IC-TW14 Datasheet, PDF (21/33 Pages) IC-Haus GmbH – IC-PMX Companion Chip

iC-TW14
iC-PMX Companion Chip
Rev A1, Page 21/33
See DIAGNOSTIC MODES on page 26 for more infor-
mation. Registers DATA.2 – DATA.3 are not used in
SSI test mode.
SIN_RAW and COS_RAW Registers
SIN_RAW and COS_RAW are read-only registers con-
taining the raw (un-corrected) sine and cosine values
(respectively) calculated from reading the singleturn
Hall sensors in the iC-PMX.
Value
±32,767
SIN_RAW (0x40), COS_RAW (0x41)
Description
Raw Sin/cos calculation values in units of 0.1 kA/m
Table 34: SIN_RAW and COS_RAW Registers
SIN_OFS_RES and COS_OFS_RES are 2’s-comple-
ment numbers representing the remaining offset in the
SIN and COS signals respectively. SIN_OFS_COR
and COS_OFS_COR should be adjusted so that
SIN_OFS_RES and COS_OFS_RES are as close to
zero as possible.
SIN_OFS_RES and COS_OFS_RES are updated
once per input cycle (magnet revolution) based
on SIN and COS. This implies that changes to
GAIN_COR, SIN_OFS_COR, and COS_OFS_COR do
not have an immediate effect on SIN_OFS_RES and
COS_OFS_RES. The effect of updated correction val-
ues occurs at the end of the input cycle following the
update.
SIN_RAW and COS_RAW are 2’s-complement values
proportional to H0 – H2 and H3 – H1 repectively, as ex-
plained in Position of the Hall Sensors and Sensor Sig-
nal Processing in the iC-PMX datasheet. These values
are converted to units of 0.1 kA/m using the current val-
ues of the GAIN, TEMP, and VDD registers. See spec.
item 801 in the iC-PMX datasheet for more information.
SIN and COS Registers
SIN and COS are read-only registers containing the cor-
rected sine and cosine values (respectively) calculated
from reading the singleturn Hall sensors in the iC-PMX.
Value
±32,767
SIN (0x42), COS (0x43)
Description
Corrected Sin/cos calculation values
in units of 0.1 kA/m
Table 35: SIN and COS Registers
SIN_PEAK and COS_PEAK Registers
SIN_PEAK and COS_PEAK are read-only registers
containing the peak amplitude of the SIN and COS
values (respectively) calculated from reading the single-
turn Hall sensors in the iC-PMX.
SIN_PEAK (0x46), COS_PEAK (0x47)
Value
Description
0 – 65,535 Sin/cos peak amplitude in units of 0.01 kA/m
Table 37: SIN_PEAK and COS_PEAK Registers
SIN_PEAK and COS_PEAK are positive values calcu-
lated as
SIN_PEAK = Max(SIN) − Min(SIN)
COS_PEAK = Max(COS) − Min(COS)
over the last input cycle (magnet revolution).
SIN and COS are 2’s-complement numbers calculated ^{GAIN_COR should be adjusted so that the ratio of}
as
SIN_PEAK to COS_PEAK is a close to 1 as possible.
GAIN_COR
SIN_OFS_COR
SIN = SIN_RAW ·
+ AMP ·
16
160
COS_OFS_COR
COS = COS_RAW + AMP ·
160
SIN_OFS_RES and COS_OFS_RES Registers
SIN_OFS_RES and COS_OFS_RES are read-only reg-
isters containing the offset residue for the SIN and COS
values (respectively) calculated from reading the single-
turn Hall sensors in the iC-PMX.
SIN_OFS_RES (0x44), COS_OFS_RES (0x45)
Value
Description
±32,767 Sin/cos offset residue in units of 0.01 kA/m
AMP
AMP is a read-only register containing the vector ampli-
tude of the signals from the singleturn Hall sensors in
the iC-PMX.
Value
0 – 65,535
AMP (0x48)
Description
iC-PMX singleturn Hall sensor amplitude
in units of 0.1 kA/m
Table 38: AMP Register
A_√MP is a 16-bit positive integer value proportional to
SIN² + COS² which is filtered to provide a stable
value by eliminating changes less than 5%.
Table 36: OFS_RES Registers