Controller Circuit

This chip is a low microcontroller. With executing instruction in a single clock cycle, this IC is achieving throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power.

ATMega8535 Features.
• High-performance, Low-power AVR® 8-bit Microcontroller
• Advanced RISC Architecture
– 130 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 16 MIPS Throughput at 16 MHz
– On-chip 2-cycle Multiplier
• Nonvolatile Program and Data Memories
– 8K Bytes of In-System Self-Programmable Flash
Endurance: 10,000 Write/Erase Cycles
– Optional Boot Code Section with Independent Lock Bits
In-System Programming by On-chip Boot Program
True Read-While-Write Operation
– 512 Bytes EEPROM
Endurance: 100,000 Write/Erase Cycles
– 512 Bytes Internal SRAM
– Programming Lock for Software Security
• Peripheral Features
– Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes
– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture
Mode
– Real Time Counter with Separate Oscillator
– Four PWM Channels
– 8-channel, 10-bit ADC
8 Single-ended Channels
7 Differential Channels for TQFP Package Only
2 Differential Channels with Programmable Gain at 1x, 10x, or 200x for TQFP
Package Only
– Byte-oriented Two-wire Serial Interface
– Programmable Serial USART
– Master/Slave SPI Serial Interface
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
• Special Microcontroller Features
– Power-on Reset and Programmable Brown-out Detection
– Internal Calibrated RC Oscillator
– External and Internal Interrupt Sources
– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby
and Extended Standby
• I/O and Packages
– 32 Programmable I/O Lines
– 40-pin PDIP, 44-lead TQFP, 44-lead PLCC, and 44-pad QFN/MLF
• Operating Voltages
– 2.7 - 5.5V for ATmega8535L
– 4.5 - 5.5V for ATmega8535
• Speed Grades
– 0 - 8 MHz for ATmega8535L
– 0 - 16 MHz for ATmega8535

ATMEGA8535 has addressing space of data memory and program memory that is separate. Data memory is divided 3 parts; 32 general registers, 64 registers I/O and 512 bytes SRAM Internal.

Generals register occupies space data at address under, that is $00 until $1F. Special register to handle I/O and control to microcontroller occupies 64 addresses that is start from $20 until $5F. The register is special register applied to arrange function to various microcontroller peripheral, like register control, timer/counter, I/O functions etc. Located program memory in Flash PEROM lapped over in word or 2 byte because every instruction has breadth 16-bit or 32-bit. AVR ATMEGA8535 has 4KByte x 16-bit Flash PEROM with address starts from $000 until $FFF. This AVR has 12-bit Program Counter so that can give address at contents of Flash. Besides, AVR this type also has data memory in the form of EEPROM 8-bit 512 bytes.