KMA215
Programmable angle sensor with SAE J2716 SENT
Rev. 1 — 24 February 2014
Product data sheet
1. Product profile
1.1 General description
The KMA215 is a magnetic angle sensor module with digital output in accordance with
SAE J2716 JAN2010 Single Edge Nibble Transmission (SENT). The MagnetoResistive
(MR) sensor bridges, the mixed signal Integrated Circuit (IC) and the required capacitors
are integrated into a single package.
This angular measurement module KMA215 is pre-programmed, pre-calibrated and
therefore, ready to use. The default configuration for the digital output is
SENT2010-03.0us-6dn-npp-nsp-A.3.
The KMA215 allows user-specific adjustments of angular range, zero angle and SENT
configuration. The settings are stored in a multi-time programmable non-volatile memory.
1.2 Features and benefits
High precision sensor for magnetic
High temperature range up to 160 C
angular measurement
Single package sensor module with
Overvoltage protection up to 16 V
integrated filters and pulse shaping for
improved ElectroMagnetic Compatibility
(EMC)
Automotive qualified in accordance with Push pull output stage compliant with
AEC-Q100 Rev-G
SAE J2716 JAN2010 SENT with pulse
shaping
Programmable user adjustments,
Optional high-speed 12-bit SENT
angular range, zero angle and SENT
message format H.3
configuration
Fail-safe non-volatile memory with write Optional enhanced serial data
protection using lock bit
communication
Independent from magnetic field
Programming via One-Wire Interface
strength above 35 kA/m
(OWI)
Ready to use without external
8 user-programmable SENT messages
components
(8 12 bit)
Factory calibrated
Magnet-loss and broken bond wire
detection
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
1.2.1 Extract of SENT modes (shorthand notation)
SENT2010-03.0us-6dn-npp-nsp-A.3 (default configuration)
SENT2010-03.0us-6dn-npp-esp-A.3
SENT2010-03.0us-6dn-ppc(297.0)-nsp-A.3
SENT2010-03.0us-6dn-ppc(297.0)-esp-A.3
SENT2010-06.0us-6dn-npp-nsp-A.3
SENT2010-06.0us-6dn-npp-esp-A.3
SENT2010-06.0us-6dn-ppc(297.0)-nsp-A.3
SENT2010-06.0us-6dn-ppc(297.0)-esp-A.3
SENT201x-03.0us-4dn-npp-nsp-H.3
SENT201x-03.0us-4dn-npp-esp-H.3
Additional SENT modes can be found in Table 8, Table 12 and Table 15.
2. Pinning information
Table 1.
Pin
Pinning
Symbol
Description
1
VDD
supply voltage
2
GND
ground
3
OUT/DATA
SENT output or OWI data interface
Simplified outline
3. Ordering information
Table 2.
Ordering information
Type number
KMA215
KMA215
Product data sheet
Package
Name
Description
Version
-
plastic single-ended multi-chip package;
6 interconnections; 3 in-line leads
SOT1288-2
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Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
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4. Functional diagram
KMA215
Product data sheet
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Functional diagram of KMA215
KMA215
3 of 50
© NXP B.V. 2014. All rights reserved.
Fig 1.
Programmable angle sensor with SAE J2716 SENT
Rev. 1 — 24 February 2014
All information provided in this document is subject to legal disclaimers.
&EORFN
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
5. Functional description
The KMA215 amplifies two orthogonal differential signals from MR sensor bridges and
converts them into the digital domain. The angle is calculated using the COordinate
Rotation DIgital Computer (CORDIC) algorithm and transmitted in a SENT frame
compliant to SAE J2716 SENT standard. Zero angle and angular range are
programmable. In addition, eight 12-bit Original Equipment Manufacturer (OEM) registers
are available for customer purposes, such as sample identification.
The KMA215 comprises a Cyclic Redundancy Check (CRC) and an Error Detection and
Correction (EDC) for the non-volatile memory. It also has magnet-loss and broken bond
wire detection.
After multiplexing the two MR Wheatstone bridge signals and their successive
amplification, the signal is converted into the digital domain by an Analog-to-Digital
Converter (ADC). Further processing is done within an on-chip state machine. This state
machine controls offset cancelation, calculation of the mechanical angle using the
CORDIC algorithm, as well as zero angle and angular range adjustment. The SENT
protocol generator converts the angular information into SENT messages that are
repeatedly sent via the SENT output.
The configuration parameters are stored in a user-programmable non-volatile memory.
The OWI (accessible using pin OUT/DATA) is used for accessing the memory. In order to
protect the memory content, a lock bit can be set. After locking the non-volatile memory,
its content cannot be changed anymore.
5.1 Angular measurement directions
The differential signals of the MR sensor bridges depend only on the direction of the
external magnetic field strength Hext, which is applied parallel to the plane of the sensor.
In order to obtain a correct output signal, exceed the minimum saturation field strength.
KMA215
Product data sheet
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Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
4 of 50
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
α
Hext
001aan665
Fig 2.
Angular measurement directions
Since the Anisotropic MR (AMR) effect is periodic over 180, the sensor output is also
180-periodic. The angle is calculated relative to a freely programmable zero angle.
The dashed line indicates the mechanical zero degree position.
6. Digital output
The KMA215 SENT provides a digital output signal on pin OUT/DATA compliant with the
SAE J2716 JAN2010 SENT. The measured angle is converted linearly into a value,
which is digital encoded in SENT frames. Either a positive or a negative angular slope
characteristic is provided for this purpose.
Table 3 describes the digital output behavior for a positive slope. A magnetic field angle
above the programmed maximum angle max but below the clamp switch angle sw(CL)
sets the output to the upper clamping value. If the magnetic field angle is larger than the
clamp switch angle, the output value switches from upper to lower clamping value. If there
is a negative slope, the clamping levels are changed.
Table 3.
KMA215
Product data sheet
Digital output behavior for a positive slope
Magnetic field angle
Data value
max < < sw(CL)
CLAMP_HI
sw(CL) < < ref + 180
CLAMP_LO
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Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
5 of 50
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
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max = ref + rng
Fig 3.
Characteristic of the digital output
6.1 Transmission of sensor messages
The KMA215 repeatedly sends a sequence of pulses based on the encoding scheme of
SENT. The transmitted message is a sequence of 4-bit nibbles (SENT frame). The time
base of the SENT frame is defined in clock ticks with a configurable duration of
Tclk = 3.0 s, 4.5 s, 6.0 s, 12.0 s and 24.0 s each clock tick. A calibration pulse
followed by a STATUS nibble, a constant number of DATA nibbles and a CRC nibble as
shown in Figure 4 define one message frame of a SENT transmission. The KMA215
supports the SENT data formats in accordance with the appendix A.1 and A.3 of the
SAE J2716 JAN2010 SENT. Additionally a high-speed 12-bit message format H.3 is
implemented.
General SENT specification can be found in:
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• SAE J2716 FEB2008 SENT
• SAE J2716 JAN2010 SENT
DDD
Fig 4.
KMA215
Product data sheet
SENT frame
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Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
6 of 50
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
6.1.1 SYNC nibble
The synchronization and calibration nibble is always 56 clock ticks long. The receiver
uses the SYNC nibble to derive the clock tick time from the SENT frame.
6.1.2 STATUS nibble
The STATUS nibble contains status and slow channel information of the KMA215. Bit #0
reflects the operating mode of the KMA215, normal or diagnostic mode.
Bit #1 depends on the selected data format. If there is single secure sensor format A.3 or
high-speed 12-bit message format H.3 selected, bit #1 of the STATUS nibble is a
prewarning indication. Prewarning bit is set while the KMA215 is still in normal mode, but
one of the following conditions occurred:
• Angular value is above the programmed OOR_HI threshold; see Table 32
• Angular value is below the programmed OOR_LO threshold; see Table 32
• Corrected single bit error of the non-volatile memory (can be disabled via
SINGLE_BIT_ERROR_PREWARNING bit in register Dh); see Table 33
If there is dual throttle position sensor format A.1 selected bit #1 behaves the same as
bit #0. For detailed diagnostic information read out the ERROR_BYTE of the optional slow
channel serial message.
Bit #2 and bit #3 are used for optional slow channel serial data messages, described in
Section 6.1.6.
Table 4.
STATUS nibble
Bit
Description
3 (MSB)
serial data message bit
2
serial data message bit
1
prewarning[1]
0 (LSB)
bit = 0: normal mode[2]
bit = 1: diagnostic condition[2][3]
[1]
The function of this bit depends on the selected data frame format. If there is A.1 selected this bit behaves
like bit #0 of the STATUS nibble. If there is A.3 or H.3 selected this bit is an OR function of OOR_HI,
OOR_LO and if enabled also ERROR_CORRECT bit is included in the OR function.
[2]
Copy of IN_DIAG_MODE bit of command register.
[3]
Enable the serial data communication for detailed diagnostic information
6.1.3 CRC nibble
The CRC nibble contains the 4-bit checksum of the DATA nibbles only. The CRC
calculation does not cover the STATUS nibble.
The CRC is calculated using polynominal x4 + x3 + x2 + 1 with seed value of 0101.
The KMA215 supports both the legacy CRC defined in SENT SAE J2716 FEB2008 and
earlier revisions and the recommended CRC defined in SENT SAE J2716 JAN2010.
The CRC version can be selected via SENT_LEGACY_CRC bit in the SENT_CONF
register; see Table 33. CRC in accordance with SAE J2710 JAN2010 is the default
configuration.
KMA215
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
7 of 50
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
6.1.4 PAUSE pulse
A PAUSE pulse can be optionally attended to the SENT frame to generate messages with
a constant frame length of 297.0 clock ticks.
6.1.5 DATA nibbles
In general, the DATA nibbles contain the angular information of the KMA215. The data
format depends on the selected sensor type. The KMA215 supports three different DATA
nibble formats as defined in the SAE J2716 SENT specification:
• Single secure sensor format A.3
• Dual throttle position sensor format A.1
• High-speed 12-bit message format H.3
A detailed frame format description can be found in the corresponding subsection.
6.1.5.1
Single secure sensor format A.3
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The KMA215 transmits the sequence defined in Table 5 repeatedly in accordance with the
single secure sensor format defined in SAE J2716 JAN2010 SENT appendix A.3. DATA
nibbles D0 to D2 contain the 12-bit angular value. D3 and D4 reflect the value of an 8-bit
loop counter. D5 is an inverted copy of the most significant nibble DATA0.
DDD
Fig 5.
Table 5.
SYNC
-
Single secure sensor format A.3
Data content of single secure sensor format A.3 frame
STATUS
DATA0
error flag
D0[1]
DATA1
DATA2
DATA3
DATA4
D1
D2[2]
D3[1]
D4[2]
12-bit angular value
[1]
Most Significant Nibble (MSN).
[2]
Least Significant Nibble (LSN).
8-bit loop counter
DATA5
CRC
D5
-
inverted D0
-
DATA nibbles D0 to D2 contain the angular value information in the single secure sensor
format.
KMA215
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
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KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
Table 6.
DATA nibbles D0 to D2: angular value
D0[1]
D1
D2[2]
12-bit value
Angle
0000
0000
0000
0
0
:
:
:
:
:
1111
1111
1111
4095
max
[1]
MSN.
[2]
LSN.
Table 7.
DATA nibbles D3 and D4: 8-bit loop counter
D3[1]
D4[2]
8-bit loop counter
0000
0000
0
:
:
:
1111
1111
255
[1]
MSN.
[2]
LSN.
The KMA215 supports the single secure sensor format in different configurations which
can be programmed in the configuration register. Shorthand notations of available
configurations and corresponding SENT mode register values are listed in Table 8.
Table 8.
Single secure sensor format configurations
Shorthand notation
SENT SENT
mode release
Clock
tick time
DATA
nibbles
PAUSE
pulse
Serial
message
Data
format
SENT2010-03.0us-6dn-npp-nsp-A.3 (default)
04h
2010
3.0 s
6
no
no
A.3
SENT2010-03.0us-6dn-npp-esp-A.3
05h
2010
3.0 s
6
no
yes
A.3
SENT2010-03.0us-6dn-ppc(297.0)-nsp-A.3
06h
2010
3.0 s
6
yes
no
A.3
SENT2010-03.0us-6dn-ppc(297.0)-esp-A.3
07h
2010
3.0 s
6
yes
yes
A.3
SENT2010-04.5us-6dn-npp-nsp-A.3
08h
2010
4.5 s
6
no
no
A.3
SENT2010-04.5us-6dn-npp-esp-A.3
09h
2010
4.5 s
6
no
yes
A.3
SENT2010-04.5us-6dn-ppc(297.0)-nsp-A.3
0Ah
2010
4.5 s
6
yes
no
A.3
SENT2010-04.5us-6dn-ppc(297.0)-esp-A.3
0Bh
2010
4.5 s
6
yes
yes
A.3
SENT2010-06.0us-6dn-npp-nsp-A.3
0Ch
2010
6.0 s
6
no
no
A.3
SENT2010-06.0us-6dn-npp-esp-A.3
0Dh
2010
6.0 s
6
no
yes
A.3
SENT2010-06.0us-6dn-ppc(297.0)-nsp-A.3
0Eh
2010
6.0 s
6
yes
no
A.3
SENT2010-06.0us-6dn-ppc(297.0)-esp-A.3
0Fh
2010
6.0 s
6
yes
yes
A.3
SENT2010-12.0us-6dn-npp-nsp-A.3
10h
2010
12.0 s
6
no
no
A.3
SENT2010-12.0us-6dn-npp-esp-A.3
11h
2010
12.0 s
6
no
yes
A.3
SENT2010-12.0us-6dn-ppc(297.0)-nsp-A.3
12h
2010
12.0 s
6
yes
no
A.3
SENT2010-12.0us-6dn-ppc(297.0)-esp-A.3
13h
2010
12.0 s
6
yes
yes
A.3
SENT2010-24.0us-6dn-npp-nsp-A.3
14h
2010
24.0 s
6
no
no
A.3
SENT2010-24.0us-6dn-npp-esp-A.3
15h
2010
24.0 s
6
no
yes
A.3
SENT2010-24.0us-6dn-ppc(297.0)-nsp-A.3
16h
2010
24.0 s
6
yes
no
A.3
SENT2010-24.0us-6dn-ppc(297.0)-esp-A.3
17h
2010
24.0 s
6
yes
yes
A.3
KMA215
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
9 of 50
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
6.1.5.2
Dual throttle position sensor format A.1
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The KMA215 transmits the sequence defined in Table 9 repeatedly in accordance with the
dual throttle position sensor format defined in SAE J2716 JAN2010 SENT appendix A.1.
DATA nibbles D0 to D2 contain the 12-bit angular value. DATA nibbles D3 to D5 contain
the opposite slope of the same 12-bit angular value while also the order of these DATA
nibbles is reversed.
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Fig 6.
Table 9.
SYNC
-
Dual throttle position sensor format A.1
Data content of dual throttle position sensor format A.1 frame
STATUS
DATA0
error flag
D0[1]
-
DATA1
DATA2
DATA3
D1
D2[2]
D5[2]
12-bit angular value
[1]
MSN.
[2]
LSN.
DATA4
DATA5
D4
D3[1]
12-bit inverted slope angular value
CRC
-
DATA nibbles D0 to D2 contain the angular value information in the dual throttle position
sensor format.
Table 10.
DATA nibbles D0 to D2: angular value
D0[1]
D1
D2[2]
12-bit value
Angle
0000
0000
0001
1
0
:
:
:
:
:
1111
1111
1110
4094
max
[1]
MSN.
[2]
LSN.
For the inverted slope angular value in the DATA nibbles DATA3 to DATA5 the order of the
nibbles is also reversed: LSN, MidSN, MSN. When a diagnostic condition occurs, the
DATA nibbles D0 to D2 are all set to Fh and DATA nibbles DATA3 to DATA5 are all set to
0h.
KMA215
Product data sheet
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Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
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KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
Table 11.
DATA nibbles DATA[5:3]: inverted slope angular value
D5[1]
D4
D3[2]
12-bit value
Angle
0000
0000
0001
1
max
:
:
:
:
:
1111
1111
1110
4094
0
[1]
MSN.
[2]
LSN.
For the dual throttle position sensor format A.1 clamping levels must be set to the correct
values to comply to the SAE J2716 SENT specification. Otherwise angular values
overwrite reserved data range for diagnostic information. The angular range multiplier and
clamp switch angle must also be adapted thus the desired angular range is mapped to the
remaining data range correctly.
Settings for dual throttle position sensor format A.1 180 full angular range; also see
Table 33:
CLAMP_LO: 0001h
CLAMP_HI: 0FFEh
ANG_RNG_MULT: 3FFFh
The KMA215 supports the A.1 dual throttle position sensor format in different
configurations which can be programmed in the configuration register. Shorthand
notations of available configurations and corresponding SENT mode register values are
listed in Table 12.
Table 12.
Dual throttle position sensor format configurations
Shorthand notation
SENT SENT
mode release
Clock
tick time
DATA
nibbles
PAUSE
pulse
Serial
message
Data
format
SENT2010-03.0us-6dn-npp-nsp-A.1
44h
2010
3.0 s
6
no
no
A.1
SENT2010-03.0us-6dn-npp-esp-A.1
45h
2010
3.0 s
6
no
yes
A.1
SENT2010-03.0us-6dn-ppc(297.0)-nsp-A.1
46h
2010
3.0 s
6
yes
no
A.1
SENT2010-03.0us-6dn-ppc(297.0)-esp-A.1
47h
2010
3.0 s
6
yes
yes
A.1
SENT2010-04.5us-6dn-npp-nsp-A.1
48h
2010
4.5 s
6
no
no
A.1
SENT2010-04.5us-6dn-npp-esp-A.1
49h
2010
4.5 s
6
no
yes
A.1
SENT2010-04.5us-6dn-ppc(297.0)-nsp-A.1
4Ah
2010
4.5 s
6
yes
no
A.1
SENT2010-04.5us-6dn-ppc(297.0)-esp-A.1
4Bh
2010
4.5 s
6
yes
yes
A.1
SENT2010-06.0us-6dn-npp-nsp-A.1
4Ch
2010
6.0 s
6
no
no
A.1
SENT2010-06.0us-6dn-npp-esp-A.1
4Dh
2010
6.0 s
6
no
yes
A.1
SENT2010-06.0us-6dn-ppc(297.0)-nsp-A.1
4Eh
2010
6.0 s
6
yes
no
A.1
SENT2010-06.0us-6dn-ppc(297.0)-esp-A.1
4Fh
2010
6.0 s
6
yes
yes
A.1
SENT2010-12.0us-6dn-npp-nsp-A.1
50h
2010
12.0 s
6
no
no
A.1
SENT2010-12.0us-6dn-npp-esp-A.1
51h
2010
12.0 s
6
no
yes
A.1
SENT2010-12.0us-6dn-ppc(297.0)-nsp-A.1
52h
2010
12.0 s
6
yes
no
A.1
SENT2010-12.0us-6dn-ppc(297.0)-esp-A.1
53h
2010
12.0 s
6
yes
yes
A.1
SENT2010-24.0us-6dn-npp-nsp-A.1
54h
2010
24.0 s
6
no
no
A.1
KMA215
Product data sheet
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Rev. 1 — 24 February 2014
© NXP B.V. 2014. All rights reserved.
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KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
Table 12.
Dual throttle position sensor format configurations …continued
Shorthand notation
SENT SENT
mode release
Clock
tick time
DATA
nibbles
PAUSE
pulse
Serial
message
Data
format
SENT2010-24.0us-6dn-npp-esp-A.1
55h
2010
24.0 s
6
no
yes
A.1
SENT2010-24.0us-6dn-ppc(297.0)-nsp-A.1
56h
2010
24.0 s
6
yes
no
A.1
SENT2010-24.0us-6dn-ppc(297.0)-esp-A.1
57h
2010
24.0 s
6
yes
yes
A.1
6.1.5.3
High-speed 12-bit message format H.3
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&5&FKHFNVXP
The KMA215 supports a special high-speed 12-bit message format mode that realizes
almost a doubling of the update rate compared to the other modes. The increase of the
update rate is achieved by transmitting 12-bit angular data with only four DATA nibbles
using only 3 bit of the available 4 bit per nibble. The MSB of each nibble is always zero.
Additionally, the clock tick length is reduced to 2.7 s typically with a maximum variation of
10 %. The SYNC, STATUS and CRC nibble and the serial communication are the same
as in the other modes described in Section 6.1.5.1. A PAUSE pulse option is not available
for the high-speed 12-bit message format. The high-speed 12-bit message format H.3
complies to the SAE J2716 JAN2010 standard.
ELW
ELW
ELW
ELW
ELW
ELW
6<1&
IDVWFKDQQHO
WLFNV
ELWPHVVDJH
RYHUDOOPHVVDJHFORFNWLFNVWRFORFNWLFNVGHSHQGLQJRQGDWDYDOXHV
DDD
Fig 7.
Example encoding scheme for a high-speed 12-bit frame
Table 13.
Data content of high-speed 12-bit message format frame
SYNC
[1]
MSN.
[2]
LSN.
STATUS
DATA0
error flag
D0[1]
DATA1
D1
DATA2
DATA3
CRC
D2
D3[2]
-
12-bit angular value
-
To limit the total message length below 500 s respectively 550 s with serial data
communication some data values are reserved as described in Table 14.
KMA215
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Programmable angle sensor with SAE J2716 SENT
Table 14. DATA nibbles D0 to D3: angular value
The MSB of each nibble is always zero.
D0[1]
D1
D2
D3[2]
12-bit value
Angle
0000
0000
0000
0000
0
initialization; the initialization message is transmitted during the
sensor initialization phase until valid value is available
0000
0000
0000
0001
1
0
:
:
:
:
:
:
0111
0111
0111
0000
4088
max
0111
0111
0111
0001
4089
reserved
0111
0111
0111
0010
4090
diagnostic condition[3]
0111
0111
0111
0011
4091
reserved
0111
0111
0111
0100
4092
reserved
0111
0111
0111
0101
4093
reserved
0111
0111
0111
0110
4094
reserved
0111
0111
0111
0111
4095
reserved
[1]
MSN.
[2]
LSN.
[3]
For detailed diagnostic information, the serial data communication can be enabled.
For the 12-bit high-speed mode H.3 clamping levels must be set to the correct values to
comply to the SAE J2716 SENT specification. Otherwise angular values overwrite
reserved data range for diagnostic information. The angular range multiplier and clamp
switch angle must also be adapted thus the desired angular range is mapped to the
remaining data range correctly.
Settings for high-speed 12-bit fast mode 180 full angular range; also see Table 33:
CLAMP_LO: 0001h
CLAMP_HI: 0FF8h
ANG_RNG_MULT: 3FE0h
The KMA215 supports the high-speed 12-bit message format H.3 in different
configurations which can be programmed in the configuration register. Shorthand
notations of available configurations are listed in Table 15.
Table 15.
High-speed 12-bit message format H.3 configurations
Shorthand notation
SENT SENT
mode release
Clock
tick time
DATA
nibbles
PAUSE
pulse
Serial
message
Data
format
SENT201x-03.0us-4dn-npp-nsp-H.3
20h
201x
3.0 s[1]
4
no
no
H.3
SENT201x-03.0us-4dn-npp-esp-H.3
21h
201x
3.0 s[1]
4
no
yes
H.3
[1]
2.7 s 10 %.
KMA215
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Programmable angle sensor with SAE J2716 SENT
6.1.6 Enhanced serial data communication
Beside the normal message transmission also a slow serial data communication is
realized using bit #2 and bit #3 of the STATUS nibble. The slow channel message
stretches over 18 consecutive SENT frames and contains MR sensor bridge temperature,
diagnostic/status information and user-programmable messages. These messages
comply with the enhanced serial data message format with 8-bit message ID and 12-bit
message data described in the SAE J2716 JAN2010 SENT specification.
Table 16 shows the serial message cycle that is constantly repeated when enhanced
serial data communication is enabled.
Table 16.
Serial message schedule
Message number in
serial message cycle
8-bit message ID
Definition
1
01h
diagnostic status code
2
23h
ambient temperature
3
03h
channel 1/2 sensor type
4
05h
manufacturer code
5
06h
SENT standard revision
6
23h
ambient temperature
7
90h
OEM CODE #1
8
91h
OEM CODE #2
9
92h
OEM CODE #3
10
93h
OEM CODE #4
11
94h
OEM CODE #5
12
95h
OEM CODE #6
13
96h
OEM CODE #7
14
97h
OEM CODE #8
Table 17.
Comment
user-programmable
data content
Enhanced serial messages
8-bit
12-bit message
message ID 12-bit code
Definition
Comment
Diagnostic status code
01h
000h
no error
001h
channel 1 out of range HIGH
output value above
OOR_THRESHOLD_HI
register
002h
channel 1 out of range LOW
output value below
OOR_THRESHOLD_LO
register
003h to 8FFh
not applicable
reserved
900h to 9FFh
reserved
A00h to AFFh ERROR BYTE (diagnostic bits of
command register)
KMA215
Product data sheet
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Rev. 1 — 24 February 2014
description of the
ERROR_BYTE can be
found in Table 18
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Programmable angle sensor with SAE J2716 SENT
Table 17.
Enhanced serial messages …continued
8-bit
12-bit message
message ID 12-bit code
Definition
Comment
Channel 1/2 sensor type
03h
051h
acceleration pedal position sensor 1 or
acceleration pedal position sensor 2
000b
052h
acceleration pedal position sensor 1 or
secure sensor
001b
053h
acceleration pedal position sensor 2
(redundant signal) or secure sensor
010b
054h
throttle position sensor 1 or throttle
position sensor 2
011b
055h
throttle position sensor 1 or secure
sensor
100b
056h
throttle position sensor 2 (redundant
signal) or secure sensor
101b
059h
angle position sensor
110b default value
05Ah
angle position sensor or secure sensor
111b
NXP Semiconductors
fix value
003h
SAE J2716 JAN2010 SENT revision 3
default value
004h
SAE J2716 xxx201x SENT revision 4
Manufacturer code
05h
04Eh
SENT standard revision
06h
Supplementary data channel #4,1
23h
000h to 0FFh
sensor temperature value
000h: 55 C
:
00Fh: 40 C
:
037h: 0 C
:
0D7h: 160 C
:
0FFh: 200 C
100h to FFFh
reserved
OEM CODE #1
90h
12 bit
OEM CODE #1
OEM CODE #2
91h
12 bit
OEM CODE #2
OEM CODE #3
92h
12 bit
OEM CODE #3
OEM CODE #4
93h
12 bit
OEM CODE #4
OEM CODE #5
94h
KMA215
Product data sheet
12 bit
OEM CODE #5
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Programmable angle sensor with SAE J2716 SENT
Table 17.
Enhanced serial messages …continued
8-bit
12-bit message
message ID 12-bit code
Definition
Comment
OEM CODE #6
95h
12 bit
OEM CODE #6
OEM CODE #7
96h
12 bit
OEM CODE #7
OEM CODE #8
97h
Table 18.
12 bit
OEM CODE #8
ERROR BYTE - data content
Bit
Symbol
Description
7 (MSB)
-
reserved
6
-
reserved
5
ERR_CORRECT
corrected single-bit error
4
BROKEN_BOND_DET
broken bond wire detected
3
-
reserved
2
-
reserved
1
-
reserved
0 (LSB)
MAGNET_LOSS_DET
magnet-loss detected
7. Diagnostic features
The KMA215 provides several diagnostic features:
7.1 CRC and EDC supervision
The KMA215 includes a supervision of the programmed data. At power-on, a CRC of the
non-volatile memory is performed. Furthermore the memory is protected against bit
errors. Every 16-bit data word is saved internally as a 22-bit word for this purpose.
The protection logic corrects any single-bit error in a data word, while the sensor
continues in normal operation mode. Furthermore the logic detects double-bit error per
word and switches the output into diagnostic mode.
If there is a CRC error or double-bit error of the non-volatile memory a correct SENT
configuration cannot be guaranteed anymore thus the output is set to LOW.
7.2 Magnet-loss detection
If the applied magnetic field strength is not sufficient, the KMA215 can raise a diagnostic
condition. In order to enter the diagnostic mode, due to magnet-loss, enable the detection
first. The magnet-loss information is then stored in the command register.
7.3 Broken bond wire detection
The broken bond wire detection circuit enables the detection of an interrupted supply or
ground line of the MR sensor bridge. If there is a broken bond wire, the corresponding
status bit of the command register is set.
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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 Vth(off) or above the
overvoltage threshold Vth(ov) voltage, the output is set to LOW. Table 19 describes the
system behavior depending on the voltage range of the supply voltage.
Table 19.
System behavior
Supply voltage
State
Description
0 V to 1.8 V
start-up power high-ohmic output stage; external pull-up resistor defines
output voltage
1.8 V to VPOR
power-on
reset
The output buffer drives an active LOW. During the reset
phase, all circuits are in reset and/or Power-down mode.
VPOR to Vth(on) or
Vth(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.
Vth(on) or Vth(off) to functional
minimum VDD
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 VDD to
maximum VDD
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 VDD to
Vth(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.
Vth(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.
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.
KMA215
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Programmable angle sensor with SAE J2716 SENT
Table 20.
Diagnostic behavior
Diagnostic
condition
Error bit in
command
register
Low
voltage[1]
LOW_VOLTAGE n/a
_DET
Overvoltage n/a
STATUS
nibble in
SENT
message
n/a
Output
behavior
Duration
Termination
condition
output set to
LOW
40 s < t < 120 s functional or
normal
operation
output set to
LOW
40 s < t < 120 s functional or
normal
operation
Single-bit
error
ERR_CORRECT optional:
prewarning
bit if
enabled
diagnostic status n/a
code message
in Enhanced
Serial Protocol
(ESP)[2]
power-on
reset[3]
Double-bit
error
UNCORR_ERR
output set to
LOW
power-on
reset[3]
n/a
n/a
Magnet-loss MAGNET_LOSS diagnostic
_DET
bit
diagnostic status 2.5 ms < t < 6 ms
code message
in ESP[2]
magnet
present[3]
Broken
bond wire
BROKEN_BOND diagnostic
_DET
bit
diagnostic status 0.2 ms < t < 1 ms
code message
in ESP[2]
power-on
reset[3]
Signal out
of range
HIGH
OOR_HI
prewarning
bit
diagnostic status 2.5 ms < t < 6 ms
code message
in ESP[2]
signal in
range
Signal out
of range
LOW
OOR_LO
prewarning
bit
diagnostic status 2.5 ms < t < 6 ms
code message
in ESP[2]
signal in
range
[1]
Supply voltage drops below functional operation range longer than 80 s (typical value) initiate a start-up
sequence including diagnostic LOW at the digital output. Supply voltage drops down to 2.3 V (typical value)
shorter than 5 s (typical value) abort the transmission of the current SENT frame. A new SENT frame is
started within 400 s after supply voltage returns to levels higher than the switch-on threshold voltage
Vth(on). If applicable, the loop counter value of the single secure sensor protocol frame is incremented by 12
to indicate this short voltage drop at the supply. If applicable, the enhanced serial message is also
restarted.
[2]
Enhanced serial protocol must be enabled to transmit diagnostic message.
[3]
Status bit stays set in command register until power-on reset.
7.7 Power-loss behavior
If there is ground or power-loss the output becomes high-ohmic and the external pull-up
resistor of the SENT receiver circuit defines the OUT/DATA voltage level.
If there is ground-loss the output goes to supply level without oscillation.
If there is power-loss there is still a connection to the supply voltage via the external
pull-up resistor of the SENT receiver circuit. When the voltage between VDD and GND
becomes less than Vth(off), the output goes to diagnostic LOW. At lower supply voltages,
below VPOR, the output becomes high-ohmic and is pulled up by the external resistor.
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Programmable angle sensor with SAE J2716 SENT
8. Limiting values
Table 21. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
VDD
supply voltage
VO
output voltage
VO(ov)
overvoltage output voltage
Tamb < 140 C
at t < 1 h
Ir
reverse current
Tamb < 70 C
Tamb
ambient temperature
40
+160
C
Tamb(pr)
programming ambient temperature
10
70
C
Tstg
storage temperature
40
+125
C
[1]
Min
Max
Unit
0.3
+16
V
0.3
+16
V
Vth(ov)
16
V
-
150
mA
Non-volatile memory
tret(D)
data retention time
Nendu(W_ER) write or erase endurance
[1]
Tamb = 50 C
17
-
year
Tamb(pr) = 70 C
100
-
cycle
Overvoltage on digital output and supply within the specified operating voltage range.
9. Recommended operating conditions
Table 22. Operating conditions
In a homogenous magnetic field.
Symbol
Parameter
VDD
supply voltage
Tamb
Min
Typ
Max
Unit
4.5
5.0
5.25
V
ambient temperature
40
-
+160 C
Tamb(pr)
programming ambient temperature
10
-
70
C
RL(pu)
pull-up load resistance
CL(ext)
external load capacitance
[1]
external magnetic field strength
Hext
[1]
Conditions
10
-
55
k
[1][2][3]
0
-
3.5
nF
[2][4]
0
-
6.8
nF
35
-
-
kA/m
Normal operation mode.
[2]
Between ground and digital output.
[3]
W/o internal load capacitor CL; part of capacity is defined as input capacitor inside receiver circuit according
to SENT specification; also see application information in Section 16.
[4]
Command mode.
10. Thermal characteristics
Table 23.
KMA215
Product data sheet
Thermal characteristics
Symbol
Parameter
Rth(j-a)
thermal resistance from junction to
ambient
Conditions
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Rev. 1 — 24 February 2014
Typ
Unit
145
K/W
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Programmable angle sensor with SAE J2716 SENT
11. Characteristics
Table 24. Supply current
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
Parameter
Conditions
supply current
IDD
IDD(ripple)
ripple supply current
Min
Typ
Max
Unit
[1][2]
5
-
12
mA
[3]
-
-
14
mA
-
1
2
mA
-
-
7
mA
-
-
37
mA
peak-to-peak value
Ioff(ov)
overvoltage switch-off
current
[4]
IO(sc)
short-circuit output current
[5]
[1]
Normal operation excluding overvoltage and undervoltage within the specified operating supply voltage range.
[2]
Without load current at the digital output.
[3]
Normal operation and diagnostic mode over full voltage range up to limiting supply voltage at steady state.
[4]
Diagnostic mode for a supply voltage above the overvoltage threshold voltage up to the limiting supply voltage.
[5]
If OUT/DATA is shorted to GND or VDD, respectively.
Table 25. Power-on reset
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Vth(on)
switch-on threshold
voltage
SENT transmission, if
VDD > Vth(on)
-
4.30
4.45
V
Vth(off)
switch-off threshold
voltage
digital output set to LOW, if
VDD < Vth(off)
3.90
4.10
-
V
Vhys
hysteresis voltage
Vhys = Vth(on) Vth(off)
0.1
0.2
-
V
VPOR
power-on reset voltage
IC is initialized
-
3.3
3.6
V
Vth(ov)
overvoltage threshold
voltage
digital output set to LOW, if
VDD > Vth(ov)
6.5
7.5
8.0
V
Vhys(ov)
overvoltage hysteresis
voltage
0.1
0.3
-
V
Table 26. Module performance
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
Min
Typ
Max
Unit
angle resolution
[1]
-
-
0.044
deg
max
maximum angle
programmable angular range
[2]
6
-
180
deg
ref
reference angle
programmable zero angle
[2]
0
-
180
deg
VOH
HIGH-level output voltage
at 0.1 mA DC load current
4.1
-
4.7
V
VOL
LOW-level output voltage
at 0.5 mA DC load current
res
lin
Parameter
linearity error
KMA215
Product data sheet
Conditions
-
-
0.5
V
temperature range
40 C to +160 C
[3]
1
-
+1
deg
temperature range
40 C to +140 C
[3]
0.9
-
+0.9
deg
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Table 26. Module performance …continued
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
temp
tempRT
hys
lin
ang
Parameter
temperature drift error
temperature drift error at
room temperature
hysteresis error
microlinearity error
angular error
mang
slope of angular error
Tsen
sensor temperature
accuracy
Tsen(res)
Conditions
Min
Typ
Max
Unit
temperature range
40 C to +160 C
[1][3][4]
-
-
0.8
deg
temperature range
40 C to +140 C
[1][3][4]
-
-
0.65
deg
temperature range
40 C to +160 C
[3][4][5]
-
-
0.6
deg
temperature range
40 C to +140 C
[3][4][5]
-
-
0.5
deg
referred to input
[3]
-
-
0.09
deg
referred to input
[3]
0.1
-
+0.1
deg
temperature range
40 C to +160 C
[3][6]
1.2
-
+1.2
deg
temperature range
40 C to +140 C
[3][6]
1.05
-
+1.05
deg
[3][6]
-
-
0.04
deg/deg
Tamb < 0 C
20
-
+20
C
Tamb = 0 C to 160 C
10
-
+10
C
-
1
-
C
sensor temperature
resolution
[1]
max = 180.
[2]
In steps of resolution < 0.044.
[3]
Definition of errors is given in Section 12.
[4]
Based on a 3 standard deviation.
[5]
Room temperature is given for an ambient temperature of 25 C.
[6]
Graph of angular error is shown in Figure 8.
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Programmable angle sensor with SAE J2716 SENT
DQJ_
GHJ
ĮĮGHJ
DDD
(1) 40 C to +160 C
(2) 40 C to +140 C
Fig 8.
Envelope curve for the magnitude of angular error
Table 27. Dynamics
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
ton
turn-on time
until first falling edge of SENT
frame
-
-
5
ms
fupd
update frequency
[1]
1.2
-
2.2
kHz
ts
settling time
after an ideal mechanical
angle step of 45, until first
falling edge of start of the
SENT frame where 90 % of
the final value is reached
[2]
-
-
1.8
ms
Tclk
clock period
SENT clock tick time 3.0 s
[3]
2.7
3.0
3.3
s
3.6
4.5
5.4
s
SENT clock tick time 4.5 s
KMA215
Product data sheet
SENT clock tick time 6.0 s
4.8
6.0
7.2
s
SENT clock tick time 12.0 s
9.6
12.0
14.4
s
SENT clock tick time 24.0 s
19.2
24.0
28.8
s
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Table 27. Dynamics …continued
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
Parameter
Conditions
tjit
jitter time
variation of maximum nibble
time (6) compared to the
expected time derived from
the calibration pulse
fall time
tf
rise time
tr
tstab
stabilization time
Min
Typ
Max
Unit
Tclk = 3.0 s
-
-
0.1
s
Tclk = 4.5 s
-
-
0.15
s
Tclk = 6.0 s
-
-
0.2
s
Tclk = 12.0 s
-
-
0.4
s
Tclk = 24.0 s
-
-
0.8
s
SLOPE_TIME setting
6.5 s
4.5
5.5
6.5
s
SLOPE_TIME setting
9.75 s
6.75
8.25
9.75
s
SLOPE_TIME setting
13.0 s
9
11
13
s
SLOPE_TIME setting
6.5 s
-
-
18
s
SLOPE_TIME setting
9.75 s
-
-
27
s
SLOPE_TIME setting
13.0 s
-
-
36
s
Tclk = 3.0 s
6
-
-
s
Tclk = 4.5 s
9
-
-
s
Tclk = 6.0 s
12
-
-
s
from 3.8 V to 1.1 V output
level
from 1.1 V to 3.8 V output
level
output level below 1.39 V
(LOW) or above 3.8 V (HIGH)
Tclk = 12.0 s
24
-
-
s
Tclk= 24.0 s
48
-
-
s
tcmd(ent)
enter command mode time after power-on
20
-
30
ms
trec(ov)
overvoltage recovery time
-
-
4
ms
after overvoltage
[1]
SENT update rate at Tclk = 3.0 s, 6 DATA nibbles and no PAUSE pulse.
[2]
The mechanical angle step is not synchronized with the SENT frame. Thus the worst case settling time is extended with the length of a
complete SENT frame.
[3]
12-bit fast mode; Tclk = 2.40 s (minimum), 2.67 s (typical), 3.0 s (maximum).
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Table 28. Programming interface (OWI)
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
Parameter
VIH
HIGH-level input voltage
80
-
-
%VDD
VIL
LOW-level input voltage
-
-
20
%VDD
VOH
HIGH-level output voltage
IO = 2 mA
80
-
-
%VDD
VOL
LOW-level output voltage
IO = 2 mA
-
-
20
%VDD
Iod
overdrive current
absolute value for overdriving
the output buffer
-
-
25
mA
tstart
start time
LOW level before rising edge
5
-
-
s
tstop
stop time
HIGH level before falling edge
5
-
-
s
Tbit
bit period
the load capacitance limits the
minimum period
10
-
100
s
Tbit
bit period deviation
deviation between received
clock and sent clock
0.8Tbit
1Tbit
1.2Tbit
s
tw0
pulse width 0
0.175Tbit
0.25Tbit
0.375Tbit
s
tw1
pulse width 1
0.625Tbit
0.75Tbit
0.825Tbit
s
tto
time-out time
communication reset
guaranteed after minimum tto
250
-
-
s
ttko(slv)
slave takeover time
duration of LOW level for
slave takeover
1
-
5
s
ttko(mas)
master takeover time
duration of LOW level for
master takeover
0Tbit
-
0.5Tbit
s
tprog
programming time
for a single memory address
20
-
-
ms
[1]
Conditions
Min
[1]
Typ
Max
Unit
To enter the command mode, the OUT/DATA pin must be kept HIGH for at least tto before sending the initial command sequence.
Table 29. Internal capacitances
Characteristics are valid for the operating conditions, as specified in Section 9.
Symbol
Cblock
CL
[1]
Parameter
Conditions
Min
Typ
Max
Unit
blocking capacitance
[1]
50
100
150
nF
load capacitance
[1]
1.1
2.2
3.3
nF
Measured at 1 MHz.
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12. Definition of errors
12.1 General
Angular measurement errors by the KMA215 result from linearity errors, temperature drift
errors and hysteresis errors. Figure 9 shows the output signal of an ideal sensor, where
the measured angle meas corresponds ideally to the magnetic field angle . This curve
represents the angle reference line ref() with a slope of 0.01/LSB.
φmeas
(deg)
φref(α)
180
α (deg)
001aag812
Fig 9. Definition of the reference line
The angular range is set to max = 180 for a valid definition of errors.
12.2 Hysteresis error
The device output performs a positive (clockwise) rotation and negative (counter
clockwise) rotation over an angular range of 180 at a constant temperature.
The maximum difference between the angles defines the hysteresis error hys.
φmeas
(deg)
Δφhys
180
α (deg)
001aag813
Fig 10. Definition of the hysteresis error
Equation 1 gives the mathematical description for the hysteresis value hys:
hys() = meas( 180 ) – meas( 0 )
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12.3 Linearity error
The KMA215 output signal deviation from a best straight line BSL, with the same slope as
the reference line, is defined as linearity error. The magnetic field angle is varied at fixed
temperatures for measurement of this linearity error. The output signal deviation from the
best straight line at the given temperature is the linearity error lin. It is a function of the
magnetic field angle and the temperature of the device Tamb.
φmeas
(deg)
φBSL(α, Tamb)
φref(α)
Δφlin(α, Tamb)
180
α (deg)
001aag814
Fig 11. Definition of the linearity error
12.4 Microlinearity error
is the magnetic field angle. If = 1, the microlinearity error lin is the device output
deviation from 1.
φmeas
(deg)
φref(α)
Δφmeas = 1° + Δφμlin(α)
Δα = 1°
α (deg)
001aag815
Fig 12. Definition of the microlinearity error
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12.5 Temperature drift error
The temperature drift temp is defined as the envelope over the deviation of the angle
versus the temperature range. It is considered as the pure thermal effect.
φmeas
(deg)
Ty
Tx
Δφtemp
180
α (deg)
001aag816
Fig 13. Definition of the temperature drift error
Equation 2 gives the mathematical description for temperature drift value temp:
temp() = meas( , T x) – meas( , T y)
(2)
with:
Tx: temperature for maximum meas at angle
Ty: temperature for minimum meas at angle
The deviation from the value at room temperature tempRT describes the temperature
drift of the angle, compared to the value, which the sensor provides at room temperature:
temp
RT( ,
T amb) = meas( , T amb) – meas( , T RT)
(3)
with:
TRT: room temperature (25 C)
12.6 Angular error
The angular error ang is the difference between mechanical angle and sensor output
during a movement from 0 to 1. Here 0 and 1 are arbitrary angles within the angular
range. The customer initially programs the angle measurement at 0 at room temperature
and zero hour upon production. The angle measurement at 1 is made at any temperature
within the ambient temperature range:
ang = meas( 1 , T amb) – meas( 0 , T RT) – 1 – 0
(4)
with:
0, 1: arbitrary mechanical angles within the angular range
meas(0, TRT): programmed angle at 0, TRT = 25 C and zero hour upon production
meas(1, Tamb): the sensor measures angle at 1 and any temperature within Tamb
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This error comprises non-linearity and temperature drift related to the room temperature.
|Δφang|
mang
|Δφang(peak)|
|Δφμlin + Δφtemp|RT|
−α*
α0 − 1° α0 + 1°
α0
+α*
α1
001aal766
Fig 14. Envelope curve for the magnitude of angular error
Figure 14 shows the envelope curve for the magnitude of angular error |ang| versus 1
for all angles 0 and all temperatures Tamb within the ambient temperature range. If 1 is
in the range of 1 around 0, |ang| has its minimum. Here only the microlinearity error
lin and the temperature drift related to the room temperature |tempRT| occurs. If 1
deviates from 0 by more than 1 in either direction, |ang| can increase. Slope mang
defines the gradient.
Equation 5 to Equation 8 express the angular error:
for |1 0| 1
ang = lin + temp
(5)
RT
for 1 < |1 0| < *
ang = lin + temp
RT
+ m ang 1 – 0 – 1
(6)
RT
(7)
for |1 0| *
ang =
lin 2 + temp
2
with:
ang(peak) – lin + temp RT
= ----------------------------------------------------------------------------------- + 0 + 1
m ang
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13. Programming
13.1 General description
The KMA215 provides an OWI to enable programming of the device which uses
pin OUT/DATA bidirectionally.
In general the device runs in digital output mode, the normal operation mode.
The embedded programming data configures this mode. After a power-on reset once time
ton has elapsed,it starts. In this mode, the magnetic field angle is repeatedly transmitted
with SENT protocol.
A second mode, the command mode enables programming. In this mode, the customer
can adjust all required parameters (for example zero angle, angular range, SENT
configurations) to meet the application requirements. The data is stored in the non-volatile
memory. After changing the contents of the memory, recalculate and write the checksum
(see Section 13.4).
In order to enter the command mode, keep OUT/DATA pin HIGH for at least tto and send a
specific command sequence after a power-on reset and during the time slot tcmd(ent). The
external source used to send the command sequence must overdrive the output buffer of
the KMA215. In doing so, it provides current Iod.
During communication, the KMA215 is always the slave and the external programming
hardware is always the master. Figure 15 illustrates the structure of the OWI data format.
write
IDLE
START COMMAND DATA BYTE 1 DATA BYTE 2 STOP
IDLE
read
IDLE
START COMMAND HANDOVER DATA BYTE 1 DATA BYTE 2 TAKEOVER STOP IDLE
001aag742
Fig 15. OWI data format
The master provides the start condition, which is a rising edge after a LOW level. Then
a command byte which can be either a read or a write command is sent. Depending on
the command, the master or the slave has to send the data immediately after the
command sequence. If there is a read command, an additional handover or takeover bit is
inserted before and after the data bytes. The master must close each communication with
a stop condition. If the slave does not receive a rising edge for a time longer than tto,
a time-out condition occurs. The bus is reset to the idle state and waits for a start condition
and a new command. This behavior can be used to synchronize the device regardless of
the previous state.
All communication is based on this structure (see Figure 15), even for entering the
command mode. In this case, the write command 94h and the signature are required.
The customer can access the non-volatile memory, CTRL1, TESTCTRL0 and
SIGNATURE registers (described in Section 13.5). Only a power-on reset leaves the
command mode. A more detailed description of the programming is given in the next
sections.
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13.2 Timing characteristics
As described in the previous section, a start and stop condition is necessary for
communication. The LOW-level duration before the rising edge of the start condition is
defined as tstart. The HIGH-level duration after the rising edge of the stop condition is
defined as tstop. These parameters, together with all other timing characteristics are
shown in Table 28.
tstart
tstop
001aag817
Fig 16. OWI start and stop condition
Figure 17 shows the coding of a single bit with a HIGH level of VIH and a LOW level of VIL.
Here the pulse width tw1 or tw0 represents a logic 1 or a logic 0 of a full bit period Tbit,
respectively.
bit = 0
bit = 1
Tbit
0.175
Tbit
0.375
0.625
tw0
0.825
tw1
0.25
0.75
001aag818
Fig 17. OWI timing
13.3 Sending and receiving data
The master has to control the communication during sending or receiving data.
The command byte defines the region, address and type of command the master
requests. Read commands need an additional handover or takeover bit. Insert this bit
before and after the two data bytes (see Figure 15). However the OWI is a serial data
transmission, whereas the Most Significant Byte (MSB) send at first.
Table 30.
Format of a command byte
7
6
5
4
3
2
1
0
CMD7
CMD6
CMD5
CMD4
CMD3
CMD2
CMD1
CMD0
Table 31.
Command byte bit description
Bit
Symbol
Description
7 to 5
CMD[7:5]
region bits
000 = 16-bit non-volatile memory
001 to 011 = reserved
100 = 16-bit register
101 to 111 = reserved
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Table 31.
Command byte bit description …continued
Bit
Symbol
Description
4 to 1
CMD[4:1]
address bits
0
CMD0
read/write
0 = write
1 = read
A more detailed description of all customer accessible registers is given in Section 13.5.
Both default value and the complete command including the address and write or read
request are also listed.
13.3.1 Write access
To write data to the non-volatile memory, perform the following procedure:
1. Start condition: The master drives a rising edge after a LOW level
2. Command: The master sends a write command, that is the last bit is not set
(CMD0 = 0)
3. Data: The master sends two data bytes
4. Stop condition: The master drives a rising edge after a LOW level
Figure 18 shows the write access of the digital interface. The signal OWI represents the
data on the bus from the master or slave. The signals: master output enable and slave
output enable indicate when the master or the slave output is enabled or disabled,
respectively.
START
CMD7
CMD0
WDATA15
WDATA0
STOP
IDLE
master
output
enable
OWI
(2)
slave
output
enable
(1)
001aag743
(1) Missing rising edges generate a time-out condition and the written data is ignored.
(2) If the master does not drive the bus, the bus-pull defines the bus.
Fig 18. OWI write access
Note: As already mentioned in Section 13.1, use the write procedure to enter the
command mode. If command mode is not entered, communication is not possible and the
sensor operates in normal operation mode. After changing an address, the time tprog must
elapse before changing another address. After changing the content of the non-volatile
memory, recalculate and write the checksum (see Section 13.4).
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13.3.2 Read access
To read data from the sensor, perform the following procedure:
1. Start condition: The master drives a rising edge after a LOW level
2. Command: The master sends a read command (CMD0 = 1)
3. Handover: The master sends a handover bit, that is a logic 0 and disables the output
after a three-quarter bit period
4. Takeover: The slave drives a LOW level after the falling edge for ttko(slv)
5. Data: The slave sends two data bytes
6. Handover: The slave sends a handover bit, that is a logic 0 and disables the output
after a three-quarter bit period
7. Takeover: The master drives a LOW level after the falling edge for ttko(mas)
8. Stop condition: The master drives a rising edge after a LOW level
Figure 19 shows the read access of the digital interface. The signal OWI represents the
data on the bus from the master or slave. The signals: master output enable and slave
output enable indicate when the master or the slave output is enabled or disabled,
respectively.
START
CMD7
CMD0
HANDSHAKE
RDATA15
RDATA0
HANDSHAKE
STOP
IDLE
master
output
enable
(3)
OWI
(5)
(1)
slave
output
enable
(2)
(2)
(4)
001aag744
(1) Duration of LOW level for slave takeover ttko(slv).
(2) The master output enable and the slave output enable overlap, because both drive a LOW level.
However this behavior ensures the independency from having a pull-up or pull-down on the bus.
In addition, it improves the EMC robustness, because all levels are actively driven.
(3) Duration of LOW level for master takeover ttko(mas).
(4) If the master does not take over, the pull-up generates the stop condition. Otherwise a time-out is
generated if there is a pull-down and the slave waits for a rising edge as start condition.
(5) If the master does not drive the bus, the bus-pull defines the bus.
Fig 19. OWI read access
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13.3.3 Entering the command mode
After a power-on reset, the sensor provides a time slot tcmd(ent) for entering the command
mode. Keep OUT/DATA pin HIGH for at least tto and send a specific command sequence
(see Figure 20). If command mode is not entered, the sensor starts in the normal
operation mode.
During the command mode sequence, the digital SENT output is enabled. The external
programming hardware has to overdrive the output with current Iod. If command mode is
activated, the digital SENT output is disabled and pin OUT/DATA operates as a digital
bidirectional programming interface.
WFPGHQW
9''
WWR
2:,
67$57
K
FRPPDQG
%K
$K
6723
VLJQDWXUH
DDD
Fig 20. OWI command mode procedure
13.4 Cyclic redundancy check
As already mentioned in Section 7, there is an 8-bit checksum for the non-volatile memory
data. To calculate this value, the MSB of the memory data word generates the CRC at first
over all corresponding addresses in increasing order.
Read out all addresses from 0h to Eh for calculating the checksum. The Least Significant
Byte (LSB) of address Eh contains the previous checksum. Overwrite the value with 0h
before starting the checksum calculation.
The generator polynomial for the calculation of the checksum is:
8
2
G(x) = x + x + x + 1
(9)
With a start value of FFh and the data bits are XOR at the x8 point.
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13.4.1 Software example in C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#include <stdio.h.>
int generate_crc(unsigned int data[], int arr_length)
{
// generator polynomial
const int gpoly = 0x107;
// initial value of checksum
int crc = 0xFF;
// print data values and calculate CRC
printf(“\nAddress\tValue\n”);
for (int index = 0; index <= arr_length-1; index++) {
printf(“0x%1X\t0x%04X\n”, index, data[index]);
for (int bitnr = 15; bitnr >= 0; bitnr--) {
crc <<= 1;
crc = (int) ((data[index] & (1u<<bitnr))>>bitnr);
if (crc & 0x100) crc ^= gpoly;
}
}
// print calculated checksum
printf(“\nCalculated Checksum: 0x%02X\n”, crc);
return crc;
}
int main_crc(void)
{
// data array for checksum calculation
// 8 LSB are CRC, fill with 0
unsigned int data[] = {0x0818, 0x0000, 0x0800,
0x0FFF, 0x0000, 0x0FFF,
0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000,
0x0000, 0x0FFF, 0x0000};
// determine size of data array
int arr_length = sizeof(data) / sizeof(unsigned int);
// calculate checksum
generate_crc(data, arr_length);
return 1;
}
This example refers to the default register values. The checksum of this data sequence is
DBh.
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13.5 Registers
13.5.1 Command registers
To enter the command mode, write the signature given in Table 32 into the specific
register using the OWI. Do this procedure as described in Section 13.3.3, with a write
command, the signature follows it, but after a power-on reset and not later than tcmd(ent).
Table 32.
Command registers
Command Register
write/read
Bit
Access Field
Description
82h/83h
15
R
IN_DIAG_MODE
shows if there is a diagnostic condition present; the
setting of register field FORCE_DIAG_OFF does
not affect this bit
14
W
FORCE_DIAG_OFF
force diagnostic mode off; default: 0b
13
-
-
reserved
12
R
LOW_VOLTAGE_DET low voltage condition detected
11 to 9
-
-
reserved
8
R
ERR_CORRECT
single-bit error of non-volatile memory has been
detected and corrected; updated every memory
readout; bit remains set until the diagnostic
condition disappears and a power-on reset is done
7
R
UNCORR_ERR
double-bit error of non-volatile memory has been
detected; updated every memory readout;
bit remains set until the diagnostic condition
disappears and a power-on reset is done
6
R
MAGNET_LOSS_DET magnet-loss detected; bit remains set until the
diagnostic condition disappears and a power-on
reset is done; enable magnet-loss detection for
raising diagnostic condition
5
R
BROKEN_BOND_DET broken bond wire detected; bit remains set until the
diagnostic condition disappears and a power-on
reset is done
4
R
CRC_BAD
checksum error detected; updated every start-up
3
R
OOR_HI
angular value above OOR_THRESHOLD_HI
threshold value
2
R
OOR_LO
angular value below OOR_THRESHOLD_LO
threshold value
1 and 0
-
-
reserved
W
SIGNATURE
to enter command mode, write signature B96Ah
within tcmd(ent); for more details, see Section 13.3.3
94h/-
CTRL1
SIGNATURE 15 to 0
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13.5.2 Non-volatile memory registers
The device includes several internal registers which are used for customization and
identification.
The initial signature allows read access to all areas but only write access to customer
registers. Write accesses to reserved areas are ignored. Since these registers are
implemented as non-volatile memory cells, writing to the registers needs a specific time
tprog after each write access to complete.
As there is no check for the programming time, make sure that no other accesses to the
non-volatile memory are made during the programming cycle. Do not address
the non-volatile memory during the time tprog.
Note: To calculate the checksum, read out and consult register addresses 0h to Eh.
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Table 33.
Non-volatile memory registers
Address Command Register
write/read
Bit
Description
MSB/LSB
Default[1]
0h
15 to 9
SENT_MODE; SENT modes; see Table 8,
Table 12 and Table 15
08h/18h
(04h)
8
SLOPE_RATIO; ratio between falling and rising
slope of SENT output
(0b)
00h/01h
SENT_CONF
0b — 7/5
1b — 1/1
7 and 6
(00b)
SLOPE_TIME; slope time of SENT output
00b — 6.5 s
01b — 9.75 s
10b — 9.75 s
11b — 13.0 s
5
SLOPE_DIR; slope of angular characteristic
(0b)
0b — normal
1b — inverted
4 to 2
SENSOR_TYPE; channel 1/2 sensor type that is
sent in the enhanced serial message ID 03h;
see Table 17
(110b)
000b — sensor type 051h
001b — sensor type 052h
010b — sensor type 053h
011b — sensor type 054h
100b — sensor type 055h
101b — sensor type 056h
110b — sensor type 059h
111b — sensor type 05Ah
1
SENT_REV; SENT revision that is sent in the
enhanced serial message ID 06h; see Table 17
(0b)
0b — SAE J2716 JAN2010 SENT revision 3
1b — SAE J2716 xxx201x SENT revision 4
0
SENT_LEGACY_CRC
(0b)
0b — recommended CRC compliant to
SAE J2716 JAN2010 SENT revision 3 and future
1b — legacy CRC compliant to SAE J2716
FEB2008 SENT revision 2 and earlier
1h
02h/03h
ZERO_ANGLE
2h
04h/05h
ANG_RNG_MULT_MSB 15 to 0
KMA215
Product data sheet
15 to 0
mechanical zero degree position; see Table 34
00h/00h
most significant bits of the angular range
multiplicator; see Table 37
08h/00h[2]
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Table 33.
Non-volatile memory registers …continued
Address Command Register
write/read
3h
06h/07h
Bit
ANG_RNG_MULT_LSB 15 to 13
12
Description
MSB/LSB
Default[1]
ANG_RNG_MULT_LSB; least significant bits of
the angular range multiplicator
0Fh/FFh
(000b)[2]
BROKEN_BONDWIRE; broken bond wire
detection
(0b)
0b — enabled
1b — disabled
4h
5h
6h
7h
8h
9h
Ah
Bh
Ch
08h/09h
0Ah/0Bh
0Ch/0Dh
0Eh/0Fh
10h/11h
12h/13h
14h/15h
16h/17h
18h/19h
11 to 0
CLAMP_SW_ANGLE; when the measured angle (FFFh)[2]
is bigger than CLAMP_SW_ANGLE the output
switches to CLAMP_LO for a positive slope;
see Table 39
15 to 12
undefined[3]
00h/00h
11 to 0
lower clamping level; see Table 35
(000h)[2]
15 to 12
undefined[3]
0Fh/FFh
11 to 0
upper clamping level; see Table 36
(FFFh)[2]
OEM CODE #7 MSB
15 to 12
user programmable code that is sent in the
enhanced serial message ID 96h; see Table 17
00h/00h
(0h)
OEM CODE #1
11 to 0
user programmable code that is sent in the
enhanced serial message ID 90h; see Table 17
(000h)
OEM CODE #7
15 to 12
user programmable code that is sent in the
enhanced serial message ID 96h; see Table 17
00h/00h
(0h)
OEM CODE #2
11 to 0
user programmable code that is sent in the
enhanced serial message ID 91h; see Table 17
(000h)
OEM CODE #7 LSB
15 to 12
user programmable code that is sent in the
enhanced serial message ID 96h; see Table 17
00h/00h
(0h)
OEM CODE #3
11 to 0
user programmable code that is sent in the
enhanced serial message ID 92h; see Table 17
(000h)
OEM CODE #8 MSB
15 to 12
user programmable code that is sent in the
enhanced serial message ID 97h; see Table 17
00h/00h
(0h)
OEM CODE #4
11 to 0
user programmable code that is sent in the
enhanced serial message ID 93h; see Table 17
(000h)
OEM CODE #8
15 to 12
user programmable code that is sent in the
enhanced serial message ID 97h; see Table 17
00h/00h
(0h)
OEM CODE #5
11 to 0
user programmable code that is sent in the
enhanced serial message ID 94h; see Table 17
(000h)
OEM CODE #8 LSB
15 to 12
user programmable code that is sent in the
enhanced serial message ID 97h; see Table 17
00h/00h
(0h)
OEM CODE #6
11 to 0
user programmable code that is sent in the
enhanced serial message ID 95h; see Table 17
(000h)
undefined[3]
00h/00h
out of range threshold LOW value
(000h)
CLAMP_LO
CLAMP_HI
OOR_THRESHOLD_LO 15 to 12
11 to 0
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Table 33.
Non-volatile memory registers …continued
Address Command Register
write/read
Bit
Description
MSB/LSB
Default[1]
Dh
15
undefined[3]
0Fh/FFh
SINGLE_BIT_ERROR_PREWARNING
(0b)
1Ah/1Bh
OOR_THRESHOLD_HI
14
0b — enabled
1b — disabled
Eh
1Ch/1Dh
CTRL_CUST
13 and 12 undefined[3]
-
11 to 0
OOR_THRESHOLD_HI; out of range threshold
HIGH value
(FFFh)
15
LOCK; irreversible write protection of non-volatile 00h/[4]
(0b)
memory
1b — enabled
14 to 8
MAGNET_LOSS; magnet-loss detection
(00h)
00h — disabled
49h — enabled
7 to 0
CRC; checksum (see Section 13.4)
(00h)
[1]
Values represent the default 16-bit value of the memory address while the values in parenthesis represent the default register value.
[2]
Settings for single secure sensor mode A.3: ANG_RNG_MULT: 40h/00h, CLAMP_SW_ANGLE: 0Fh/FFh, CLAMP_LO: 00h/01h,
CLAMP_HI: 0Fh/FFh
Settings for dual throttle position sensor format A.1 180 full angular range: ANG_RNG_MULT: 3Fh/FFh, CLAMP_SW_ANGLE:
0Fh/FFh, CLAMP_LO: 00h/01h, CLAMP_HI: 0Fh/FEh. In the dual throttle position sensor format A.1 some of the output codes are
reserved for diagnostic purposes that limits the output range to 4094 codes. The range must be limited by setting CLAMP_LO to 1,
CLAMP_HI to 4094 and ANG_RNG_MULT = (CLAMP_HI CLAMP_LO)/4095 set to 3Fh/FFh.
Settings for high-speed 12-bit fast mode H.3 180 full angular range: ANG_RNG_MULT: 3FE0h, CLAMP_SW_ANGLE: 0Fh/FFh,
CLAMP_LO: 00h/01h, CLAMP_HI: 0Fh/F8h. In the high-speed 12-bit SENT mode H.3 some of the output codes are reserved for
diagnostic purposes that limits the output range to 4088 codes. The range must be limited by setting CLAMP_LO to 1, CLAMP_HI to
4088 and ANG_RNG_MULT = (CLAMP_HI CLAMP_LO)/4095 set to 3Fh/E0h.
[3]
Undefined; write as zero for default.
[4]
Variable and individual for each device.
Table 34. ZERO_ANGLE - mechanical zero degree position (address 8h) bit allocation
Data format: unsigned fixed point; resolution: 216.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Value
21
22
23
24
25
26
27
28
29
210
211
212
213
214
215
216
Mechanical angular range 0000h = 0 to FFFFh = 180 1 LSB.
Examples:
• Mechanical zero angle 0 = 0000h
• Mechanical zero angle 10 = 0E38h
• Mechanical zero angle 45 = 4000h
Table 35. CLAMP_LO - lower clamping level output data (address 4h) bit allocation
Data format: unsigned integer; resolution: 20.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Value
U[1]
U[1]
U[1]
U[1]
211
210
29
28
27
26
25
24
23
22
21
20
[1]
Undefined; write as zero for default; returns any value when read.
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Examples:
• 80 = 1820
• 40 = 910
• 0 = 0
Table 36. CLAMP_HI - upper clamping level output data (address 5h) bit allocation
Data format: unsigned integer; resolution: 20.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Value
U[1]
U[1]
U[1]
U[1]
211
210
29
28
27
26
25
24
23
22
21
20
[1]
Undefined; write as zero for default; returns any value when read.
Examples:
• 180 = 4095
• 140 = 3185
• 100 = 2275
Table 37. ANG_RNG_MULT_MSB - most significant bits of angular range multiplicator (address 2h) bit allocation
Data format: unsigned fixed point; resolution: 21.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Value
24
23
22
21
20
21
22
23
24
25
26
27
28
29
210
211
Table 38. ANG_RNG_MULT_LSB - least significant bits of angular range multiplicator (address 3h) bit allocation
Data format: unsigned fixed point; resolution: 214.
Bit
Value
[1]
15
14
13
12
212
213
214
[1]
11
10
9
8
7
6
5
4
3
2
1
0
CLAMP_SW_ANG
BROKEN_BONDWIRE
CLAMP_HI – CLAMP_LO
180
ANG_RNG_MULT = ------------------------------------------------------------------- --------------------------------------------------4095
ANGULAR_RANGE
(10)
Example:
• Reserved data range for dual throttle position sensor format A.1 180 full angular
4094 – 1 180 ·
range: ANG_RNG_MULT = --------------------- ----------- = 0 9995115995 3FFFh
4095
180
• Reserved data range for SENT 12-bit fast mode 180 full angular range:
4088 – 1 180
ANG_RNG_MULT = --------------------- ----------- = 0.998046398 3FE0h
4095
180
Table 39. CLAMP_SW_ANGLE - clamp switch angle (address 3h) bit allocation
Data format: unsigned integer; resolution: 20.
Bit
15
Value
[1]
14
13
ANG_RNG_MULT_
LSB
12
11
10
9
8
7
6
5
4
3
2
1
0
[1]
211
210
29
28
27
26
25
24
23
22
21
20
BROKEN_BONDWIRE
Mechanical angular range 000h = 0 to FFFh = 180 1 LSB.
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1
CLAMP_HI – CLAMP_LO
1
CLAMP_SW_ANGLE = --- 1 + -------------------------------------------------------------------- -----------------------------------------------
2
4095
ANG_RNG_MULT
(11)
If the magnetic field angle is larger than the CLAMP_SW_ANGLE, the output switches to
CLAMP_LO for a positive slope. Program the value of CLAMP_SW_ANGLE, which can
be calculated from other non-volatile memory constants.
14. Electromagnetic compatibility
EMC is verified in an independent and certified test laboratory.
14.1 Emission (CISPR 25)
Tests according to CISPR 25 were fulfilled.
14.1.1 Conducted radio disturbance
Test of the device according to CISPR 25, third edition (2008-03), Chapter 6.2.
Classification level: 5.
14.1.2 Radiated radio disturbance
Test of the device according to CISPR 25, third edition (2008-03), Chapter 6.4.
Classification level: 5 (without addition of 6 dB in FM band).
14.2 Radiated disturbances (ISO 11452-1 third edition (2005-02),
ISO 11452-2, ISO 11452-4 and ISO 11452-5)
The common understanding of the requested function is that an effect is tolerated as
described in Table 40 during the disturbance. The reachable values are setup-dependent
and differ from the final application.
Table 40.
Failure condition for radiated disturbances
Parameter
Comment
Max Unit
Variation of angular value
value measured relative to the output at test start
1.8 deg
SENT sequence
allowed sequentially failing frames
2
frame
SENT transmission
allowed failing frames within 100 following frames
3
frame
14.2.1 Absorber lined shielded enclosure
Tests according to ISO 11452-2, second edition (2004-11), were fulfilled.
Test level: 200 V/m; extended up to 4 GHz.
State: A.
14.2.2 Bulk-current injection
Tests according to ISO 11452-4, third edition (2005-04), were fulfilled.
Test level: 200 mA.
State: A.
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14.2.3 Strip line
Tests according to ISO 11452-5, second edition (2002-04), were fulfilled.
Test level: 200 V/m; extended up to 1 GHz.
State: A.
14.2.4 Immunity against mobile phones
Tests according to ISO 11452-2, second edition (2004-11), were fulfilled.
State: A.
Definition of Global System for Mobile Communications (GSM) signal:
• Pulse modulation: per GSM specification (217 Hz; 12.5 % duty cycle)
• Modulation grade: 60 dB
• Sweep: linear 800 MHz to 3 GHz (duration 10 s at 890 MHz, 940 MHz and 1.8 GHz
band)
• Antenna polarization: vertical, horizontal
• Field strength: 200 V/m during on-time [calibration in Continuous Wave (CW)]
In deviation of ISO 11452-2, a GSM signal instead of an AM signal was used.
14.3 Electrical transient transmission by capacitive coupling [ISO 7637-3,
second edition (2007-07)]
The common understanding of the requested function is that an effect is tolerated as
described in Table 40 during the disturbance.
Tests according to ISO 7637-3 were fulfilled.
Test level: IV (for 12 V electrical system).
Classification level: A for positive and negative pulses assuming a start of a new SENT
frame within 400 s is allowed otherwise B.
14.4 Electrical transient transmission by inductive coupling [ISO 7637-3,
second edition (2007-07)]
The common understanding of the requested function is that an effect is tolerated as
described in Table 40 during the disturbance.
Tests according to ISO 7637-3 were fulfilled.
Test level: IV (for 12 V electrical system).
Classification level: A for positive and negative pulses assuming a start of a new SENT
frame within 400 s is allowed otherwise B.
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15. ElectroStatic Discharge (ESD)
15.1 Human body model (AEC-Q100-002)
The KMA215 is protected up to 8 kV, according to the human body model at 100 pF and
1.5 k. This protection is ensured at all external pins (OUT/DATA, VDD and GND).
Classification level: H3B.
Furthermore, all interconnects (pins between package head and package body) must not
be damaged at 2 kV.
Classification level: H2.
15.2 Human metal model (ANSI/ESD SP5.6-2009)
The KMA215 is protected up to 8 kV, according to the human metal model at 150 pF and
330 inside the ESD gun. This test utilizes waveforms of the IEC 61000-4-2 standard on
component level. Apply the contact discharge in an unsupplied state at pins OUT/DATA
and VDD referred to GND which is connected directly to the ground plane.
Test setup: A.
Test level: 5.
15.3 Machine model (AEC-Q100-003)
The KMA215 is protected up to 400 V, according to the machine model. This protection is
ensured at all external pins (OUT/DATA, VDD and GND).
Classification level: M4.
Furthermore, all interconnects (pins between package head and package body) must not
be damaged at 200 V.
Classification level: M3.
All pins have latch-up protection.
15.4 Charged-device model (AEC-Q100-011)
The KMA215 is protected up to 750 V, according to the charged-device model. This
protection is ensured at all external pins (OUT/DATA, VDD and GND).
Classification level: C4.
Furthermore, all interconnects (pins between package head and package body) is
protected up to at 500 V.
Classification level: C3B.
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16. Application information
VHQVRU
ZLULQJ
UHFHLYHU
9''
96833/<
538//83
287'$7$
.0$ 57DX
&LQSXW
5I
&7DX
&I
5Y
&
*1'
DDD
KMA215 with receiver load according to figure 6.3-2 (recommended SENT system interface circuit
topology J2716) of SAE J2716 JAN2010 SENT without additional external components near
KMA215
Fig 21. Application diagram of KMA215
17. Test information
17.1 Quality information
This product has been qualified in accordance with the Automotive Electronics Council
(AEC) standard Q100 Rev-G - Failure mechanism based stress test qualification for
integrated circuits, and is suitable for use in automotive applications.
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Programmable angle sensor with SAE J2716 SENT
18. Marking
HMHFWRUSLQ
PDUNî
111111
EDWFK
QXPEHU
$
%
; <<< =
&
&%96
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UHVWULFWHG
DUHD
DDQ
Marking paint: laser
Code: see drawing
Type face: DIN 1451 condensed type
Letter height: 0.8 mm
Line spacing: 0.25 mm
Crossing of lines not allowed
A: leading letters of type number (5 characters max.)
B: number and attached letters of type number (6 characters max.)
C: day code/date code
D: additional marking
C: capacitor type (T: TDK; M: Murata)
B: burn-in information (0: without burn-in; 1: with burn-in)
V: IC version (1, 2, 3, ...)
S: development status (X: development; C: validated; blank: released)
Line A and line C to be marked in centered position
Date code: X YYY Z
X: product manufacturing code; m for manufacturing Manila
Day code: X YYY Z
X: --Y: day of year
Z: year of production (last figure)
Fig 22. Marking
19. Terminals
Lead frame material: CuZr with 99.9 % Cu and 0.1 % Zr.
Lead finish: matt tin; thickness 7 m to 11 m.
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Programmable angle sensor with SAE J2716 SENT
20. Package outline
3ODVWLFVLQJOHHQGHGPXOWLFKLSSDFNDJH
LQWHUFRQQHFWLRQVLQOLQHOHDGV
627
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7HUPLQDOZLWKLQWKLV]RQHDUHXQFRQWUROOHGWRDOORZIRUIORZRISODVWLFEHWZHHQDQGEHVLGHVWKHOHDGVILQV
$&SNRIFDQQRWEHVDIHJXDUGHGE\SURGXFWLRQLQOLQHWHVWVGXHWROLPLWHGDFFXUDF\IRUWKHPHDVXUHPHQWRIWKLVGLPHQVLRQ
2XWOLQH
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Fig 23. Package outline SOT1288-2
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21. Handling information
5PLQ
5PLQ
DDD
Dimensions in mm
(1) No bending allowed.
(2) Plastic body and interface plastic body - leads: application of bending forces not allowed.
Fig 24. Bending recommendation
22. Solderability information
The solderability qualification is according to AEC-Q100 Rev-G. Recommended soldering
process for leaded devices is wave soldering. The maximum soldering temperature is
260 C for maximum 5 s. Device terminals are compatible with laser and electrical
welding. The device is reflow capable.
23. Revision history
Table 41.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
KMA215 v.1
20140224
Product data sheet
-
-
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24. Legal information
24.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
24.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
24.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
KMA215
Product data sheet
Suitability for use in automotive applications — This NXP
Semiconductors product has been qualified for use in automotive
applications. Unless otherwise agreed in writing, the product is not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer's own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
All information provided in this document is subject to legal disclaimers.
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No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
24.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
25. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
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Product data sheet
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49 of 50
KMA215
NXP Semiconductors
Programmable angle sensor with SAE J2716 SENT
26. Contents
1
1.1
1.2
1.2.1
2
3
4
5
5.1
6
6.1
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.5.1
6.1.5.2
6.1.5.3
6.1.6
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
8
9
10
11
12
12.1
12.2
12.3
12.4
12.5
12.6
13
13.1
13.2
13.3
13.3.1
Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1
General description . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Extract of SENT modes (shorthand notation) . . 2
Pinning information . . . . . . . . . . . . . . . . . . . . . . 2
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 3
Functional description . . . . . . . . . . . . . . . . . . . 4
Angular measurement directions . . . . . . . . . . . 4
Digital output . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Transmission of sensor messages . . . . . . . . . . 6
SYNC nibble . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
STATUS nibble . . . . . . . . . . . . . . . . . . . . . . . . . 7
CRC nibble . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PAUSE pulse . . . . . . . . . . . . . . . . . . . . . . . . . . 8
DATA nibbles . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Single secure sensor format A.3 . . . . . . . . . . . 8
Dual throttle position sensor format A.1 . . . . . 10
High-speed 12-bit message format H.3 . . . . . 12
Enhanced serial data communication. . . . . . . 14
Diagnostic features . . . . . . . . . . . . . . . . . . . . . 16
CRC and EDC supervision . . . . . . . . . . . . . . . 16
Magnet-loss detection . . . . . . . . . . . . . . . . . . 16
Broken bond wire detection . . . . . . . . . . . . . . 16
Out of range detection . . . . . . . . . . . . . . . . . . 17
Prewarning indication . . . . . . . . . . . . . . . . . . . 17
Low voltage detection and overvoltage
protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power-loss behavior . . . . . . . . . . . . . . . . . . . . 18
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 19
Recommended operating conditions. . . . . . . 19
Thermal characteristics . . . . . . . . . . . . . . . . . 19
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 20
Definition of errors. . . . . . . . . . . . . . . . . . . . . . 25
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Hysteresis error . . . . . . . . . . . . . . . . . . . . . . . 25
Linearity error . . . . . . . . . . . . . . . . . . . . . . . . . 26
Microlinearity error . . . . . . . . . . . . . . . . . . . . . 26
Temperature drift error . . . . . . . . . . . . . . . . . . 27
Angular error. . . . . . . . . . . . . . . . . . . . . . . . . . 27
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . 29
General description . . . . . . . . . . . . . . . . . . . . 29
Timing characteristics . . . . . . . . . . . . . . . . . . . 30
Sending and receiving data . . . . . . . . . . . . . . 30
Write access . . . . . . . . . . . . . . . . . . . . . . . . . . 31
13.3.2
13.3.3
13.4
13.4.1
13.5
13.5.1
13.5.2
14
14.1
14.1.1
14.1.2
14.2
Read access . . . . . . . . . . . . . . . . . . . . . . . . .
Entering the command mode. . . . . . . . . . . . .
Cyclic redundancy check . . . . . . . . . . . . . . . .
Software example in C . . . . . . . . . . . . . . . . . .
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command registers . . . . . . . . . . . . . . . . . . . .
Non-volatile memory registers . . . . . . . . . . . .
Electromagnetic compatibility . . . . . . . . . . . .
Emission (CISPR 25) . . . . . . . . . . . . . . . . . . .
Conducted radio disturbance . . . . . . . . . . . . .
Radiated radio disturbance . . . . . . . . . . . . . .
Radiated disturbances (ISO 11452-1 third
edition (2005-02), ISO 11452-2, ISO 11452-4
and ISO 11452-5). . . . . . . . . . . . . . . . . . . . . .
14.2.1
Absorber lined shielded enclosure. . . . . . . . .
14.2.2
Bulk-current injection . . . . . . . . . . . . . . . . . . .
14.2.3
Strip line . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14.2.4
Immunity against mobile phones . . . . . . . . . .
14.3
Electrical transient transmission by capacitive
coupling [ISO 7637-3,
second edition (2007-07)] . . . . . . . . . . . . . . .
14.4
Electrical transient transmission by inductive
coupling [ISO 7637-3,
second edition (2007-07)] . . . . . . . . . . . . . . .
15
ElectroStatic Discharge (ESD) . . . . . . . . . . . .
15.1
Human body model (AEC-Q100-002) . . . . . .
15.2
Human metal model (ANSI/ESD SP5.6-2009)
15.3
Machine model (AEC-Q100-003). . . . . . . . . .
15.4
Charged-device model (AEC-Q100-011) . . . .
16
Application information . . . . . . . . . . . . . . . . .
17
Test information . . . . . . . . . . . . . . . . . . . . . . .
17.1
Quality information . . . . . . . . . . . . . . . . . . . . .
18
Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
Package outline. . . . . . . . . . . . . . . . . . . . . . . .
21
Handling information . . . . . . . . . . . . . . . . . . .
22
Solderability information . . . . . . . . . . . . . . . .
23
Revision history . . . . . . . . . . . . . . . . . . . . . . .
24
Legal information . . . . . . . . . . . . . . . . . . . . . .
24.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . .
24.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .
24.3
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . .
24.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . .
25
Contact information . . . . . . . . . . . . . . . . . . . .
26
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2014.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 24 February 2014
Document identifier: KMA215