參數(shù)資料
型號: ORLI10G3BM680-DB
廠商: LATTICE SEMICONDUCTOR CORP
元件分類: FPGA
英文描述: FPGA, 1296 CLBS, 333000 GATES, PBGA680
封裝: PLASTIC, FBGA-680
文件頁數(shù): 42/78頁
文件大?。?/td> 1689K
代理商: ORLI10G3BM680-DB
Lattice Semiconductor
ORCA ORLI10G Data Sheet
47
Figure 33 shows the Receive (Embedded Line Interface to FPGA) timing for 2.5G mode where PLL_RX2 is
bypassed via the PLL_BYPASS external FPSC pin. The 0.9 ns minimum propagation delay and 2.7 ns maximum
propagation delay shown are approximate values for the embedded line interface in this scenario. In the waveform
shown, data will be time shifted at the FPGA capture register due to FPGA data path delay. Consult the ispLEVER
software, via the static timing analysis tool TRACE, for the exact timing values. The FPGA data path delay needs to
increase together with clock skew to avoid hold issues. The FPGA design should be checked for hold violations
with TRACE.
Figure 33. Receive Timing for 2.5G Mode with PLL Bypassed (-1 Speed Grade)
6.7ns
12.9ns
7.1ns
10.2ns
13.3ns
4.0ns
FPGA Clock
Short Skew
FPGA Clock
Long Skew
3.5ns
2.7 ns Tpd_max
0.9 ns Tpd_min
RX_CLK8_IN_MUX1
RX_DAT_IN
RX_CLK_IN_BUF
Clock
Divider
D
Embedded Line Interface Core
FPGA
Q
RX_CLK_IN[0]
(644 MHz)
0.0ns
3.1ns
6.2ns
9.3ns
12.4ns
RX_CLK_IN_BUF
(Reference Clock)
RX_CLK8_IN_MUX1
FPGA Clock
Short Skew
Data
1.4ns
Q
Secondary
Clock
0.5ns
D
Launch
Capture
4.5ns
10.7ns
0.5ns
3.6ns
9.8ns
1.4ns
7.6ns
13.8ns
Hold
FPGA Clock Long Skew
Capture
Hold
Potential hold violation.
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