.2. Power On Reset Requirements
3.8.3. Reset Signals—Block Level
3.8.4. Run-time Reset Sequence—TX
3.8.5. Run-time Reset Sequence—RX
3.8.6. Run-time Reset Sequence—TX + RX
3.8.7. Run-time Reset Sequence—TX with FEC
3.8.8. RX Data Loss/CDR Lock Loss (Auto-Recovery)
3.8.9. TX PLL Lock Loss
6.1. Instantiating the GTS PMA/FEC Direct PHY Intel FPGA IP
6.2. Generating the GTS PMA/FEC Direct PHY Intel FPGA IP Example Design
6.3. GTS PMA/FEC Direct PHY Intel FPGA IP Example Design Functional Description
6.4. Simulating the GTS PMA/FEC Direct PHY Intel FPGA IP Example Design Testbench
6.5. Compiling the GTS PMA/FEC Direct PHY Intel FPGA IP Example Design
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3.3.4. RX Datapath Options
Figure 42. RX Datapath Options in Parameter Editor
Parameter | Values | Description |
---|---|---|
Enable rx_cdr_divclk |
On/Off | Enables the port representing RX CDR clock output from RX PMA to the local reference clock pin (set as output) or the CDR clock output pin. The physical port is typically used for CPRI. Default value is Off. |
Adaptation mode |
auto manual |
In manual adaptation mode you must provide the RX analog front end settings such as VGA, High Frequency Boost and DFE Tap 1 setting through QSF assignments. In auto adaptation mode, the PMA adjusts the RX analog front end settings continuously based on other PMA settings, such as data rate. You can change the Adaptation mode to manual if you are running at a lower data rate. However, if you are running at a low data rate but the link is lossy, you may need to use the auto adaptation mode. Default value is auto.
Note: Additional guidelines on using the Adaptation mode are planned to be available in a future Quartus® Prime Pro Edition software release.
|
RX CDR Settings | ||
Output frequency | Output | Specifies the non editable RX CDR output frequency initial value derived from the IP configuration. |
VCO frequency | Output | Specifies the non editable RX CDR VCO frequency initial value derived from the IP configuration. |
RX CDR reference clock frequency | 25 to 380 MHz | Selects the reference clock frequency (MHz) for CDR. Default value is 156.25 MHz. |
CDR lock mode | auto manual |
When auto is selected, during user initiated reset or power-up, CDR first tries to lock to reference and then locks to data if present. By default, loss of lock to data re-triggers reset RX PMA reset. When manual is selected, you must drive i_rx_set_locktoref to control the CDR lock behavior. If i_rx_set_locktoref is low CDR operates in auto mode, and in lock to reference mode if it is high. When Enable rx_cdr_divclk is enabled, only auto mode is available. Default value is auto. |
Enable rx_set_locktoref port | On/Off | This parameter is valid only when CDR lock mode is set to manual lock to reference. Asserting this signal keeps CDR in lock to reference mode. Deasserting this signal keeps CDR in auto mode. When switching modes, assert reset. Default value is Off |