Atmel AVR1019 Montage- und Bedienungsanleitung

Atmel AVR1019: Migration from

ATxmega128A1/64A1 to ATxmega1281U/64A1U

Features

• Enhancements and added functions

• Reset sources

• I/O ports

• DAC – digital to analog converter

• AC – analog comparator

1 Introduction

This application note is a guide to assist users of ATxmega128A1/64A1 in

converting designs to Atmel ATxmega128A1U/64A1U. For complete device details,

always refer to the most recent version of the ATxmega128A1U/64A1U datasheet

and the Atmel®AVR®XMEGA®AU manual. Errata differences between

ATxmega128A1/64A1 and ATxmega128A1U/64A1U are not listed in this

document, only in the device datasheet.

In addition to the differences described in this document, other typical

characteristics could be different. Please check the latest datasheet for details.

ATxmega128A1U/64A1U also includes new configuration options and functions. As

far as possible these are implemented as a superset of existing

ATxmega128A1/64A1 functions, so existing code for these devices will work on the

new devices without changing existing configuration or enabling new functions. The

new options and functions are listed in the application note for customers who in

addition to a pure migration also wish to see an overview to consider use of the

new functions.

8-bit Atmel

Microcontrollers

Application Note

Rev. 8415A-AVR-07/11

2 Atmel AVR1019 8415A-AVR-07/11

2 Enhancements and added functions

In this section, we summarize the enhancements or added features in Atmel

ATxmega128A1U/64A1U compared with Atmel ATxmega128A1/64A1. For pure

migration, you can skip the section and start from the next section.

2.1 USB

•One USB 2.0 full speed (12Mbps) and low speed (1.5Mbps) device compliant

interface is added

2.2 Clock system

•A divide-by-two option for the PLL output that enables output frequency down to

10MHz

•PLL lock failure detection with optionally Non-Maskable Interrupt (NMI), for

improved safety and robustness

•Non-prescaled Real Time Counter clock source options: External clock from

TOSC1, 32.768kHz from TOSC, and the 32.768kHz from the 32.768kHz Internal

Oscillator

•The 32MHz Internal Oscillator can be tuned to run at any frequency between

30MHz and 55MHz

2.3 I/O ports

•Alternate pin locations for Timer/Counter 0 Compare Channels, USART0 and SPI

•Alternate pin locations for the Peripheral Clock and Event output functions

2.4 Analog to digital converter

•Automatic input channel scan

•VCC/2 voltage reference option

•1/2x (divide by two) gain stage setting

•Internal ground can be used as negative input in differential mode (with gain)

2.5 Analog comparator

•A constant current source

2.6 CRC16/CRC32 generator

•A CRC16/CRC32 Generator Module that supports CRC16 (RC-CCITT) and CRC-

32 (IEEE 802.3)

2.7 16-bit timer/counter0

•Split mode that enable two 8-bit Timer/Counters with 4PWM channels each

2.8 High resolution extension

•Hi-Res+ option to allow PWM resolution to be increased with 8x (3-bit)

Atmel AVR1019

8415A-AVR-07/11

2.9 Power management

•Possibility to enable sequential start of the components used for analog modules

ADC and Analog Comparator in order to reduce start-up current

4 Atmel AVR1019 8415A-AVR-07/11

3 Reset sources

3.1 Brown-out detection

The programmable BODLEVEL settings are different in Atmel

ATxmega128A1U/64A1U. See Table 3-1 below for details. Please refer to the device

datasheet regarding tolerance for the Brown-out levels.

Table 3-1. Brown-out levels.

BODLEVEL VBOT – XMEGA AU VBOT – XMEGA A

111 1.6V 1.6V

110 1.8V 1.9V

101 2.0V 2.1V

011 2.4V 2.6V

010 2.6V 2.9V

000 3.0V 3.4V

Atmel AVR1019

8415A-AVR-07/11

4 I/O ports

The I/O port pins are LVTTL and LVCMOS compatible for Atmel

ATxmega128A1U/64A1U devices. The minimum “Input High Voltage” is never higher

than 2.0V for VCC > 2.7V.

In Atmel ATxmega128A1/64A1, the minimum “Input High Voltage” is 0.7VCC, and

could be higher than 2.0V for VCC>2.86V.

6 Atmel AVR1019 8415A-AVR-07/11

5 DAC – digital to analog converter

The Atmel ATxmega128A1U/64A1U DAC has two continuous output channels, and

not a sample and hold circuit as Atmel ATxmega128A1/64A1 devices. This gives

continuous time output and higher sample rate for each channel. There is separate

calibration (offset/gain) for each DAC channel in ATxmega128A1U/64A1U.

When DACA0OFFCAL (in Production Signature Row) is written to CH0OFFSETCAL

in DACA, CH1OFFSETCAL is also written with this value. The details of this

operation are shown below.

The first step,

•read DACA0OFFCAL from production signature row

•write DACA0OFFCAL to DACA.CH0OFFSETCAL

This will result in:

•DACA.CH0OFFSETCAL = DACA0OFFCAL

•DACA.CH1OFFSETCAL = DACA0OFFCAL

The second step,

•read DACA1OFFCAL from production signature row

•write DACA1OFFCAL to DACA.CH1OFFSETCAL

This will result in:

•DACA.CH1OFFSETCAL = DACA1OFFCAL

After that, any further writing to DACA.CH0OFFSELCAL does not change

DACA.CH1OFFSELCAL until the next reset. The same is implemented for both

OFFSET and GAIN calibration registers in DACA and DACB. This ensure that

customers using the ATxmega128A1/64A1 DAC can continue and use the same

calibration sequence and still calibrate both channels.

TIMCTRL register does not exist in ATxmega128A1U/64A1U, so there are no timing

constraints on DAC operation.

Atmel AVR1019

8415A-AVR-07/11

6 AC – analog comparator

In Atmel ATxmega128A1U/64A1U, there is a two-cycle delay from writing a new MUX

setting until it takes effect.

8 Atmel AVR1019 8415A-AVR-07/11

7 Registers

7.1 Removed registers and bits

The below table lists register bits, which exist in Atmel ATxmega128A1/64A1 but not

in Atmel ATxmega128A1U/64A1U.

Table 7-1. Register bits and functionality that does not exist in

ATxmega128A1U/64A1U.

FUSEBYTE2 BODACT[1:0](1) BOD functionality when in active mode

CONINTVAL[2:0] DAC Conversion Interval

TIMCTRL REFRESH[3:0] DAC Channel Refresh Timing Control

Note: 1. BODACT fuses are now located in FUSEBYTE5 for all devices.

Atmel AVR1019

8415A-AVR-07/11

8 Table of contents Features...............................................................................................1

1 Introduction......................................................................................1

2 Enhancements and added functions .............................................2

2.1 USB.....................................................................................................................2

2.2 Clock system.......................................................................................................2

2.3 I/O ports...............................................................................................................2

2.4 Analog to digital converter...................................................................................2

2.5 Analog comparator..............................................................................................2

2.6 CRC16/CRC32 generator ...................................................................................2

2.7 16-bit timer/counter0 ...........................................................................................2

2.8 High resolution extension....................................................................................2

2.9 Power management............................................................................................3

3 Reset sources ..................................................................................4

3.1 Brown-out detection ............................................................................................4

4 I/O ports............................................................................................5

5 DAC – digital to analog converter ..................................................6

6 AC – analog comparator..................................................................7

7 Registers...........................................................................................8

7.1 Removed registers and bits.................................................................................8

8 Table of contents .............................................................................9

8415A-AVR-07/11

Atmel Corporation

2325 Orchard Parkway

San Jose, CA 95131

USA

Tel: (+1)(408) 441-0311

Fax: (+1)(408) 487-2600

www.atmel.com

Atmel Asia Limited

Unit 01-5 & 16, 19F

BEA Tower, Milennium City 5

418 Kwun Tong Road

Kwun Tong, Kowloon

HONG KONG

Tel: (+852) 2245-6100

Fax: (+852) 2722-1369

Atmel Munich GmbH

Business Campus

Parkring 4

D-85748 Garching b. Munich

GERMANY

Tel: (+49) 89-31970-0

Fax: (+49) 89-3194621

Atmel Japan

9F, Tonetsu Shinkawa Bldg.

1-24-8 Shinkawa

Chou-ku, Tokyo 104-0033

JAPAN

Tel: (+81) 3523-3551

Fax: (+81) 3523-7581

Atmel®, Atmel logo and combinations thereof, AVR®, XMEGA®, and others are registered trademarks or trademarks of Atmel Corporation

or its subsidiaries. Other terms and product names may be trademarks of others.

Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to

any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL

TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS

ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE

LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION,

DAMAGES FOR LOSS AND PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO

USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or

warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and

product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically

provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel products are not intended, authorized, or

warranted for use as components in applications intended to support or sustain life.

Inhaltsverzeichnis

Andere Atmel Mikrocontroller Handbücher

Atmel

Atmel AVR180 Montage- und Bedienungsanleitung

Atmel

Atmel ATmega48PV Bedienungsanleitung

Atmel

Atmel AT40K Montage- und Bedienungsanleitung

Atmel

Atmel ATBTLC1000 BluSDK Bedienungsanleitung

Atmel

Atmel AT89STK-09 Bedienungsanleitung

Atmel

Atmel SAM D09 Montage- und Bedienungsanleitung

Atmel

Atmel ATAB5749 Montage- und Bedienungsanleitung

Atmel

Atmel ARIS+ AT88SC-ADK2 Bedienungsanleitung

Atmel

Atmel ATtiny13A Bedienungsanleitung

Atmel

Atmel SAM L22G Bedienungsanleitung

Atmel

Atmel AT90S2313 Bedienungsanleitung

Atmel

Atmel ATmega128 Bedienungsanleitung

Atmel

Atmel ATmega168PB Xplained Mini Bedienungsanleitung

Atmel

Atmel SMART ATSAMC21MOTOR Bedienungsanleitung

Atmel

Atmel AVR XMEGA AU series Bedienungsanleitung

Atmel

Atmel AT90S4433-8AC Bedienungsanleitung

Atmel

Atmel AVR AT90S2323 Bedienungsanleitung

Atmel

Atmel SMARTCARD XPRO Bedienungsanleitung

Atmel

Atmel ATF15 DK3-U Series Bedienungsanleitung

Atmel

Atmel AT97SC3205T-SDK2 Bedienungsanleitung

Atmel

Atmel AT32UC3 Series Montage- und Bedienungsanleitung

Atmel

Atmel AVR8015 Montage- und Bedienungsanleitung

Atmel

Atmel SAM4L Xplained Pro Bedienungsanleitung

Atmel

Atmel ATmega128A-STK600 Montage- und Bedienungsanleitung

Beliebte Mikrocontroller Handbücher anderer Marken

AMS

AMS AS7261 Demo Kit Bedienungsanleitung

Novatek

Novatek NT6861 Bedienungsanleitung

Espressif Systems

Espressif Systems ESP8266 SDK Einrichtungshandbuch

Nuvoton

Nuvoton ISD61S00 ChipCorder Leitfaden

STMicrolectronics

STMicrolectronics ST7 Assembler Linker Bedienungsanleitung

Texas Instruments

Texas Instruments Chipcon CC2420DK Bedienungsanleitung

Lantronix

Lantronix Intrinsyc Open-Q 865XR SOM Bedienungsanleitung

NEC

NEC 78GK0S/K 1+ Series Montage- und Bedienungsanleitung

Mikroe

Mikroe SEMITECH N-PLC Click Montage- und Bedienungsanleitung

Intel

Intel Agilex Bedienungsanleitung

Cypress

Cypress CY4607 HX2VL Bedienungsanleitung

DIGITAL-LOGIC

DIGITAL-LOGIC MICROSPACE Bedienungsanleitung

Texas Instruments

Texas Instruments TMS320F2837 D Series Bedienungsanleitung

CYPRES

CYPRES CY14NVSRAMKIT-001 Bedienungsanleitung

Texas Instruments

Texas Instruments INA-DUAL-2AMP-EVM Bedienungsanleitung

Espressif Systems

Espressif Systems ESP8266EX Betriebsanleitung

Abov

Abov AC33M8128L Bedienungsanleitung

Laird

Laird BL654PA Bedienungsanleitung