Visible to Intel only — GUID: dbs1676546761581
Ixiasoft
Visible to Intel only — GUID: dbs1676546761581
Ixiasoft
3.3.1. Parameter Settings
Parameter | Values | Default Values | Description |
---|---|---|---|
Parameter | |||
Number of groups | 1 - 8 | 1 | Number of data and strobe groups in the interface. The value is set to 1 by default. |
I/O Instance ID | 0 - 7 | 0 | Use to assign different base addresses to two instances in the same bank. You must assign two PHY Lites in the same bank with different instance IDs using the IP GUI to avoid overlapping base addresses of the PLL and CPA.4 |
General Tab- these parameters are set on a per interface basis | |||
Clocks | |||
Interface clock frequency | 150 MHz - 1250 MHz | 533.0 MHz | External interface clock frequency. |
Use recommended PLL reference clock frequency | On, Off | On | Turn on to calculate the PLL reference clock frequency automatically for the best performance. Turn off to specify your own PLL reference clock frequency. |
PLL reference clock frequency | Dependent on interface clock frequency | 266.5 MHz | PLL reference clock frequency. Feed a clock of this frequency to the PLL reference clock input of the memory interface. Select the desired PLL reference clock frequency. The values available depend on the interface clock frequency or the user clock rate logic. |
VCO clock frequency | Calculated internally by PLL | 1066.0 MHz | The PLL calculates the VCO clock frequency automatically based on the interface clock and the core clock rate. |
Core clock frequency | Calculated internally by PLL | 266.5 MHz | The PLL calculates the core clock frequency automatically based on clock rate of user logic. |
Dynamic Reconfiguration | |||
Use dynamic reconfiguration | On, Off | Off | Enables an Avalon® memory-mapped interface that allows you to dynamically reconfigure the PHY Lite for Parallel Interfaces IP settings. |
I/O Settings | |||
I/O standard | SSTL-12 1.2-V POD 1.1-V POD 1.2-V HSTL 1.2-V HSUL 1.1-V LVSTL 1.05-V LVSTL |
SSTL-12 | Specifies the I/O standard of the interface's strobe and data pins written. |
Reference clock I/O configuration | Single-ended, True Differential with on-chip termination, True Differential without on-chip termination |
Single-ended | Specifies the reference clock I/O configuration. |
Group<x> - these parameters are set on a per group basis | |||
Group<x> Pin Settings | |||
Pin type | Input, Output, Bidirectional | Bidirectional | Direction of data pins. |
Pin width | 1 to 22 | 8 | Number of pins in this data/strobe group. The pin width includes the number of strobe pins. |
DDR/SDR | DDR, SDR | DDR | Double/single data rate. |
Data Configuration | Differential, Single-ended | Differential | Selects the type of data. |
Group<x> Input Path Settings | |||
Additional receiver enable latency | 0 to 15 | 0 | The number of external interface clock cycles to delay the internal receiver enable signal in addition to the inherent latency in the receiver enable path. The valid range depends on the user clock rate and memory interface frequency set in the General tab. |
Capture strobe phase shift | 0, 45, 90 | 90 | Internally phase-shift the input strobe relative to the input data. |
Group<x> Output Path Settings | |||
Additional write latency | 0 to 15 | 0 | The number of external interface clock cycles to delay the output data in addition to the inherent write latency. The valid range is the set of sub core clock cycles, which is dependent on the user clock rate set in the General tab. To delay by a larger amount, register the data in the core. |
Output strobe phase | 0, 45, 90, 135, 180 |
90 | Phase shift of the output strobe relative to the output data. |
Group<x> General Strobe Settings
Note: These parameters are disabled when Copy parameters from another group is enabled.
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Strobe configuration | Differential, Single-ended | Differential | Selects the type of strobe. For a list of supported I/O standards, refer to the related information.. |
Group<x> OCT Settings | |||
Use Default OCT Values | On, Off | On | Use default OCT values based on the I/O standard parameter setting. |
Input OCT Value | 40 ohm with calibration, 50 ohm with calibration, 50 ohm without calibration, 60 ohm with calibration |
60 ohm with calibration | Specifies the group's data and strobe input termination values. Disables the Use Default OCT Values parameter to select the desired input OCT value. |
Output OCT Value | 34 ohm with calibration, 34 ohm without calibration, 40 ohm with calibration, 40 ohm without calibration |
40 ohm with calibration | Specifies the group's data and strobe output termination values. Disable the Use Default OCT Values parameter to select the desired output OCT value. |
Pin Placement | |||
RZQ Index | 38, 62 | 38 | Specifies the RZQ pin index in the I/O bank. It should be reserved at pin 38 or pin 62. |
Pin Parameter Settings Enable manual location of data pins |
On, Off | Off | By default, all the data pins are placed in an ordered-dense format i.e., no gap pins. Enable this option if data pins are required to be spaced out i.e. with gap-pins. Adhere to all restrictions in the user guide. |
Pin Placement Settings | Comma separated values | — | Provides a CSV list of pin locations one per each data pin. For example, a value of 0, 1, 8, 9 places data[0], data[1], data[2], data[3] on pin0, pin1, pin8, pin9 of IO48 Tile respectively, leaving pin2-7 not used for data. These unused pins may be used for PLL Reference Clocks, RZQ Pin or Strobes (subject to the constraints mentioned in the User Guide). |