
Data Sheet
44
Rev. 1.00
2017-07-31
TLE9262-3BQX
5.4.2.1
Activation of SWK
Below figure shows the principal of the SWK activation.
Figure 12 Flow for activation of SWK
CAN_x
Enable CAN
Enabling CAN (not OFF) enables also
the selective wake block. Block gets
synchronous to the CAN bus.
If one CAN Frame is received the bit
SYNC = 1 is set
Set SWK wake data. e.g.
ID, ID_Mask, DATA
Set
CFG_VAL = 1
Bit set to confirm by the microcontroller
that valid data are programmed.
Setting the data can also be done as
first task
SYNC = 1
SBC Normal Mode
SW not enabled
CAN OFF
SYSERR
1
0
SWK not enabled
In case SWK not enabled:
CAN Normal with SW -> CAN Normal
CAN Rx Only with SW -> CAN Rx Only
CAN Wakable with SW -> CAN Wakable
SBC Sleep Mode
SBC Stop Mode
INT generation
stays in SBC Stop Mode
MODE = 10
To ensure that no wake-up event
has taken place in meantime
In case of WUF detection:
CAN_WU = 1; WUF = 1;
CFG_VAL = 0; SWK_SET = 0
Handle wake
event
(incl. CAN
mode toggling)
Clear
SYSERR
Enable a CAN
Mode with SWK
via CAN_x Bits
CAN Mode must be toggled before
(re-)enabling wake capable mode
Clear
WK_STAT
To avoid invalid configuration
Check SWK_STAT
Check & Clear
WK_STAT
To activate Selective Wake
Selective Wake is now enabled
(INT is generated in case of WUF)
Notes:
- Tsilence handling not shown in drawing
- SYNC will only be set once CAN is „rearmed“ and
at least one CAN frame was sent successfully
SWK_SET = 1, WUP & WUF = 0,
SYNC = 1
Select SBC
low-power mode
via MODE Bits
MODE = 01
Wake-up: VCC1 Power-up
change to SBC Normal Mode
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