AT90CAN64 Atmel Corporation, AT90CAN64 Datasheet - Page 240

• Manufacturer Part Number: AT90CAN64
• Manufacturer: Atmel Corporation

Specifications of AT90CAN64

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Can: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

19.3
Figure 19-5. CAN Controller Structure
240
CAN Controller
AT90CAN32/64/128
The CAN controller implemented into AT90CAN32/64/128 offers V2.0B Active.
This full-CAN controller provides the whole hardware for convenient acceptance filtering and
message management. For each message to be transmitted or received this module contains
one so called message object in which all information regarding the message (e.g. identifier,
data bytes etc.) are stored.
During the initialization of the peripheral, the application defines which messages are to be sent
and which are to be received. Only if the CAN controller receives a message whose identifier
matches with one of the identifiers of the programmed (receive-) message objects the message
is stored and the application is informed by interrupt. Another advantage is that incoming remote
frames can be answered automatically by the full-CAN controller with the corresponding data
frame. In this way, the CPU load is strongly reduced compared to a basic-CAN solution.
Using full-CAN controller, high baudrates and high bus loads with many messages can be
handled.
CAN Data Buffers
Buffer MOb i
Buffer MOb2
Buffer MOb1
Buffer MOb0
Ma i lb ox
Message Objets
Control
Status
IDtag+IDmask
Time Stamp
Control
Status
IDtag+IDmask
Time Stamp
Control
Status
IDtag+IDmask
Time Stamp
Control
Status
IDtag+IDmask
Time Stamp
MOb i
MOb2
MOb1
MOb0
Scanning
MOb
Low priority
High priority
Gen. Control
Gen. Status
Enable MOb
Interrupt
Bit Timing
Line Error
CAN Timer
CAN Channel
MAC
LCC
PLS
7679H–CAN–08/08
Internal
Internal
RxCAN
TxCAN