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451
Chapter 13
FCAN Interface Function
Preliminary User’s Manual U14913EE1V0UM00
13.4.4 Operating states of the CAN modules
The different operating states and the state transitions of the CAN modules are shown in the state
transition diagram in Figure 13-45.
Figure 13-45: State Transition Diagram for CAN Modules
Remark:
x = 1 to 3
Power On
RESET
or
RESET
CxCTRL[ ISTAT ] =1
INIT = 0
CxCTRL[ISTAT] = 0
INIT= 1 and
CAN bus busy
CAN bus idle
SLEEP = 1 and
CAN bus busy
CxCTRL[ISTAT] = 0
CxCTRL[SLEEP] = 1
CxCTRL[STOP] = 0
SLEEP = 0
CxCTRL[ISTAT] = 1
CxCTRL[SLEEP] = 1
CxCTRL[STOP] = 1
STOP = 1
Power Off or
RESET
Power Off or
RESET
STOP = 0
Detection of bus
transition
Power Off or
RESET
CAN bus busy
Power Off or
RESET
INIT= 1 and
CAN bus idle
SLEEP = 1 and
CAN bus idle
WAKE = 1;
Interrupt
Generation
Initialisation Mode
STOP Mode
SLEEP Mode
Normal Operation
Inter-
mediate
State
IDLE
Power off/
RESET
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