AVR microcontrollers: Difference between revisions

Revision as of 05:12, 20 April 2025

Revision as of 05:13, 20 April 2025

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* PIN''x'': Input register, used to read an input signal. On some devices, this register can be used for pin toggling: writing a logic one to a PIN''x'' bit toggles the corresponding bit in PORT''x'', irrespective of the setting of the DDR''x'' bit.<ref>[http://www.atmel.com/Images/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45-ATtiny85_Datasheet.pdf atmel.com]</ref>

Newer ATtiny AVR'sAVRs, like ATtiny817 and its siblings, have their port control registers somewhat differently defined.

xmegaAVR have additional registers for push/pull, totem-pole and pullup configurations.

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=== JTAGICE ===

The [[JTAG]] In Circuit Emulator (JTAGICE) debugging tool supports on-chip debugging (OCD) of AVRs with a JTAG interface. The original JTAGICE (sometimes retroactively referred to as JTAGICE mkI) uses an RS-232 interface to a PC and can only program AVR'sAVRs with a JTAG interface. The JTAGICE mkI is no longer in production, however it has been replaced by the JTAGICE mkII.

=== JTAGICE mkII ===