Data Sheet
95
Rev. 1.00
2017-07-31
TLE9263BQXV33
Wake and Voltage Monitoring Inputs
12.2.2
Alternate Measurement Function with WK1 and WK2
12.2.2.1 Block Description
This function provides the possibility to measure a voltage, e.g. the unbuffered battery voltage, with the
protected WK1 HV-input. The measured voltage is routed out at WK2. It allows for example a voltage
compensation for LED lighting by changing the duty cycle of the High-Side outputs. A simple voltage divider
needs to be placed externally to provide the correct voltage level to the microcontroller A/D converter input.
The function is available in SBC Normal Mode and it is disabled in all other modes to allow a low-quiescent
current operation.The measurement function can be used instead of the WK1 and WK2 wake and level
signalling capability.
The benefits of the function is that the signal is measured by a HV-input pin and that there is no current flowing
through the resistor divider during low-power modes.
The functionality is shown in a simplified application diagram in
Figure 60
.
12.2.2.2 Functional Description
This measurement function is by default disabled. In this case, WK1 and WK2 have the regular wake and
voltage level signalization functionality. The switch S1 is open for this configuration (see
Figure 60
).
The measurement function can be enabled via the SPI bit
WK_MEAS
.
If
WK_MEAS
is set to ‘1’, then the measurement function is enabled and switch S1 is closed in SBC Normal
Mode. S1 is open in all other SBC modes. If this function the pull-up and down currents of WK1 and WK2 are
disabled, and the internal WK1 and WK2 signals are gated. In addition, the settings for WK1 and WK2 in the
registers
WK_PUPD_CTRL
,
WK_FLT_CTRL
and
WK_CTRL_2
are ignored but changing these setting is not
prevented. The registers
WK_STAT_1
and
WK_LVL_STAT
are not updated with respect to the inputs WK1 and
WK2.
However, if only WK1 or WK2 are set as wake sources and a SBC Sleep Mode command is set, then the
SPI_FAIL
flag will be set and the SBC will be changed into SBC Restart Mode (see
Chapter 5.1
also for wake capability
of WK1 and WK2).
Table 22 Differences between Normal WK Function and Measurement Function
Affected Settings/Modules for
WK1 and WK2 Inputs
WK_MEAS
= 0
WK_MEAS
= 1
S1 configuration
‘open’
‘closed’ in SBC Normal Mode,
‘open’ in all other SBC Modes
Internal WK1 & WK2 signal
processing
Default wake and level signaling
function,
WK_STAT_1
,
WK_STAT_2
are updated accordingly
‘WK1...2 inputs are gated internally,
WK_STAT_1
,
WK_STAT_2
are not
updated
WK1_EN
,
WK2_EN
Wake-up via WK1 and WK2 possible if
bits are set
setting the bits is ignored and not
prevented. If only
WK1_EN
,
WK2_EN
are set while trying to go to SBC Sleep
Mode, then the
SPI_FAIL
flag will be
set and the SBC will be changed into
SBC Restart Mode.
WK_PUPD_CTRL
normal configuration is possible
no pull-up or pull-down enabled
WK_FLT_CTRL
normal configuration is possible
setting the bits is ignored and not
prevented
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
