User guide

Description
Specifies the slew rate of the output signal. The valid values span from the slowest rate to the fastest rate.
Table 8-15: Available Options
Value Valid Options
SLEW_R0 to SLEW_R7 SLEW_R0 to SLEW_R5
If QSF is not specified, the following table lists the default values.
Table 8-16: Default Values
PCIe
Value Default Slew Rate
PCIe Gen1 SLEW_R3
PCIe Gen2 SLEW_R4
PCIe Gen3 SLEW_R5
PCIe Gen4 SLEW_R5
Non-PCIe
Value
(VCCT/VCCR)
Default Slew Rate
Data rate < 1G
Data rate ≥ 1G to <
3G
Data rate ≥ 3G to <
6G
Data rate ≥ 6G
0.9 V SLEW_R2 SLEW_R4 SLEW_R5 SLEW_R5
1.0 V SLEW_R1 SLEW_R3 SLEW_R4 SLEW_R5
1.1 V SLEW_R0 SLEW_R2 SLEW_R3 SLEW_R5
Assign To
TX serial data.
Syntax
set_instance_assignment -name XCVR_A10_TX_SLEW_RATE_CTRL <value> -to <tx_serial_data
pin name>
Note:
Currently, the Quartus II software doesn't choose the default values for Non-PCIe mode. You must
specify the setting in the .qsf file.
8-14
XCVR_A10_TX_SLEW_RATE_CTRL
UG-01143
2015.05.11
Altera Corporation
Analog Parameter Settings
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