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1.4 Product Family
Introduction
STD150
1-8
Samsung ASIC
1.4.2 STANDARD LOGIC CELLS
Samsung standard cell library is designed to enable designers to achieve the
high-integration with best performance in STD150. In addition, this standard cell
library is carefully verified on silicon to ensure much higher manufacturability.
Due to this, System-On-Chips (SoC) designed using these standard cells will be
obtained much higher yield. Rich standard cells, consisting of about 410 cells,
with at least four drive strengths have been optimized specifically for synthesis
and place and route tools.
The cells were selected to achieve best performance with synthesis tool and to
give designers the elements the need to create high-integration designs. Each
cell has been carefully hand-crafted to provide the optimal solution for high-inte-
gration applications with best performance.
Each of cells has been very accurately modeled for both timing and power to
guarantee timing closure and to eliminate many meaningless iterative design
cycles. All models are carefully qualified and tested using the in-house library
automation environment. Some of features in STD150 standard cell library are
summarized as follows:
- Complete optimized library with synthesis and place and route tool
- Hand-crafted layouts for the optimal densities for each process
- Low manufacturing cost
- Reducing design time
- Providing more accurate timing and power
- Complete interfaces with all popular EDA tools
STD150 standard cell library contains a protection diode cell. The protection
diode cell is used to avoid the antenna effect. During place and route, the router
may connect wires to the input gates of cells that are longer than the maximum
length allowable by the antenna effect rule. The protection diode cell can be
used in this case to add a diode on the net close to the input gates which do not
meet the rule. Also, the protection diode can be added to the input drivers of soft-
macro cores. The protection diode cell is composed of forward and reverse
diodes. It is not included in this databook.
In addition, STD150 standard cell library contains several filler cells. During
place and route, the filler cells are used to connect power and ground rails
across an area including no cells. The filler cells are also used to make sure that
gaps do not occur between well or implant layers which may cause some of
design rule violations.