2

ATC20 Summary

1361BS–CBIC–09/02

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

Decoding the Cell Name

The table below 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. Cell Codes

Code

Description

Code

Description

AD

Adder

INVT

Inverting 3-State Buffer

AH

Half Adder

JK

JK Flip-Flop

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

SRLA

Set/Reset Latches with NAND input

DF

D Flip-Flop

SU

Subtractor

INV0

Inverter

XN

Exclusive NOR Gate

INVB

Balanced Inverter

XR

Exclusive OR Gate