TLE9261-3QX Datasheet, PDF (41/186 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

TLE9261-3QX
5.4.2.1 Activation of SWK
Below figure shows the principal of the SWK activation.
SBC Normal Mode
SW not enabled
CAN OFF
CAN_x
Enable CAN
SYNC = 1
Set SWK wake data. e.g.
ID, ID_Mask, DATA
Clear
WK_STAT
Set
CFG_VAL = 1
Clear
SYSERR
Handle wake
event
(incl. CAN
mode toggling)
SYSERR
1
0
Enable a CAN
Mode with SWK
via CAN_x Bits
Check SWK_STAT
SWK not enabled
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
Setting the data can also be done as
first task
To avoid invalid configuration
Bit set to confirm by the microcontroller
that valid data are programmed.
To activate Selective Wake
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
Selective Wake is now enabled
(INT is generated in case of WUF)
CAN Mode must be toggled before
(re-)enabling wake capable mode
SWK_SET = 1, WUP & WUF = 0,
SYNC = 1
Check & Clear
WK_STAT
To ensure that no wake-up event
has taken place in meantime
Select SBC
low-power mode
via MODE Bits
MODE = 10
MODE = 01
SBC Sleep Mode
Wake-up: VCC1 Power-up
change to SBC Normal Mode
SBC Stop Mode
In case of WUF detection:
CAN_WU = 1; WUF = 1;
CFG_VAL = 0; SWK_SET = 0
INT generation
stays in SBC Stop Mode
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
Figure 12 Flow for activation of SWK
Data Sheet
41
Rev. 1.1, 2014-09-26