Altera LVDS SERDES Transmitter / Receiver User Manual
Page 43
Port Name
Direction
Width (Bit)
Description
rx_data_align_reset
Input
1
Resets the byte alignment circuitry. Use the
rx_data_align_reset
input port when you
need to reset the PLL during device operation
and when you need to re-establish the word
alignment. This port is available when
implement_in_les
parameter is set to ON.
rx_data_reset
Input
n
Asynchronous reset for all channels,
excluding the PLL.
rx_deskew
Input
1
Specifies whether to activate calibration
mode.
rx_dpa_lock_reset
Input
n
Forces the
rx_dpa_locked
port to low and
forces the lock counter to start counting
again.
rx_dpll_enable
Input
n
Enables the data path that flows through the
DPA circuit. This port is available only when
DPA mode is enabled. This port is supported
in Arria GX, HardCopy II, Stratix II, and
Stratix II GX devices only.
rx_dpll_hold
Input
n
Prevents the DPA circuitry from switching to
a new phase. When low, the DPA tracks any
dynamic phase variations between the clock
and data. When high, the DPA holds the last
locked phase and does not track any dynamic
phase variations between the clock and data.
This port is not available in non-DPA mode.
rx_dpll_reset
Input
n
Asynchronous reset for all channels.
rx_enable
Input
1
Enables external PLL usage. When the
rx_
enable
port is specified, it must connect to
the enable0 or enable1 port of a PLL IP core
instance configured in LVDS mode. However,
the
enable0
,
enable1
ports and the Set up
PLL in LVDS mode option are available for
Stratix II devices only.
rx_fifo_reset
Input
n
Asynchronous reset to the FIFO between the
DPA and the data realignment circuits. The
synchronizer block must be reset after a DPA
loses lock condition and the data checker
shows corrupted received data. The minimum
pulse width requirement for this reset is one
parallel clock cycle. This signal resets the
FIFO block. Only available when DPA mode
is enabled.
UG-MF9504
2014.12.15
ALTLVDS_RX Ports
43
LVDS SERDES Transmitter/Receiver IP Cores User Guide
Altera Corporation