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LAXP2-8E-5QN208E 数据表(PDF) 6 Page - Lattice Semiconductor |
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LAXP2-8E-5QN208E 数据表(HTML) 6 Page - Lattice Semiconductor |
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6 / 83 page  2-3 Architecture Lattice Semiconductor LA-LatticeXP2 Family Data Sheet Figure 2-2. PFU Diagram Slice Slice 0 through Slice 2 contain two 4-input combinatorial Look-Up Tables (LUT4), which feed two registers. Slice 3 contains two LUT4s and no registers. For PFUs, Slice 0 and Slice 2 can also be configured as distributed memory, a capability not available in PFF blocks. Table 2-1 shows the capability of the slices in both PFF and PFU blocks along with the operation modes they enable. In addition, each PFU contains logic that allows the LUTs to be com- bined to perform functions such as LUT5, LUT6, LUT7 and LUT8. There is control logic to perform set/reset func- tions (programmable as synchronous/asynchronous), clock select, chip-select and wider RAM/ROM functions. Figure 2-3 shows an overview of the internal logic of the slice. The registers in the slice can be configured as posi- tive/negative edge triggered or level sensitive clocks. Table 2-1. Resources and Modes Available per Slice Slice 0 through Slice 2 have 14 input signals: 13 signals from routing and one from the carry-chain (from the adja- cent slice or PFU). There are seven outputs: six to routing and one to carry-chain (to the adjacent PFU). Slice 3 has 13 input signals from routing and four signals to routing. Table 2-2 lists the signals associated with Slice 0 to Slice 2. Slice PFU BLock PFF Block Resources Modes Resources Modes Slice 0 2 LUT4s and 2 Registers Logic, Ripple, RAM, ROM 2 LUT4s and 2 Registers Logic, Ripple, ROM Slice 1 2 LUT4s and 2 Registers Logic, Ripple, ROM 2 LUT4s and 2 Registers Logic, Ripple, ROM Slice 2 2 LUT4s and 2 Registers Logic, Ripple, RAM, ROM 2 LUT4s and 2 Registers Logic, Ripple, ROM Slice 3 2 LUT4s Logic, ROM 2 LUT4s Logic, ROM Slice 0 LUT4 & CARRY LUT4 & CARRY D D Slice 1 LUT4 & CARRY LUT4 & CARRY Slice 2 LUT4 & CARRY LUT4 & CARRY From Routing To Routing Slice 3 LUT4 LUT4 D D D D FF FF FF FF FF FF |
类似零件编号 - LAXP2-8E-5QN208E |
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类似说明 - LAXP2-8E-5QN208E |
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