Programmable Logic Device Questions

• A CPLD is basically a simplified PLD.
• The programming technologies that are used in FPGA devices include SRAM, flash, and antifuse, with flash being most common.
• Antifuse devices are volatile.
• The Boolean sum of the four product terms is called the sum-of-products.
• The PAL structure is able to perform any sum-of-products (SOP) operation.
• SPLD is a program language used by PLD software.
• The PAL has an AND and OR structure similar to a PROM, but in the PAL the inputs to the AND gates are programmable, whereas the inputs to the OR gate are hard-wired.
• All I/O pins in the MAX7000S family have a tristate buffer.
• LUT is an acronym for look-up table.
• Sum-of-products is two or more product terms that are NANDed together.
• The major structures of the MAX7000S are the logic array block (LAB) and the programmable intermediate array (PIA).
• In the OLMC of a GAL16V8, the FMUX selects the signal that is fed into the input matrix.
• Most PAL devices have a tristate buffer driving the input pins.
• The FPLA has a programmable AND array and a programmable OR array.
• The GAL22V10 has 12 outputs pins and 10 input pins.
• The programming technologies that are used in CPLD devices are all nonvolatile.
• A PAL uses a programmable OR array followed by a fixed AND array.
• The hard core portions of FPGAs are reprogrammable in the field.
• The major digital system categories include Boolean logic, ASICs, and microprocessor/DSP devices.
• The Boolean expression (A + B)(C + D) is an example of ________.