ATC20 데이터 시트보기 (PDF) - Atmel Corporation

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ATC20

Cell-based ASIC

Atmel Corporation 

ATC20 Summary

Oscillator Cell

Library Osc18lib

The Atmel Oscillator Library provides stable clock sources. It comprises five oscillators

and one power-on-reset.

The Atmel two-pad oscillators are designed with the Pierce three-point oscillator struc-

ture. For the 32.768 kHz oscillator, the load capacitance must be between 6 pF and 12.5

pF. For high-frequency oscillators, the load capacitance must be between 15 pF and 20

pF. External capacitors must be added in order to obtain the correct load capacitance.

Clock output is high at off state (onosc = 0).

The oscillators provide a bypass mode (onosc = 0), clock = not (xin).

Table 13 gives the available Osc18lib cells and their major characteristics.

Table 13. Oscillator and POR Cells

Cell Name

Description

OSC18f33K

Low frequency, optimized for 32.786 kHz crystal

OSC18f9M

4 - 9 MHz crystal oscillator

OSC18f16M

8 - 16 MHz crystal oscillator

OSC18f27M

10 - 27 MHz crystal oscillator

OSC33KLP

32.786 Hz uPower crystal oscillator. Low frequency,

optimized for 32.786 kHz crystal

POR18

Static and dynamic reset with internal hysterisis

Basic Analog Cell

Library ANA18lib,

ANA25lib, ANA33lib

The Atmel CBIC analog library makes the following parts available:

• Multiplexer modules

– Multiplexers to minimize cross-talk (for use with high-impedance nodes).

– Multiplexers to minimize ON resistance.

• Analog input and output cells

• Analog power and ground cells

A special set of basic analog I/O cells, ANA25lib (ANA33lib), is available for interfacing

with external 2.5V (3.3V) devices.

General-purpose

Analog Cell Library

GPlib

The General-purpose Analog Cell Library (GPlib) is composed of cells performing vari-

ous analog functions.

Currently available are regulators, power management cells, op amps, comparators,

ADCs and DACs. All these cells are on request only. Additional high-performance, com-

plex analog cells can be developed according to specific customer requirements.

7

1361BS–CBIC–09/02

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