AT90CAN128-16MI Atmel, AT90CAN128-16MI Datasheet - Page 235
![IC MCU AVR FLASH 128K 64-QFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
AT90CAN128-16MI
Manufacturer Part Number
AT90CAN128-16MI
Description
IC MCU AVR FLASH 128K 64-QFN
Manufacturer
Atmel
Series
AVR® 90CANr
Specifications of AT90CAN128-16MI
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
128KB (128K x 8)
Program Memory Type
FLASH
Eeprom Size
4K 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-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
For Use With
ATDVK90CAN1 - KIT DEV FOR AT90CAN128 MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90CAN128-16MI
Manufacturer:
ATMEL
Quantity:
430
Company:
Part Number:
AT90CAN128-16MI
Manufacturer:
ATMEL
Quantity:
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19.2.2
19.2.2.1
Figure 19-1. CAN Standard Frames
7679H–CAN–08/08
Message Formats
Can Standard Frame
Interframe
Interframe
Data Frame
Remote Frame
Space
Space
Bus Idle
Bus Idle
by which the dominant state overwrites the recessive state. The competition for bus allocation is
lost by all nodes with recessive transmission and dominant observation. All the "losers" automat-
ically become receivers of the message with the highest priority and do not re-attempt
transmission until the bus is available again.
The CAN protocol supports two message frame formats, the only essential difference being in
the length of the identifier. The CAN standard frame, also known as CAN 2.0 A, supports a
length of 11 bits for the identifier, and the CAN extended frame, also known as CAN 2.0 B, sup-
ports a length of 29 bits for the identifier.
A message in the CAN standard frame format begins with the "Start Of Frame (SOF)", this is fol-
lowed by the "Arbitration field" which consist of the identifier and the "Remote Transmission
Request (RTR)" bit used to distinguish between the data frame and the data request frame
called remote frame. The following "Control field" contains the "IDentifier Extension (IDE)" bit
and the "Data Length Code (DLC)" used to indicate the number of following data bytes in the
"Data field". In a remote frame, the DLC contains the number of requested data bytes. The "Data
field" that follows can hold up to 8 data bytes. The frame integrity is guaranteed by the following
"Cyclic Redundant Check (CRC)" sum. The "ACKnowledge (ACK) field" compromises the ACK
slot and the ACK delimiter. The bit in the ACK slot is sent as a recessive bit and is overwritten as
a dominant bit by the receivers which have at this time received the data correctly. Correct mes-
sages are acknowledged by the receivers regardless of the result of the acceptance test. The
end of the message is indicated by "End Of Frame (EOF)". The "Intermission Frame Space
(IFS)" is the minimum number of bits separating consecutive messages. If there is no following
bus access by any node, the bus remains idle.
SOF
SOF
SOF
SOF
11-bit identifier
11-bit identifier
ID10..0
ID10..0
Arbitration
Arbitration
Field
Field
RTR IDE r0
RTR IDE r0
Control
Control
Field
Field
4-bit DLC
4-bit DLC
DLC4..0
DLC4..0
15-bit CRC
CRC
Field
0 - 8 bytes
Data
Field
CRC
del.
ACK
ACK
Field
ACK
del.
End of
Frame
7 bits
15-bit CRC
CRC
Field
AT90CAN32/64/128
Intermission
3 bits
CRC
del.
Interframe
ACK
Space
Field
ACK
(Indefinite)
ACK
Bus Idle
del.
End of
Frame
7 bits
Intermission
3 bits
Interframe
Space
(Indefinite)
Bus Idle
235
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