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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
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
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.
®
®
XMEGA
AU manual. Errata differences between
are
implemented
as
a
superset
of
8-bit Atmel
Microcontrollers
Application Note
existing
Rev. 8415A-AVR-07/11
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Table of Contents
Related Manuals for Atmel AVR1019
Summary of Contents for Atmel AVR1019
-
Page 1: Features
• AC – analog comparator Application Note 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 ® ®... -
Page 2: Enhancements And Added Functions
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... -
Page 3: Power Management
Atmel AVR1019 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 8415A-AVR-07/11... -
Page 4: Reset Sources
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 1.6V 1.6V 1.8V 1.9V 2.0V 2.1V 2.4V 2.6V 2.6V 2.9V 3.0V 3.4V Atmel AVR1019 8415A-AVR-07/11... -
Page 5: O Ports
LVTTL LVCMOS compatible 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. 8415A-AVR-07/11... -
Page 6: Dac - Digital To Analog Converter
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. -
Page 7: Ac - Analog Comparator
Atmel AVR1019 6 AC – analog comparator In Atmel ATxmega128A1U/64A1U, there is a two-cycle delay from writing a new MUX setting until it takes effect. 8415A-AVR-07/11... -
Page 8: Registers
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. Register name Register bit Function... -
Page 9: Table Of Contents
Atmel AVR1019 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 ................... - Page 10 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...