TLE7263E Datasheet, PDF (11/63 Pages) Infineon Technologies AG – Integrated HS-CAN, LIN, LDO and HS Switch System Basis Chip

TLE 7263E
Features
4.2
SBC Sleep Mode without Cyclic Sense
In order to reduce the current consumption to a minimum, the SBC offers a Sleep Mode
without Cyclic Sense (see Figure 4). This mode is entered via SPI command, and turns-
off the integrated bus transceivers and respective termination, main voltage regulator as
well as the High-Side switch. Upon a voltage level change at the monitoring/wake-up
pins or by a CAN or LIN message the SBC Sleep Mode will be terminated and the SBC
Standby Mode will automatically be entered.
SBC Active Mode
MS2 MS1 MS0 Vcc1
0 0 / 1 0 / 1 ON
SBC Standby Mode
Vcc1
ON
Start Up
Power Up
µController SPI-Command:
- disable „cyclic sense function“ via SPI Timing Bits
- select SBC Sleep Mode via SPI Mode Bits
- window watchdog activation / deactivation via SPI
[can remain active as periodic reset timer]
Initialization of
MONx inputs ¹⁾
transition caused by:
- event at MONx inputs
- CAN message
- LIN message
[SPI indicates source]
SBC Sleep Mode
MS2 MS1 MS0 Vcc1
1
0
0 OFF
HS-Switch = OFF
1) _{if initialization fails, device is}
switched into SBC Standby mode
sleep_TLE7263
Figure 4 State Diagram “SBC Sleep Mode without Cyclic Sense”
Note: To switch into Low Power Mode from Standby Mode the device should be
switched into Normal Mode first. This is required to reset the CAN and LIN
transceiver to ensure correct wakeup as well as to ensure the correct function of
the RO pin when going to Sleep Mode. The time the device is in Normal Mode
before going to Low Power Mode should be long enough that the Vcc2 is up. This
can be released by a wait time or by reading the status of Vcc2 via SPI (bit13).
Data Sheet
11
Rev. 1.51, 2007-06-22