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1389CS–CASIC–06-Nov-06

ATC18 Summary

2.

Standard Cell Library SClib

The Atmel Standard Cell Library, SClib, contains a comprehensive set of combinational logic

and storage cells. The SClib library includes cells which belong to the following categories:

• Buffers and Gates

• Multiplexers

• Flip-flops

• Scan Flip-flops

•Latches

• Adders and Subtractors

2.1

Decoding the Cell Name

Table 2-1 shows the naming conventions for the cells in the SClib library. Each cell name begins

with either a two-, three-, or four-letter code that defines the type of cell. This indicates the range

of standard cells available.

Table 2-1.

Cell Codes

Code

Description

Code

Description

AD

Adder

INVB

Balanced Inverter

AH

Half Adder

INVT

Inverting 3-State Buffer

AS

Adder/Subtractor

LA

D Latch

AN

AND Gate

MI

Inverting Multiplexer

AOI

AND-OR-Invert Gate

MX

Multiplexer

AON

AND-OR-AND-Invert Gates

ND

NAND Gate

AOR

AND-OR Gate

NR

NOR Gate

BH

Bus Holder

OAI

OR-AND-Invert Gate

BUFB

Balanced Buffer

OAN

OR-AND-OR-Invert Gates

BUFF

Non-Inverting Buffer

OR

OR Gate

BUFT

Non-Inverting 3-State Buffer

ORA

OR-AND Gate

CG

Carry Generator

SD

Multiplexed Scan D Flip-Flop

CLK2

Clock Buffer

SE

Multiplexed Scan Enable D Flip-Flop

DE

D-Enabled Flip-Flop

SU

Subtractor

DF

D Flip-Flop

XN

Exclusive NOR Gate

INV0

Inverter

XR

Exclusive OR Gate