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Atmel公司的AT90CAN128 是8位带有128B ISP Flash和CAN控制器的微控制器,它采用AVR增强型RISC架构,有丰富的指令集和32个通用的工作寄存器,吞吐量达到1 MIPS /MHz,广泛应用于汽车电子,工业控制以及家庭网关等。本文介绍了AT90CAN128的主要性能,方框图以及用于汽车网关的开发板ATAVRAUTO100的主要性能与详细电路图。
AT90CAN128 8-bit Microcontroller with 128K Bytes of ISP Flash and CAN Controller
The AT90CAN32/64/128 is a low-Power CMOS 8-bit microcontroller based on the AVR enhancedRISC architecture. By executing poweRFul instructions in a single clockcycle, the AT90CAN32/64/128 achieves throughputs approaching 1 MIPS perMHz allowing the system designer to optimize power consumption versusprocessing speed.
The AVR core combines a rich instruction setwith 32 general purpose working registers. All 32 registers aredirectly connected to the Arithmetic Logic Unit (ALU), allowing twoindependent registers to be accessed in one single instruction executedin one clock cycle. The resulting architecture is more code efficientwhile achieving throughputs up to ten times faster than conventionalCISC microcontrollers.
The AT90CAN32/64/128 provides thefollowing features: 32K/64K/128K bytes of In-System Programmable Flashwith Read-While-Write capabilities, 1K/2K/4K bytes EEPROM, 2K/4K/4Kbytes SRAM, 53 general purpose I/O lines, 32 general purpose workingregisters, a CAN controller, Real Time Counter (RTC), four flexibleTimer/Counters with compare modes and PWM, 2 USARTs, a byte orientedTwo-wire Serial Interface, an 8-channel 10-bit ADC with optionaldifferential input stage with programmable gain, a programmableWatchdog Timer with Internal Oscillator, an SPI serial port, IEEE std.1149.1 compliant JTAG test interface, also used for accessing theOn-chip Debug system and programming and five software selectable powersaving modes.
主要特性: 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 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: Automotive (-40°C to +125°C) Maximum Frequency: 8 MHz at 2.7V, 16 MHz at 4.5V
图1. AT90CAN128方框图
AT90CAN128开发板ATAVRAUTO100 Thisboard includes all elements necessary for designers to quickly developcode related to CAN and LIN communication gateway implementing theAT90CAN128 and for prototyping and testing of new designs.
图2. ATAVRAUTO100外形图 The ATAVRAUTO100 provides the following features: AT90CAN128 QFN64, AVR Studio software interface , Power supply: regulated 5.0V out of the VBAT (typical 12V) from the LIN connector JTAG connector: for on-chip In Situ Programming (ISP) for on-chip debugging using JTAG ICE Serial interfaces: 1 CAN interface (High Speed and Low Speed) 1 LIN interface 1.3 and 2.0 compliant (Software library available on the Atmel website for LIN 1.3). On-board resources: 1 high speed CAN transceiver ATA6660 1 LIN transceiver ATA6621 implementing one 5.0V voltage regulator and a watchdog 1 blue LED 1 Jumper to add a 1Kpull-up resistor when Master mode is selected (LIN) On-board In Situ Programming jumper System clock: 8 MHz crystal Dimension: 45 mm x 45 mm
图3.ATAVRAUTO100 开发板电路图
上表位ATAVRAUTO100 开发板所用材料清单 |
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