User Manual
922
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
High-Voltage Monitor Input
25.2.2
Functional Description
For a wake-up on a positive voltage transition, the
MONx_RISE
bit has to be configured. For a wake-up on a
negative voltage transition, the corresponding bit
MONx_FALL
has to be set. This configuration can also be
used for an edge detection in active mode.
As the system provides the functionality of cyclic sense, the MONx can be configured as a wake-up source for
this mode. This is done by setting the bit
MONx_CYC
.
The MONx also includes an input circuit with pull-up (can be activated by
MONx_PU
bit) and pull-down (can
be activated by
MONx_PD
Bit) current sources to define a certain voltage level with open inputs and a filter
function to avoid wake-up events caused by unwanted voltage transients at the module input.
When automatic current source selection is enabled, a voltage level at the MONx input of V
MON_th
< V
MONx
< V
s
-
1V activates the pull-up current source. If the MONx voltage is between 1 V < V
MONx
< V
MON_th
the pull-down sink
is activated, providing stable levels at the monitor inputs. Below and above these voltage ranges the current
is minimized to a leakage current. This automatic activation of the current sources, has to be done by setting
MONx_PU
and
MONx_PD
bit to one at the same time.
Note:
In case a Monitoring Input is deactivated by setting bit MONx_EN to zero, it can neither be
used as a wake-up source nor can it be used to detect logic levels!
Figure 213 Module - HV_MON Input Characteristics for switchable pull current and static pull-down (on
top) or pull-up
I
MON
V
MON
V
MONth_min
V
MONth_max
Pull-down
current
Pull-up
current
MONx_Currents
V
S - 1V
V
S
1V