IC-TW28 Datasheet, PDF (51/80 Pages) IC-Haus GmbH – 10-BIT SIN/COS INTERPOLATOR

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Rev D2, Page 51/80
before executing this command. See TEST on page 40
for more information.
Command 0x20 stops auto calibration initiated by com-
mand 0x21, 0x22, or 0x23.
Command 0x21 initiates auto calibration of the sin/cos
offset, gain, balance, and phase correction parameters.
This command must be manually terminated after cali-
bration is complete by writing 0x20 to the COMMAND
register. Command 0x11 or 0x17 can then be used to
store the calibrated values to EEPROM.
Command 0x22 initiates auto calibration of the Z chan-
nel offset, gain, and phase correction parameters. This
command must be manually terminated after calibration
is complete by writing 0x20 to the COMMAND register.
Command 0x11 or 0x17 can then be used to store the
calibrated values to EEPROM.
Command 0x23 initiates auto calibration of the sin/cos
offset, gain, balance, and phase correction parame-
ters, as well as the Z channel offset, gain, and phase
correction parameters. This command must be manu-
ally terminated after calibration is complete by writing
0x20 to the COMMAND register. Command 0x11 or
0x17 can then be used to store the calibrated values to
EEPROM.
See Startup Modes on page 58 for more information.
START.nostart determines whether or not interpolation
starts automatically at startup.
Value
0
1
START.nostart (0x4001 Bit 5)
Description
Start interpolation at startup
Do not start interpolation at startup
Table 99: Interpolation Startup
Inhibiting interpolation at startup is useful in hosted
applications to allow the host processor to control inter-
polation startup.
ADAPT_CFG0
ADAPT_CFG0 is one of the two static registers used to
configure auto adaption.
ADAPT_CFG0 (0x4002)
Bit
Name
Description
0
scofs
S/C Offset adaption
1
scbal
S/C Balance adaption
2
scph
S/C Phase adaption
3
scofsa S/C Analog offset adaption
4
scgain S/C Gain adaption
5
zofs
Z Offset adaption
6
zgain
Z Gain adaption
7
zphase Z Phase adaption
START
START is a static register used to set the startup wait
time and the startup mode.
Value
0
1
2
3
4
5
6
7
START.wait (0x4001 Bits 2:0)
Startup Wait Time
2 ms
2.5 ms
4 ms
10 ms
34 ms
130 ms
514 ms
Reserved (do not use)
Table 100: Auto Adaption Configuration
Sin/cos analog offset and gain adaption as well as all
Z channel adaption are meant to be used only for ini-
tial calibration and not during operation. It is therefore
recommended to set ADAPT_CFG0 ≤ 7.
Table 97: Startup Wait Time
START.mode determines how the AB and Z outputs
behave at startup.
Value
0
1
2
3
START.mode (0x4001 Bits 4:3)
Description
Relative startup mode
Same phase startup mode
Absolute burst startup mode
Reserved (do not use)
Table 98: Startup Mode