Lattice Semiconductor ECP5 Technical Notes

77
ECP5 and ECP5-5G High-Speed I/O Interface
MIPI_FILTER
This module is needed to filter low speed signal for MIPI RX. It filters out narrow pulses. It will allow pulse width
above 40ns to pass.
Figure 72. MIPI_FILTER Ports
Table 44. MIPI_FILTER Port Description
Port In/Out Descriptions
FILTER_CLK
IN
Clock used to drive digital filter. Min freq=100 MHz. Recommendation is to use
internal oscillator at 133 MHz.
LS IN Low speed signal from MIPI PHY
RST IN Active high reset. When RST=1, LSOUT=0.
LS_OUT OUT Filtered output signal
cutoff Parameter Parameterize the circuit, default=4, pass signal above 4 cycles.
cutoff=round(20ns/period (filter_clk)).
Filter_clk=100 MHz, cutoff=4.
Filter_clk=133 MHz, cutoff=6.
Filter_clk=175 MHz, cutoff=7.
Filter_clk=200 MHz. cutoff=8.
MIPI_FILTER
LS
FILTER_CLK
RST
LSOUT

Lattice Semiconductor ECP5 Specifications

General

Brand	Lattice Semiconductor
Model	ECP5
Category	Recording Equipment
Language	English