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AT90S8535-8JI Datasheet(PDF) 2 Page - ATMEL Corporation |
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AT90S8535-8JI Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 10 page AT90S/LS4434 and AT90S/LS8535 2 Block Diagram The AVR core combines a rich instruction set with 32 gen- eral purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving through- puts up to ten times faster than conventional CISC micro- controllers. The AT90S4434/8535 provides the following features: 4K/8K bytes of In-System Programmable Flash, 256/512 bytes EEPROM, 256/512 bytes SRAM, 32 general purpose I/O lines, 32 general purpose working registers, RTC, three flexible timer/counters with compare modes, internal and external interrupts, a programmable serial UART, 8-chan- nel, 10-bit ADC, programmable Watchdog Timer with inter- nal oscillator, an SPI serial port and three software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, timer/counters, SPI port and interrupt system to continue functioning. The Power Down mode saves the register contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hardware reset. In Power Save mode, the timer oscillator continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping. The device is manufactured using Atmel’s high density non-volatile memory technology. The on-chip ISP Flash PROGRAM COUNTER INTERNAL OSCILLATOR WATCHDOG TIMER STACK POINTER PROGRAM FLASH MCU CONTROL REGISTER SRAM GENERAL PURPOSE REGISTERS INSTRUCTION REGISTER TIMER/ COUNTERS INSTRUCTION DECODER DATA DIR. REG. PORTB DATA DIR. REG. PORTA DATA DIR. REG. PORTD DATA DIR. REG. PORTC DATA REGISTER PORTB DATA REGISTER PORTA ANALOG MUX ADC DATA REGISTER PORTD DATA REGISTER PORTC PROGRAMMING LOGIC TIMING AND CONTROL OSCILLATOR OSCILLATOR INTERRUPT UNIT EEPROM SPI UART STATUS REGISTER Z Y X ALU PORTB DRIVERS PORTA DRIVERS PORTD DRIVERS PORTC DRIVERS PB0 - PB7 PA0 - PA7 RESET VCC AVCC AGND AREF GND XTAL2 XTAL1 CONTROL LINES PD0 - PD7 PC0 - PC7 8-BIT DATA BUS |
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