參數(shù)資料
型號(hào): 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(yè)數(shù): 36/78頁(yè)
文件大?。?/td> 1689K
代理商: ORLI10G3BM680-DB
Lattice Semiconductor
ORCA ORLI10G Data Sheet
41
ORLI10G Interface Timing Diagrams
This section describes the timing at the FPGA – Core boundary. There are 4 distinct timing modes available for use
with the ORLI10G device (note that for TX, 10G mode can be used for either 10G or 2.5G operation):
10G RX and TX with PLL used across the interface.
10G RX and TX with NO PLL used across the interface.
Quad 2.5G RX with NO PLL used across the interface plus 10G TX with PLL used across the interface.
Quad 2.5G RX with NO PLL used across the interface plus 10G TX with NO PLL used across the interface.
Figure 27 shows a simplied, single channel view of the transmit path in divide-by-four mode. The divide-by-8
mode timing is similar, where the slow speed clocks are 1/8th the fast clock speed. PLL_TX2 is used to align clocks
across the Embedded Line Interface – FPGA boundary. The PLL_TX1 macro is not used as it is unneeded. The
PLLs in the embedded line interface can be bypassed via the PLL_BYPASS external FPSC pin. The feedback loop
shown is connected up automatically by the design kit software.
Figure 27. Single Channel Tx Divide-by-4 Diagram (-1 Speed Grade)
161 MHz
Unused
PLL_TX2
PLL_TX1
TX2_VCOP
TX2_FBCKI
644MHz
TX_DAT_IN[15:0]
3ns
data
Core Clock
Trees
TX_DAT_OUT
[3:0][P/N]
TX_CLK_OUT
[0][P/N]
Primary
FPGA Clock
Tree
High Speed
Multiplexer Block
Clock
Divider
/4
D
Q
TX_CLK_IN[P/N]
Embedded Line Interface Core
FPGA
Q
Low Speed
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