AT90CAN64-16AUR Atmel, AT90CAN64-16AUR Datasheet - Page 250
AT90CAN64-16AUR
Manufacturer Part Number
AT90CAN64-16AUR
Description
MCU AVR 64K FLASH 16MHZ 64TQFP
Manufacturer
Atmel
Series
AVR® 90CANr
Datasheet
1.AT90CAN32-16AUR.pdf
(428 pages)
Specifications of AT90CAN64-16AUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
CAN, EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Data Bus Width
8 bit
Data Ram Size
4 KB
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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19.8.2
250
CANSTMOB.6
CANSTMOB.4
CANSTMOB.1
CANSTMOB.5
CANSTMOB.3
CANSTMOB.2
CANSTMOB.0
CANGIT.1
CANGIT.5
CANGIT.4
CANGIT.3
CANGIT.2
CANGIT.0
CANGIT.6
AT90CAN32/64/128
Interrupt Behavior
OVRTIM
TXOK[i]
RXOK[i]
BERR[i]
SERR[i]
CERR[i]
FERR[i]
AERR[i]
BOFFI
BXOK
SERG
CERG
FERG
AERG
Figure 19-14. CAN Controller Interrupt Structure
When an interrupt occurs, an interrupt flag bit is set in the corresponding MOb-CANSTMOB reg-
ister or in the general CANGIT register. If in the CANIE register, ENRX / ENTX / ENERR bit are
set, then the corresponding MOb bit is set in the CANSITn register.
To acknowledge a MOb interrupt, the corresponding bits of CANSTMOB register (RXOK,
TXOK,...) must be cleared by the software application. This operation needs a read-modify-write
software routine.
To acknowledge a general interrupt, the corresponding bits of CANGIT register (BXOK, BOF-
FIT,...) must be cleared by the software application. This operation is made writing a logical one
in these interrupt flags (writing a logical zero doesn’t change the interrupt flag value).
OVRTIM interrupt flag is reset as the other interrupt sources of CANGIT register and is also
reset entering in its dedicated interrupt handler.
When the CAN node is in transmission and detects a Form Error in its frame, a bit Error will also
be raised. Consequently, two consecutive interrupts can occur, both due to the same error.
When a MOb error occurs and is set in its own CANSTMOB register, no general error is set in
CANGIT register.
CANGIE.4
ENTX
CANGIE.5
ENRX
CANGIE.3
CANGIE.2
ENERR
ENBX
CANGIE.1
ENERG
CANSIT 1/2
SIT[i]
CANGIE.6
ENBOFF
CANIE 1/2
IEMOB[i]
0
i
CANGIT.7
CANIT
CANGIE.7
CANGIE.0
ENOVRT
ENIT
7679H–CAN–08/08
CAN IT
OVR IT
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