AT90CAN128-16AE ATMEL Corporation, AT90CAN128-16AE Datasheet - Page 235

• Manufacturer Part Number: AT90CAN128-16AE
• Description: 8-bit Avr Microcontroller With 128K Bytes of Isp Flash And CAN Controller.flash (Kbytes) 128 Vcc (V) 2.7-5.5 EEPROM (Kbytes) 4 SRAM (bytes) 4K CAN (mess. Obj.) 15
• Manufacturer: ATMEL Corporation

CAN Channel
Configuration
Bit Timing
4250C–CAN–03/04
The CAN channel can be in:
•
•
•
Figure 113. Listening Mode
FSM’s (Finite State Machine) of the CAN channel need to be synchronous to the time
quantum. So, the input clock for bit timing is the clock used into CAN channel FSM’s.
Field and segment abbreviations:
•
•
•
•
•
•
•
In this mode:
In standby mode:
This mode is transparent for the CAN channel:
Enabled mode
–
–
Standby mode
–
–
–
Listening mode
–
–
–
–
BRP: Baud Rate Prescaler
TQ: Time Quantum
SYNS: SYNchronization Segment
PRS: PRopagation time Segment
PHS1: PHase Segment 1
PHS2: PHase Segment 2
SJW: (Re) Synchronization Jump Width
the CAN channel (internal TXDCAN & RXDCAN) is enabled,
the input clock is enabled.
the transmitter constantly provides a recessive level (on internal TXDCAN)
and the receiver is disabled,
input clock is enabled,
the registers and pages remain accessible.
enables a hardware loop back, internal TXDCAN on internal RXDCAN
provides a recessive level on TXDCAN pin
does not disable RXDCAN
freezes TEC and REC error counters
RXDcan
LISTEN
TXDcan
internal
internal
1
0
PD5
PD6
TXDcan
RXDcan
AT90CAN128
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