IC-TW28 Datasheet, PDF (52/80 Pages) IC-Haus GmbH – 10-BIT SIN/COS INTERPOLATOR

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Rev D2, Page 52/80
ADAPT_CFG1
ADAPT_CFG1 is the other static register used to con-
figure auto adaption.
ADAPT_CFG1.p sets the auto adaption rate.
Value
0
1
ADAPT_CFG1.xcalee (0x4003 Bit 5)
Description
Configuration values not stored to EEPROM when
xCALIB deactivated
Configuration values stored to EEPROM when xCALIB
deactivated
Table 104: xCALIB Storage Function
Value
0
1
2
3
4
5
6
7
ADAPT_CFG1.p (0x4003 Bits 2:0)
Description
1/32 increment per sin/cos input period
1/16 x error per sin/cos input period
1/8 x error per sin/cos input period
1/4 x error per sin/cos input period
1/2 x error per sin/cos input period
Reserved (do not use)
1 increment per sin/cos input period
Reserved (do not use)
Table 101: Adaption Rate
SC_AMP_TARG
SC_AMP_TARG is a sta_√tic register used to set the de-
sired sensor amplitude sin² + cos² value (target) for
sin/cos gain calibration.
Value
0 – 180
150
181 – 255
SC_AMP_TARG (0x4004)
Description
Min. – max. sin/cos amplitude target
Recommended sin/cos amplitude target
Reserved (do not use)
Table 105: Sin/Cos Amplitude Calibration Target
Higher ADAPT_CFG1.p values result in faster adaption
and calibration. Lower ADAPT_CFG1.p values require
more input cycles for calibration.
ADAPT_CFG1.stop determines whether or not auto
adaption continues when the sensor input amplitude is
out of range.
SC_AMP_LOW
SC_AMP_LOW is a static register used to set the low
limit for the sin/cos amplitude monitor and LED intensity
control during operation.
Value
0 – 180
181 – 255
SC_AMP_LOW (0x4005)
Description
Min. – max. sin/cos amplitude low limit
Reserved (do not use)
Value
0
1
ADAPT_CFG1.stop (0x4003 Bit 3)
Description
Auto adaption always active
Auto adaption stopped when STAT_VAL.scamp = 1
Table 102: Adaption Fault Mode
Table 106: Sin/Cos Amplitude Low Limit
During operation, STAT_VAL.scamp is active whenever
SC_AMP < SC_AMP_LOW. See Sin/Cos Amplitude
Monitor on page 62 and LED Intensity Control on page
72 for more information.
ADAPT_CFG1.zcal determines whether or not the Z
channel is calibrated when pin xCALIB is active.
Value
0
1
ADAPT_CFG1.zcal (0x4003 Bit 4)
Description
Sin/cos calibration only when xCALIB active
Sin/cos and Z calibration when xCALIB active
Table 103: Auto Z Calibration
SC_AMP_HIGH
SC_AMP_HIGH is a static register used to set the high
limit for the sin/cos amplitude monitor and LED intensity
control during operation.
Value
0 – 180
181 – 255
SC_AMP_HIGH (0x4006)
Description
Min. – max. sin/cos amplitude high limit
Reserved (do not use)
Table 107: Sin/Cos Amplitude High Limit
Disable Z calibration (ADAPT_CFG1.zcal = 0) if the
ZERO inputs are not used.
ADAPT_CFG1.xcalee determines whether or not the
calibrated correction values are stored to the internal
EEPROM when pin xCALIB is deactivated.
During operation, STAT_VAL.scamp is active whenever
SC_AMP > SC_AMP_HIGH. See Sin/Cos Amplitude
Monitor on page 62 and LED Intensity Control on page
72 for more information.