KMA215 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet Rev. 1 — 24 February 2014 17 of 50
NXP Semiconductors
KMA215
Programmable angle sensor with SAE J2716 SENT
7.4 Out of range detection
The KMA215 can be programmed to raise a diagnostic condition if the angular data value
exceeds a programmable data range. If the angular data is above the
OOR_THRESHOLD_HI value, the OOR_HI bit of command register is set. If the angular
data is below the OOR_THRESHOLD_LO value, the OOR_LO bit of command register is
set. These bits are reset if the signal is back in the programmed range.
7.5 Prewarning indication
Bit #1 of the STATUS nibble is a prewarning indication. While the KMA215 is still in normal
operation, this bit is set if one of the following conditions occurs:
• The angular data is above the OOR_THRESHOLD_HI value thus the OOR_HI bit is
set
• The angular data is below the OOR_THRESHOLD_LO value thus the OOR_LO bit is
set
• Optional: A single bit error of the non-volatile memory was corrected and the
ERR_CORRECT bit is set. The indication of the single-bit error via prewarning
indication in the SENT message can be disabled in the command register
7.6 Low voltage detection and overvoltage protection
If the supply voltage is below the switch-off threshold voltage V
th(off)
or above the
overvoltage threshold V
th(ov)
voltage, the output is set to LOW. Table 19 describes the
system behavior depending on the voltage range of the supply voltage.
Table 20 describes the diagnostic behavior and the resulting error flag in the command
register depending on the error case. Furthermore the duration and termination condition
to enter and leave the diagnostic condition are given, respectively.
Table 19. System behavior
Supply voltage State Description
0V to 1.8 V start-up power high-ohmic output stage; external pull-up resistor defines
output voltage
1.8 V to V
POR
power-on
reset
The output buffer drives an active LOW. During the reset
phase, all circuits are in reset and/or Power-down mode.
V
POR
to V
th(on)
or
V
th(off)
initialization The digital core and the oscillator are active. After reset, the
content of the non-volatile memory is copied into the shadow
registers. The output buffer drives an active LOW.
V
th(on)
or V
th(off)
to
minimum V
DD
functional
operation
All analog circuits are active and the output is set to HIGH for
at least 100 s before SENT transmission starts. Not all
parameters are within the specified limits.
Minimum V
DD
to
maximum V
DD
normal
operation
All analog circuits are active and the measured angle is
available at the digital output. All parameters are within the
specified limits.
Maximum V
DD
to
V
th(ov)
functional
operation
All analog circuits are active and the measured angle is
available at the digital output. Not all parameters are within the
specified limits.
V
th(ov)
to 16 V overvoltage The digital core and the oscillator are active but all other
circuits are in Power-down mode. The output buffer drives an
active LOW.
