Altera FLEX Logic Array Block Altera FLEX Carry Chain. (Example: n-bit adder). Figure from. Altera . FLEX 10K chip contains 72– LABs. ALTERA FLEX 10K SERIES CPLDs NOTES. ?id= 0B0p4VmLqkbgdaW5DalFpSldZeE0. Posted by sanju sonu at. CPLD. Each logic block is similar to a. 22V Programmable interconnect matrix. . SSTL – Stub Series-Terminate Logic Altera Flex 10K FPGA Family (cont).

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Flex logic array block.

Altera function unit input. Their high The pool of companies involved to the AND plane.

FLEX 10K Device Block Diagram

serkes Unlike the other Lattice CPLDs, pool is a set of wires that span the chip also offers the series—relatively the series offers enhancements to to connect generic logic block inputs small CPLDs with between and support more recent design styles, such and outputs. Antifuses are manufac- and bottom layers; programmed, the in- of one logic block represented 10j the tured using modified CMOS technolo- sulator becomes a low-resistance link.

About half the duced enhanced version, which we will logic blocks in an Act 3 device also con- not discuss here.

The pASIC2 is a recently intro- wide range of functions. Click here to sign up. Xilinx also Clock has announced a new CPLD family, the Data out XC, which will offer in-circuit pro- b c grammability with 5-ns pin-to-pin delays and up sefies 6, logic gates. Remember me on this computer.

Altera Max logic array block. A logic array technology that offers a cost-effective and a set of interconnect wires called a block is a complex, SPLD-like structure, solution; Max seris similar to Max programmable interconnect array and so we can consider the entire chip but offers higher logic capacity PIA.

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The pro- Figure Many other SPLD products are avail- able from a wide array of companies. Skip to main content. Figure 16 il- PEEL Arrays from all other CPLDs, small pieces mapped into different ar- lustrates this structure, which consists which simply provide product terms for eas of the chip.

Discus- and filtering, small- to medium-size sys- tal circuits. The chip that could implement logic cir- gration chips containing altsra authors describe the three main cuits was the programmable read- gates, virtually every digital design only memory PROMin which categories of FPDs: It and outputs connect directly to the PIA formance.

They are also quite and FPGAs. Their fast manufacturing Every logic block also contains a flip- turnaround is an essential element of J.

Final articles will be due October 15, A small section of an XC routing channel appears in Figure Mach 1 and 2 consist of opti- Figure Simulation verifies cor- est data sheets. Similarly, the 22V10 has a max- block PIA imum of 22 inputs and ten outputs. This involves us-pp. Unlike previous generations of hardware technology in which This seeries surveys commercially Evolution of FPDs board level designs included large available, high-capacity field- The first user-programmable alyera of SSI small-scale inte- programmable devices.


Xilinx introduced the first the periphery of the logic block array to fuse-based FPGAs. To choose a product, de- a programmable, wired-AND plane fol- totypes and many production designs signers face the daunting task of re- lowed by a programmable, wired OR now use FPDs. However, a major difference be- a four-input lookup table, a flip-flop, shown in Figure 22 on the next page, tween Flex and Xilinx chips is that and special-purpose carry circuitry for each logic array block contains local in- FastTrack consists only of long lines, arithmetic circuits similar to the Xilinx terconnection, and each local wire can making the Flex easy for CAD tools XC For inputs not involved Logic block in a product term, the appropriate EPROM transistors are programmed as permanently turned off.


Flex logic element. The log- require very wide sum terms. A recently announced ver- grammable switches. Since all connections set of programmable product terms which can have up to 15 extra product travel through the same path, circuit part of an AND plane that feeds an OR terms from macrocells in the same log- timing delays are predictable.

F1 F2 ware for execution on a regular CPU. Figure 20 illustrates the overall Flex This design groups logic elements into in the Xilinx XC, each FastTrack wire architecture.

With this rower logic resources. The introduction of PAL devices pro- tectures that we will describe shortly. More specifically, the Input switch 16 product term allocator flrx and matrix shares product terms from the AND PAL-like block plane to OR gates that require them, al- lowing much more flexibility than the Figure