tle8261-2e Infineon Technologies Corporation, tle8261-2e Datasheet - Page 55
tle8261-2e
Manufacturer Part Number
tle8261-2e
Description
Universal System Basis Chip Hermes
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TLE8261-2E.pdf
(83 pages)
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12
12.1
The Limp Home outputs are a very useful way to control safety critical functions independent of the microcontroller,
such as turning on or off critical load during a microcontroller failure.
12.2
The Limp Home output is an active LOW open drain transistor, please refer to
to connect at least an external pull-up resistor at.
The Limp Home output is activated due to a failure condition or via SPI, see
the Limp Home cannot be activated and remains as a high impedance.
Figure 27
12.2.1
The LH_SI output is similar to the Limp Home output. The output is pulsed to
to provide the side indicators frequency. The LH_SI function is active when the Limp Home is active.
Figure 28
12.2.2
The LH_PL/Test pin is an output pin shared with the Test pin function. During SBC Init Mode, the pin is used as
an input, in all other modes, the pin is an output.
The output is pulsed to
the 27W stop lights into an 5W rear light. Refer to
is active. In SBC Init Mode, the LH_PL is inhibited, to avoid a wrong set of the SBC into SBC Software development
Mode.
Data Sheet
Limp Home
Description
Limp Home output
Limp Home block diagram
Limp Home side indicators output
Limp Home LH_SI block diagram
LH_PL (Pulsed Light) output
f
LHPL
Limp home logic
frequency with a duty cycle of
Limp home logic
Figure
55
29. The LH_PL function is activated when the Limp Home
d
PL
(20% LOW, 80% high impedance), designed to dim
LIMP HOME_LHSI.VSD
LIMP HOME.VSD
f
LHSI
Figure
Limp home
Chapter
Limp home
LH_SI
frequency with
27; therefore, it is necessary
12.3. If
Rev. 1.0, 2009-05-26
V
s
d
SI
TLE8261-2E
is below
and designed
Limp Home
V
LHUV
,
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