TLE9260-3QX Datasheet, PDF (49/175 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

TLE9260-3QX
5.4.4.3 SBC Sleep Mode with SWK
In SBC Sleep Mode the CAN Transceiver can be switched into the following CAN Modes
• CAN OFF
• CAN WK Mode (without SWK)
• CAN SWK Mode
To enable “CAN SWK Mode” the CAN has to be switched to “CAN Normal Mode with SWK”, “CAN Receive Only
Mode with SWK” or to “CAN SWK Mode” in SBC Normal Mode before sending the device to SBC Sleep Mode.
The table shows the change of CAN mode when switching from SBC Normal Mode to Sleep Mode.
A wake from Sleep Mode with Selective Wake (Valid WUF) leads to Restart Mode. In Restart Mode the CFG_VAL
bit will be cleared by the SBC, the SYSERR bit is not set. In the register CAN_x the programmed CAN SWK Mode
(101) can be read.
To enable the CAN SWK Mode again and to enter SBC Sleep Mode the following sequence can be used; Program
a CAN Mode different from CAN SWK Mode (101, 110, 111), set the CFG_VAL, CLEAR SYSERR bit, Set CAN_x
bits to CAN SWK Mode (101), switch SBC to Sleep Mode.
To enable the CAN WK Mode or CAN SWK Mode again after a wake on CAN a rearming is required for the CAN
transceiver to be wake capable again. The rearming is done by programming the CAN into a different mode with
the CAN_x bit and back into the CAN WK Mode or CAN SWK Mode. To avoid lock-up when switching the SBC
into Sleep Mode with an already woken CAN transceiver, the SBC does an automatic rearming of the CAN
transceiver when switching into Sleep Mode. So after switching into Sleep Mode the CAN transceiver is either in
CAN SWK Mode or CAN WK Mode depending on CAN_x setting and SYSERR bit (If CAN is switched to OFF
Mode it is also OFF in Sleep Mode)
Table 11 CAN Modes change when switching to SBC Sleep Mode
Programmed CAN Mode in SBC
Normal Mode
CAN_x SYSERR CAN Mode in SBC Sleep Mode
bits
bit
CAN OFF
000
0
CAN OFF
CAN WK Mode (no SWK)
001
0
CAN WK Mode (no SWK)
CAN Receive Only (no SWK)
010
0
CAN WK Mode (no SWK)
CAN Normal Mode (no SWK)
011
0
CAN WK Mode (no SWK)
CAN OFF
100
0
CAN OFF
CAN SWK Mode
101
0
CAN SWK Mode
CAN SWK Mode
101
1
CAN WK Mode (no SWK)
CAN Receive Only with SWK
110
0
CAN SWK Mode
CAN Receive Only with SWK
110
1
CAN WK Mode (no SWK)
CAN Normal Mode with SWK
111
0
CAN SWK Mode
CAN Normal Mode with SWK
111
1
CAN WK Mode (no SWK)
CAN_x
bits
000
001
001
001
100
101
101
101
101
101
101
Data Sheet
49
Rev. 1.1, 2014-09-26