User guide

Chapter 18: Analog Parameters Set Using QSF Assignments 18–7
Analog Settings for Arria V GZ Devices
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Analog Parameters with Computed Default Value
XCVR_RX_COMMON_MODE_
VOLTAGE
Receiver Buffer Common
Mode Voltage
Receiver buffer common-mode
voltage.
VTT_0P80V
VTT_0P75V
VTT_0P70V
VTT_0P65V
VTT_0P60V
VTT_0P55V
VTT_0P50V
VTT_0P35V
VTT_PUP
_WEAK
VTT_PDN
WEAK
TRISTATE1
VTT_PDN_
STRONG
VTT_PUP_
STRONG
TRISTATE2
TRISTATE3
TRISTATE4
Pin -
RX serial
data
XCVR_RX_ENABLE_LINEAR_
EQUALIZER_PCIEMODE
Receiver Linear Equalizer
Control (PCI Express)
If enabled equalizer gain control is
driven by the PCS block for PCI
Express. If disabled equalizer gain
control is determined by the
XCVR_RX_LINEAR_EQUALIZER_SETT
ING
assignment.
TRUE
FALSE
Pin -
RX serial
data
XCVR_RX_EQ_BW_SEL
Receiver Equalizer Gain
Bandwidth Select
Sets the gain peaking frequency for the
equalizer. For data-rates of less than
6.5Gbps set to HALF. For higher data-
rates set to FULL.
FULL
HALF
Pin -
RX serial
data
XCVR_RX_SD_ENABLE
Receiver Signal Detection
Unit Enable/Disable
Enables or disables the receiver signal
detection unit. For the PCIe PIPE PHY.
Changing from the default value for
any other protocol results in a
Quartus II compilation error.
TRUE
FALSE
Pin -
RX serial
data
XCVR_RX_SD_OFF
Receiver Cycle Count
Before Signal Detect Block
Declares Loss Of Signal
Number of parallel cycles to wait
before the signal detect block declares
loss of signal. For the PCIe PIPE PHY.
Changing from the default value for
any other protocol results in a
Quartus II compilation error.
0–29
Pin -
RX serial
data
XCVR_RX_SD_ON
Receiver Cycle Count Before
Signal Detect Block Declares
Presence Of Signal
Number of parallel cycles to wait
before the signal detect block declares
presence of signal. For the PCIe PIPE
PHY. Changing from the default value
for any other protocol results in a
Quartus II compilation error.
0–16
Pin -
RX serial
data
Table 18–4. Transceiver and PLL Assignments for Arria V GZ Devices (Part 2 of 4)
QSF Assignment Name
Pin Planner and
Assignment Editor
Name
Description Options Assign To