AT90CAN128

• 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
128K Bytes of In-System Reprogrammable Flash
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
4K Bytes EEPROM (Endurance: 100,000 Write/Erase Cycles)
4K Bytes Internal SRAM
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
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 to +85)
• Maximum Frequency
8 MHz at 2.7V - Industrial range
16 MHz at 4.5V - Industrial range

The AT90CAN128 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 AT90CAN128 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 conventional CISC microcontrollers.
The AT90CAN128 provides the following features: 128K bytes of In-System Programmable Flash with Read-While-Write capabilities, 4K bytes EEPROM, 4K bytes SRAM, 53 general purpose I/O lines, 32 general purpose working registers, a CAN controller, 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 differential 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 saving modes.

The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI/CAN ports and interrupt system to continue functioning. The AT90CAN128 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 maintain 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 Atmel's 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 combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip, the Atmel AT90CAN128
is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded control applications.

The AT90CAN128 AVR is supported with a full suite of program and system development tools including: C compilers, macro assemblers, program debugger/simulators, incircuit emulators, and evaluation kits.

Applications that use the ATmega128 AVR microcontroller can be made compatible to use the AT90CAN128, refer to Application Note AVR 096, on the Atmel web site.