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There are two memory blocks in the PIC16F72 device. These are the program memory and the data memory. Each block has separate buses so that concurrent access can occur. Program memory and data memory are explained in this section. Program memory can be read internally by the user code (see Section 7.0). The data memory can further be broken down into the general purpose RAM and the Special Function Registers (SFRs). The operation of the SFRs that control the “core” are described here. The SFRs used to control the peripheral modules are described in the section discussing each individual peripheral module. Additional information on device memory may be found in the PIC™ Mid-Range Reference Manual, (DS33023).
High Performance, Low Power AVR® 8-Bit Microcontroller
Advanced RISC Architecture – 120 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers – Fully Static Operation
Non-volatile Program and Data Memories
– 8-bit Timer/Counter with Prescaler and Two PWM Channels
– 8-bit High Speed Timer/Counter with Separate Prescaler
– USI – Universal Serial Interface with Start Condition Detector – 10-bit ADC
4 Single Ended Channels
2 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)
Temperature Measurement
Special Microcontroller Features
I/O and Packages
Speed Grade
Industrial Temperature Range
Low Power Consumption
The ATmega644 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega644 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
In terms of connectivity, the PIC18F4520 supports various communication protocols, making it suitable for interfacing with other devices and systems. Its robust set of I/O pins provides flexibility for connecting to sensors, displays, and other components. This microcontroller is commonly used in applications such as industrial control systems, home automation, robotics, and more. The PIC18F4520’s development ecosystem is well-established, with a variety of development tools, compilers, and libraries available to aid programmers. This makes it accessible to both beginners and experienced developers.
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