1. AVR Tutorial
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... to I/O Registers I/O pins are essential for any microcontroller. They allow communication with the world. I/O pins are usually grouped into I/O ports and registers. The Atmega8 has 23 I/O ports ...

2. 8051 Microcontrollers
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... Harvard architecture core with four 8-bit I/O ports, 8 general purpose registers, 256 bytes of internal RAM, two timers/counters, UART, six basic interrupts and interface for 64 KB of external memory. ...

3. AVR Microcontrollers
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... members come with that much RAM. The data RAM space has three components: general-purpose registers, I/O memory, and internal SRAM, There are 32 general-purpose registers in all of the AVRs, but the SRAM’s ...

4. AVR Overview
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... registers, and SRAM. The AVRs have 32 single-byte registers and are classified as 8-bit RISC devices. Program Memory (Flash) Program instructions are stored in non-volatile Flash memory. Although they ...

5. AVR Instruction Set
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... than most eight-bit microcontrollers, in particular the PIC microcontrollers with which AVR competes today. Arithmetic operations work on registers R0-R31 but not directly on RAM and take one clock cycle, ...

6. AVR Tools
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... first choice commented out. AVR Fuse Calculator A tool to calculate values of configuration registers Linux Development Tools for Atmel AVR A tool chain providing powerful and easy support ...

7. AVR Soft Cores
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... VHDL. It has the same instruction timing and the same instruction set (with a few exceptions). Features • Core features: – 32 x 8 general purpose registers – Twenty three interrupt vectors  ...

8. About
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...    AVR Microcontrollers High Performance True RISC architecture True single cycle execution One MIPS per MHz 32 general purpose registers Harvard architecture With only ...