Mega128 CAN Übersicht


Der Mikrocontroller AT90CAN stammt aus der AVR-Familie von ATMEL. Es handelt sich um einen low-power Mikrocontroller mit Advanced RISC Architecture. Hier folgt eine kurze Zusammenstellung der Hardwareressourcen:


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
• 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
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
Programming Lock for Software Security


JTAG (IEEE std. 1149.1 Compliant) Interface

Boundary-scan Capabilities According to the JTAG Standard
Programming Flash (Hardware ISP), EEPROM, Lock & Fuse Bits
Extensive On-chip Debug Support


CAN Controller 2.0A & 2.0B - ISO 16845 Certified (1)

15 Full Message Objects with Separate Identifier Tags and Masks
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)


Peripheral Features

Programmable Watchdog Timer with On-chip Oscillator
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
• 10-bit Prescaler
• External Event Counter
• Output Compare or 8-Bit PWM Output
• 32Khz Oscillator for RTC Operation
Dual 16-bit Synchronous Timer/Counters-1 & 3
• 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 (-40°C to +85°C)


Maximum Frequency: 8 MHz at 2.7V, 16 MHz at 4.5V