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Chapter 14
FCAN Interface Function
Preliminary User’s Manual U15839EE1V0UM00
14.4.4 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 14-45.
Figure 14-45:
State Transition Diagram for CAN Modules
Remark:
x = 1 to 4 for the derivatives µPD703129(A) and µPD703129(A1), x = 1 to 2 for the deriva-
tive µPD703128(A).
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] = 0
CxCTRL[SLEEP] = 1
CxCTRL[STOP] = 1
STOP = 1
Power Off or
RESET
Power Off or
RESET
STOP = 0 and
SLEEP = 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
Summary of Contents for mPD703128
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