Features High-performance, Low-power AVR 8-bit Microcontroller Advanced RISC Architecture 133 Powerful Instructions Most Single Clock Cycle Execution 32 x 8 General Purpose Working Registers + Peripheral Control Registers Fully Static Operation Up to 16 MIPS Throughput at 16 MHz On-chip 2-cycle Multiplier Non volatile Program and Data Memories 32K/64K/128K Bytes of In-System Reprogrammable Flash (AT90CAN32/64/128) Endurance: 10,000 Write/Erase Cycles Optional Boot Code Section with Independent Lock Bits 8-bit Selectable Boot Size: 1K Bytes, 2K Bytes, 4K Bytes or 8K Bytes In-System Programming by On-Chip Boot Program (CAN, UART, ...) True Read-While-Write Operation Microcontroller 1K/2K/4K Bytes EEPROM (Endurance: 100,000 Write/Erase Cycles) (AT90CAN32/64/128) 2K/4K/4K Bytes Internal SRAM (AT90CAN32/64/128) Up to 64K Bytes Optional External Memory Space with Programming Lock for Software Security JTAG (IEEE std. 1149.1 Compliant) Interface 32K/64K/128K Boundary-scan Capabilities According to the JTAG Standard Programming Flash (Hardware ISP), EEPROM, Lock & Fuse Bits Extensive On-chip Debug Support Bytes of (1) CAN Controller 2.0A & 2.0B - ISO 16845 Certified 15 Full Message Objects with Separate Identifier Tags and Masks ISP Flash Transmit, Receive, Automatic Reply and Frame Buffer Receive Modes 1Mbits/s Maximum Transfer Rate at 8 MHz Time stamping, TTC & Listening Mode (Spying or Autobaud) and Peripheral Features Programmable Watchdog Timer with On-chip Oscillator CAN Controller 8-bit Synchronous Timer/Counter-0 10-bit Prescaler External Event Counter Output Compare or 8-bit PWM Output 8-bit Asynchronous Timer/Counter-2 AT90CAN32 10-bit Prescaler External Event Counter Output Compare or 8-Bit PWM Output AT90CAN64 32Khz Oscillator for RTC Operation Dual 16-bit Synchronous Timer/Counters-1 & 3 AT90CAN128 10-bit Prescaler Input Capture with Noise Canceler External Event Counter 3-Output Compare or 16-Bit PWM Output Output Compare Modulation 8-channel, 10-bit SAR ADC 8 Single-ended Channels 7 Differential Channels 2 Differential Channels With Programmable Gain at 1x, 10x, or 200x On-chip Analog Comparator Byte-oriented Two-wire Serial Interface Dual Programmable Serial USART Master/Slave SPI Serial Interface Programming Flash (Hardware ISP) Special Microcontroller Features Power-on Reset and Programmable Brown-out Detection Internal Calibrated RC Oscillator 8 External Interrupt Sources 5 Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down & Standby Software Selectable Clock Frequency Global Pull-up Disable I/O and Packages 53 Programmable I/O Lines 64-lead TQFP and 64-lead QFN Operating Voltages: 2.7 - 5.5V Operating temperature: Industrial (-40C to +85C) Maximum Frequency: 8 MHz at 2.7V, 16 MHz at 4.5V Rev. 7679HCAN08/08 Note: 1. Details on section 19.4.3 on page 242. 1. Description 1.1 Comparison Between AT90CAN32, AT90CAN64 and AT90CAN128 AT90CAN32, AT90CAN64 and AT90CAN128 are hardware and software compatible. They dif- fer only in memory sizes as shown in Table 1-1. Table 1-1. Memory Size Summary Device Flash EEPROM RAM AT90CAN32 32K Bytes 1K Byte 2K Bytes AT90CAN64 64K Bytes 2K Bytes 4K Bytes AT90CAN128 128K Bytes 4K Byte 4K Bytes 1.2 Part Description The AT90CAN32/64/128 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 AT90CAN32/64/128 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general purpose working registers. All 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 throughputs up to ten times faster than con- ventional CISC microcontrollers. The AT90CAN32/64/128 provides the following features: 32K/64K/128K bytes of In-System Pro- grammable Flash with Read-While-Write capabilities, 1K/2K/4K bytes EEPROM, 2K/4K/4K bytes SRAM, 53 general purpose I/O lines, 32 general purpose working registers, a CAN con- troller, Real Time Counter (RTC), four flexible Timer/Counters with compare modes and PWM, 2 USARTs, a byte oriented Two-wire Serial Interface, an 8-channel 10-bit ADC with optional differ- ential input stage with programmable gain, a programmable Watchdog Timer with Internal Oscillator, an SPI serial port, IEEE std. 1149.1 compliant JTAG test interface, also used for accessing the On-chip Debug system and programming and five software selectable power sav- ing modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI/CAN ports 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 asynchronous timer continues to run, allowing the user to main- tain a timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except Asynchronous Timer and ADC, to minimize switching noise during ADC conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption. The device is manufactured using Atmels high-density nonvolatile memory technology. The On- chip ISP Flash allows the program memory to be reprogrammed in-system through an SPI serial interface, by a conventional nonvolatile memory programmer, or by an On-chip Boot program running on the AVR core. The boot program can use any interface to download the application program in the application Flash memory. Software in the Boot Flash section will continue to run while the Application Flash section is updated, providing true Read-While-Write operation. By 2 AT90CAN32/64/128 7679HCAN08/08