IC-MV Datasheet, PDF (17/28 Pages) IC-Haus GmbH – 8-BIT HALL ENCODER

iC-MV 8-BIT HALL ENCODER WITH
CASCADABLE SERIAL INTERFACE
preliminary
Rev B1, Page 17/28
MODE(2:0): Operating Mode
For testing of individual functions, several operating
modes are built in and can be selected via the MODE
register. In Mode Analog Output, Digital Test, Function
Test and Converter Test, a test voltage can be applied
to ADR0 and ADR1 alternatively to magnetic stimula-
tion. In this case, a sinus test voltage VTS is applied
to pin ADR0 and a cosine test voltage VTC is applied
to pin ADR1 with an amplitude of Vpp(VTS, VTC) of
0.1 V .. 4.5 V.
Output signals according to operating mode
Operating Mode MODE(2:0) Pin
Pin
ADR0 ADR1
Normal Operation 0x00 ADR0 ADR1
Adjustment
0x01 ADR0 ADR1
Analog Out
0x02 VTS
VTC
Digital Test
0x03 VTS
VTC
Function Test
0x04 VTS
VTC
Threshold Test
0x05 ADR0 ADR1
Converter Test
0x06 VTS
VTC
ABZ Operation
0x07 ADR0 ADR1
Pin
SLI
SLI
SLI
NSIN
VREF
SLI
SLI
A
A
Pin
SCLK
SCLK
SCLK
PSIN
GAIN
SCLK
SCLK
B
B
Pin Pin
SLO SDA
SLO SDA
SLO SDA
PCOS SDA
CLK 0
SLO SDA
STOUT SDA
Z
SDA
Z
SDA
Table 16: Operating Modes
Pin
SCL
SCL
SCL
SCL
0
SCL
SCL
SCL
SCL
Pin
NERR
NERR
GAIN
NCOS
NERR
NERR
NERR
NERR
NERR
• Normal Operation
If MODE is programmed to 0x00, iC-MV runs in nor-
mal operation. iC-MV is addressed via ADR(1:0). The
position data can be read via the pin SLO and the pin
NERR is configured as standby enable. The signal
feed occurs magnetically.
• Function Test
In MODE = 0x04, signals are fed in via ADR1 and
ADR0 just like in MODE = 0x02. The function test has
the same feature as the normal operation, however,
the signal feed occurs electrically. In this test opera-
tion e.g. the interpolator can be tested.
• Adjustment
MODE = 0x01 is used for adjustment. Thereby the
automatic gain control’s signal gain is output as volt-
age at the pin NERR. This process can be used as
a distance control. The pull-up resistor should be
switched off via the ENPU bit.
• Analog Out
With MODE = 0x02, sine and cosine voltage signals
Vpp(VTS, VTC) can be introduced to the Hall sen-
sors via the pins ADR1(VTC) and ADR0(VTS). The
required offset signal is first measured at ADR1 and
ADR0. In analog out operation the sine/cosine signals
are made available in front of the interpolator at the
pins SLI, SCLK, SLO, and NERR.
• Threshold Test
MODE = 0x05 can be used to test the input circuit
threshold. NOSBY bit has to be programmed to
0x0 so that the NERR pin is configured as an input.
In this operating mode, the threshold of the pins is
tested. The input pins’ thresholds can be determined
at STOUT.
• Converter Test
With MODE = 0x06 the converter test is activated.
Sine and cosine voltage signals are introduced via
ADR1 and ADR0 and the incremental signals are
output at SLI, SCLK, and SLO.
• Digital Test
For testing the saturation voltage, pins SDA and SCL
are set to ’lo’ in MODE = 0x03. The oscillator clock,
V(Vref) and the gain signal are made available. CLK,
gain and VREF can be measured in the digital test.
The gain signal can be monitored when applying the
VTS and VTC voltages.
• ABZ Operation
MODE = 0x07 has the same function as the normal
operation. The position output occurs incrementally at
pins SLI, SCLK, and SLO. NOSBY bit has to be pro-
grammed to 0x1 so that the NERR pin is configured
as an output.