AT90CAN64 Atmel Corporation, AT90CAN64 Datasheet - Page 244

• 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

19.5.2
19.5.2.1
19.5.2.2
19.5.2.3
244
AT90CAN32/64/128
Operating Modes
Disabled
Tx Data & Remote Frame
Rx Data & Remote Frame
There is no default mode after RESET.
Every MOb has its own fields to control the operating mode. Before enabling the CAN periph-
eral, each MOb must be configured (ex: disabled mode - CONMOB=00).
Table 19-1.
In this mode, the MOb is “free”.
1. Several fields must be initialized before sending:
2. The MOb is ready to send a data or a remote frame when the MOb configuration is set
3. Then, the CAN channel scans all the MObs in Tx configuration, finds the MOb having
4. When the transmission is completed the TXOK flag is set (interrupt).
5. All the parameters and data are available in the MOb until a new initialization.
1. Several fields must be initialized before receiving:
MOb Configuration
0
0
1
1
– Identifier tag (IDT)
– Identifier extension (IDE)
– Remote transmission request (RTRTAG)
– Data length code (DLC)
– Reserved bit(s) tag (RBnTAG)
– Data bytes of message (MSG)
(CONMOB).
the highest priority and tries to send it.
– Identifier tag (IDT)
– Identifier mask (IDMSK)
– Identifier extension (IDE)
– Identifier extension mask (IDEMSK)
– Remote transmission request (RTRTAG)
– Remote transmission request mask (RTRMSK)
– Data length code (DLC)
– Reserved bit(s) tag (RBnTAG)
MOb Configuration
0
1
0
1
Reply Valid
x
x
x
x
0
1
x
RTR Tag
0
1
0
1
x
x
Disabled
Tx Data Frame
Tx Remote Frame
Rx Data Frame
Rx Remote Frame
Rx Remote Frame then, Tx Data Frame (reply)
Frame Buffer Receive Mode
Operating Mode
7679H–CAN–08/08