Data Sheet
115
Rev. 1.00
2017-07-31
TLE9262BQXV33
Supervision Functions
15.4
Undervoltage VS and VSHS
If the supply voltage VS reaches the undervoltage threshold
V
S,UV
then the SBC does the following measures:
•
SPI bit
VS_UV
is set. No other error bits are set. The bit can be cleared once the condition is not present
anymore,
•
VCC3 is disabled (see
Chapter 8.2
) unless the control bit
VCC3_VS_ UV_OFF
is set
• The VCC1 short circuit protection becomes inactive (see
Chapter 15.7
). However, the thermal protection
of the device remains active.
If the undervoltage threshold is exceeded (VS rising) then functions will be automatically enabled again.
If the supply voltage VSHS passes below the undervoltage threshold (
V
SHS,UVD
) the SBC does the following
measures:
•
HS1...4 are acting accordingly to the SPI setting (see
Chapter 9
)
•
LINx: Transmitter and Receiver are disabled during the VSHS undervoltage condition (see
Chapter 11.2.7
);
• SPI bit
VSHS_UV
is set. No other error bits are set. The bit can be cleared once the condition is not present
anymore,
•
VCC1, VCC2, WKx and CAN are not affected by VSHS undervoltage
15.5
Overvoltage VSHS
If the supply voltage VSHS reaches the overvoltage threshold (
V
SHS,OVD
) the SBC triggers the following
measures:
•
HS1...4 are acting accordingly to the SPI setting (see
Chapter 9
)
•
SPI bit
VSHS_OV
is set. No other error bits are set. The bit can be cleared once the condition is not present
anymore,
•
VCC1, VCC2, VCC3, WKx, LIN and CAN are not affected by VS overvoltage
15.6
VCC1 Over-/ Undervoltage and Undervoltage Prewarning
15.6.1
VCC1 Undervoltage and Undervoltage Prewarning
A first-level voltage detection threshold is implemented as a prewarning for the microcontroller. The
prewarning event is signaled with the bit
VCC1_ WARN
. No other actions are taken.
As described in
Chapter 15.1
and
Figure 52
, a reset will be triggered (RO pulled ‘low’) when the
V
CC1
output
voltage falls below the selected undervoltage threshold (V
RTx
). The bit
VCC1_UV
is set and the SBC will enter
SBC Restart Mode.
Note:
The
VCC1_ WARN
or
VCC1_UV
bits are not set in Sleep Mode as V
CC1
= 0V in this case
