Texas Instruments TMS570LC4357

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1232
SPNU563A–March 2018
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FlexRay Module
Table 26-6. State Transitions of Communication Controller Overall State Machine
T# Condition From To
1 Hardware reset All States DEFAULT_CONFIG
2 Command CONFIG, SUCC1.CMD(3-0) = 0001 DEFAULT_CONFIG CONFIG
3 Unlock sequence followed by command MONITOR_MODE,
SUCC1.CMD(3-0) = 1011
CONFIG MONITOR_MODE
4 Command CONFIG, SUCC1.CMD(3-0) = 0001 MONITOR_MODE CONFIG
5 Unlock sequence followed by command READY, SUCC1.CMD(3-0) =
0010
CONFIG READY
6 Command CONFIG, SUCC1.CMD(3-0) = 0001 READY CONFIG
7 Command WAKEUP, SUCC1.CMD(3-0) = 0011 READY WAKEUP
8 Complete, non-aborted transmission of wakeup pattern OR received
WUP OR received frame header OR command READY,
SUCC1.CMD(3-0) = 0010
WAKEUP READY
9 Command RUN, SUCC1.CMD(3-0) = 0100 READY STARTUP
10 Successful startup STARTUP NORMAL_ACTIVE
11 Clock correction failed counter reached “maximum without clock
correction passive” limit configured by SUCC3.WCP(3-0)
NORMAL_ACTIVE NORMAL_PASSIVE
12 Number of valid correction terms reached the Passive to Active limit
configured by SUCC1.PTA(4-0)
NORMAL_PASSIVE NORMAL_ACTIVE
13 Command READY, SUCC1.CMD(3-0) = 0010 STARTUP,
NORMAL_ACTIVE,NORMAL
_PASSIVE
READY
14 Clock Correction Failed counter reached “maximum without clock
correction fatal” limit configured by SUCC3.WCF(3-0) AND bit
SUCC1.HCSE set to 1 OR command HALT, SUCC1.CMD(3-0) = 0110
NORMAL_ACTIVE HALT
15 Clock Correction Failed counter reached “maximum without clock
correction fatal” limit configured by SUCC3.WCF(3-0) AND bit
SUCC1.HCSE set to 1 OR command HALT, SUCC1.CMD(3-0) = 0110
NORMAL_PASSIVE HALT
16 Command FREEZE, SUCC1.CMD(3-0) = 0111 All States HALT
17 Command CONFIG, SUCC1.CMD(3-0) = 0001 HALT DEFAULT_CONFIG
26.2.6.2 DEFAULT_CONFIG State
In DEFAULT_CONFIG state, the communication controller is stopped. All configuration registers are
accessible and the pins to the physical layer are in their inactive state.
The communication controller enters this state:
• When leaving hardware reset
• When exiting from HALT state
To leave DEFAULT_CONFIG state the host has to write SUCC1.CMD(3-0) = 0001. The communication
controller then transits to CONFIG state.
26.2.6.3 CONFIG State
In CONFIG state, the communication controller is stopped. All configuration registers are accessible and
the pins to the physical layer are in their inactive state. This state is used to initialize the communication
controller configuration.
The communication controller enters this state:
• When exiting from DEFAULT_CONFIG state
• When exiting from MONITOR_MODE or READY state
When the state has been entered by HALT and DEFAULT_CONFIG state, the host can analyze status
information and configuration. Before leaving CONFIG state the host has to assure that the configuration
is fault-free.