Operating States Of The Can Modules; Figure 14-45: State Transition Diagram For Can Modules - NEC V850E/CA2 JUPITER Preliminary User's Manual

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

Power On
RESET
or
RESET
STOP = 0 and
SLEEP = 0
STOP Mode
CxCTRL[ISTAT] = 0
CxCTRL[SLEEP] = 1
CxCTRL[STOP] = 1
STOP = 1
Remark: x = 1 to 4 for the derivatives µPD703129(A) and µPD703129(A1), x = 1 to 2 for the deriva-
tive µPD703128(A).
514
Chapter 14 FCAN Interface Function
Initialisation Mode
CxCTRL[ ISTAT ] =1
Power Off or
RESET
Idle
Power Off or
RESET
Power Off or
RESET
SLEEP = 0
SLEEP Mode
CxCTRL[ISTAT] = 0
CxCTRL[SLEEP] = 1
CxCTRL[STOP] = 0
Preliminary User's Manual U15839EE1V0UM00
CAN bus idle
Inter-
INIT= 1 and
mediate
CAN bus idle
State
INIT= 1 and
CAN bus busy
Power Off or
RESET
WAKE = 1;
Interrupt
Generation
Detection of bus
transition
SLEEP = 1 and
CAN bus idle
INIT = 0
CAN bus busy
Normal Operation
CxCTRL[ISTAT] = 0
SLEEP = 1 and
CAN bus busy