![Infineon Technologies TC1784 Скачать руководство пользователя страница 1584](http://html.mh-extra.com/html/infineon-technologies/tc1784/tc1784_user-manual_20554461584.webp)
TC1784
FlexRay™ Protocol Controller (E-Ray)
User´s Manual
20-208
V1.1, 2011-05
E-Ray, V3.13
The “WAKEUP_LISTEN” state is controlled by the wakeup timer and the wakeup noise
timer. The two timers are controlled by the parameters listen time-out
and
listen time-out noise
. Both values can be configured in the SUC
Configuration Register 2. listen time-out enables a fast cluster wakeup in case of a noise
free environment, while listen time-out noise enables wakeup under more difficult
conditions regarding noise interference.
In “WAKEUP_SEND” state the Communication Controller transmits the wakeup pattern
on the configured channel and checks for collisions. After return from wakeup the Host
has to bring the Communication Controller into “STARTUP” state by CHI command
RUN.
In “WAKEUP_DETECT” state the Communication Controller attempts to identify the
reason for the wakeup collision detected in “WAKEUP_SEND” state. The monitoring is
bounded by the expiration of listen time-out as configured by
.
in the SUC
Configuration Register 2. Either the detection of a wakeup pattern indicating a wakeup
attempt by another node or the reception of a Frame Header indication existing
communication, causes the direct transition to “READY” state. Otherwise
WAKEUP_DETECT is left after expiration of listen time-out; in this case the reason for
wakeup collision is unknown.
The Host has to be aware of possible failures of the wakeup and act accordingly. It is
advisable to delay any potential startup attempt of the node having instigated the wakeup
by the minimal time it takes another coldstart node to become awake and to be
configured.
The FlexRay™ Protocol Specification v2.1 recommends that two different
Communication Controllers shall awake the two channels.
5
Collision detected
WAKEUP_
SEND
WAKEUP_
DETECT
6
Wakeup timer expired OR WUP detected on
wakeup channel selected by flag
the SUC Configuration Register 1 OR Frame
Header received on either available channel
WAKEUP_
DETECT
WAKEUP_
STANDBY
exit
Wakeup completed (after T2 or T4 or T6) OR Host
commands change to “READY” state by writing
.
= 0010
B
(READY command). This
command also resets the wakeup FSM to
“WAKEUP_STANDBY” state
WAKEUP
READY
Table 20-12 State Transitions WAKEUP
(cont’d)
T#
Condition
From
To
Содержание TC1784
Страница 1: ...User s Manual V1 1 2011 05 Microcontrollers TC1784 32 Bit Single Chip Microcontroller ...
Страница 3: ...User s Manual V1 1 2011 05 Microcontrollers TC1784 32 Bit Single Chip Microcontroller ...
Страница 950: ...TC1784 Direct Memory Access Controller DMA User s Manual 11 132 V1 1 2011 05 DMA V3 03 ...
Страница 1949: ...TC1784 General Purpose Timer Array GPTA v5 User s Manual 21 297 V1 1 2011 05 GPTA v5 V1 14 ...
Страница 2350: ...w w w i n f i n e o n c o m Published by Infineon Technologies AG Doc_Number ...