what do you see in the image is the types of bricks. Similar so in the chip designing we do have lot of library cells to suite different implementation requirement.
some of the Types of library cells include:
- Boolen cells (Nand/Nor/Inverter, buffers,flip-flops,and, or…)
- Cells with different drive strengths for the same boolean cells like and_2, and_4 here _2 and _4 refers to the driving strength, this is one type of notation
- complex cells combining multiple functionalities like (And or/MUX, Mux invert, or invert)
- special cells like (filler cells, well tap cells, de-coupling cap cells, Tie cells)
- special cells for clocks like (clockcells having same rise and fall transitions cells)
- special cells for ESD(electro static Discharge (antenna diode cells)
- special cells like tristate cells
- power optimized cells like (clock gating cells, SRPG cells, level-shifter cells)
For further studies of Chip designing articles
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