TLE8263-2E Datasheet, PDF(15/94 Page) Infineon Technologies AG

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TLE8263-2E Datasheet, PDF (15/94 Pages) Infineon Technologies AG – Universal System Basis Chip

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TLE8263-2E

Confidential

State Machine

4.2.9 SBC Fail-Safe Mode

In SBC Fail-Safe Mode, all voltage regulators are OFF and the transceivers are in Wake-Capable Mode. The Limp

Home output is active.

Conditions to enter the SBC Fail-Safe Mode are:

â¢ Watchdog trigger failure in configuration 2 or 4

â¢ Vcc1ÂµC undervoltage time-out in any configuration if VS is above VLHUV range.

â¢ Temperature shutdown of Vcc1ÂµC in any configuration.

â¢ Reset clamped in Config. 2/4

In case of Vcc1ÂµC overtemperature shutdown, the SBC will latch and wait to cool down below the thermal hysteresis,

and will go back to SBC Restart Mode.

In case of a wake-up event, the SBC will go to SBC Restart Mode (not in case of Vcc1ÂµC overtemperature

shutdown), storing the wake-up event and resetting the Watchdog trigger failure counter. The first SPI output data

when going to SBC Normal Mode will always indicate the reason for the SBC Fail-Safe Mode.

4.2.10 SBC Software Development Mode

If the Test pin is connected to GND (Config 0 active) during powering-up, the SBC enters SBC Software

Development Mode. SBC Software Development Mode is a super set of the other modes so it is possible to use

all the modes of the SBC with the following difference. In SBC Software Development Mode, no reset is generated

and VCC1ÂµC is not switched off due to Watchdog trigger failure. If a Watchdog trigger failure occurs, it will be

indicated by the INT output (reset bit). The SBC Fail-Safe Mode or SBC Restart Mode are not reached in case of

wrong Watchdog trigger but the other reasons to enter these modes are still valid.

4.2.11 SBC Factory Flash Mode

In this mode, the SBC is completely powered OFF and the microcontroller is supplied externally. The mode is

detected when VCC1ÂµC is powered from external and the voltage on Vs is not powered from external. The current

flow out of Vs must be limited to the maximum rating. The external supply voltage should be below the absolute

maximum rating stated in Chapter 5.1. The reset can be driven by an external circuit, or pulled high with a pull-up

resistor.

Note: Please respect the absolute maximum ratings when the device is in SBC Factory Flash Mode.

Data Sheet

Rev. 1.0, 2009-03-31

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