TLE82612EXT Infineon Technologies, TLE82612EXT Datasheet - Page 57

• Manufacturer Part Number: TLE82612EXT
• Manufacturer: Infineon Technologies

Specifications of TLE82612EXT

• Operating Supply Voltage (typ): 9/12/15/18/24/28V
• Operating Supply Voltage (min): 5.5V
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 36
• Lead Free Status / RoHS Status: Supplier Unconfirmed

12.3
The reason to activate the Limp Home pins and the consequences are listed in
Table 10
SBC Mode
INIT Mode
Normal Mode
Stop Mode
Sleep Mode
Restart Mode
Fail-Safe Mode
SW Flash Mode
Table 11
SBC Mode
INIT Mode
Normal Mode
Restart Mode
Any mode
12.4
When Limp Home is activated via SPI command, then it is released via SPI command. This is useful for diagnosis
purpose for example.
Otherwise, the Limp Home outputs are released only in SBC Normal Mode with the following conditions: After the
device has been set to SBC Restart Mode, automatically entering SBC Normal Mode, a successful Watchdog
trigger must be sent via SPI. At this point, the Limp Home outputs remain active. Then the microcontroller needs
to send by SPI command the deactivation of the Limp Home.
12.5
A
1) the
2)
3) the condition is valid longer then the
A
(for
Figure 30
Data Sheet
V
V
V
cc1µC
cc1µC
V
S
s
is higher then the threshold (
V
>
cc1µC
undervoltage time-out condition is given, when
undervoltage time-out will sent the device into Fail-Safe Mode. Limp Home output stag will be activated
V
LHUV
gives an example of the Limp Home output activation, due to a
Activation of the Limp Home Output
Limp Home, Function of the SBC Mode
Automatic Activation of Limp Home Output
Release of the Limp Home Output
V
output voltage is below the reset threshold (
cc1µC
)
Limp Home Outputs
OFF
OFF
Unchanged
Unchanged
Unchanged
ON
Unchanged
undervoltage time-out
Reason
INIT time-out (t
1st Watchdog failure (config 1/2)
2nd Watchdog failure (config 3/4)
Reset output permanent short circuit to V
Reset output permanent short circuit to GND
V
If previously turned ON in SBC Normal Mode, via SPI command
V
cc1µC
cc1µC
ON via SPI
V
undervoltage time-out
thermal shutdown
SthUV1
V
cc1µC
,
V
INITTO
SthUV2
under voltage time-out (
)
,
V
SthUV3
57
V
) and
RT1
,
V
ON if it was ON until the successful Watchdog
setting and deactivation via SPI.
RT2
,
V
RT3
t
cc1µC
Vcc1UVTO
),
V
cc1µC
).
Table 10
undervoltage time-out.
and
Rev. 1.0, 2009-05-26
Table
TLE8261-2E
Limp Home
11.