IC-MU_17 Datasheet, PDF (28/66 Pages) IC-Haus GmbH – MAGNETIC OFF-AXIS POSITION ENCODER - POLE WIDTH 1.28MM

iC-MU MAGNETIC OFF-AXIS
POSITION ENCODER - POLE WIDTH 1.28MM
Serial interface
Configuring the data format and data length
Rev D1, Page 28/66
MODE_ST selects data
of Output Shift Register
MODE_ST=0x0
MSB
Internal Absolute Data
MT
37 37..29
MODE_ST=0x1
Internal FlexCount ® Data
37
MODE_ST=0x2
Internal Raw Data
37
BitOsUeleTc_tMedSbBy
LSB MSB
MT MPC
26..18 25..17
LSB MSB
MPC MAS
14 13
BitOsUeleTc_tLeSdBby
MSB
ABZ
17
MSB
NON
27
LSB MSB
NON MAS
16 15 14 13
LSB
MAS
0
LSB
ABZ
0
LSB
MAS
0
OUT_LSB
OUT_MSB
OUT_ZERO
MODEA
Output Shift Register
PA3 ^MSB
LSB 0
shift direction
0 ERR WRN _PA2
Figure 14: Determining the output data length
The structure of the output shift register is shown in
Figure 14. The abbreviation MT stands for the multiturn
data, MPC is short for the number of master periods in
bit, ABZ for the data whose resolution is specified by
the parameter RESABZ (Table 72), NON for the data
of the nonius track and MAS for the data of the master
track. The numbering of the user data starts at the
LSB with zero. OUT_MSB and OUT_LSB determine
which part of the user data is output by the output shift
register.
MODE_ST selects the type of user data to be output
through the output shift register.
MODE_ST(1:0) Addr. 0x12; bit 5:4
Code
Description
0x0
output absolute position
0x1
output position in user resolution*) (FlexCount®)
0x2
output raw-data of Master- and Nonius track**)
0x3
reserved
Note:
*) resolution defined by RESABZ (Table 72)
**) MPC must be ̸= 12
Data length = 14 + OUT_MSB - OUT_LSB + OUT_ZERO +
optional ERR/WRN (depending on MODEA)
There is an exception for the calculation of the output
data length. If parameter MPC=12, OUT_LSB = 0 and
OUT_MSB > 0x02 the number of output bits is given
by:
data_length_2 = OUT_MSB + OUT_ZERO + ERR/WRN (de-
pending on MODEA) - 2
MODEA(2:0)
Addr. 0x0B; bit 2:0
Function Error
Warning
low active high active low active
SPI
-
-
-
BiSS
✓
-
✓
SSI
-
-
-
SSI+ERRL ✓
-
-
SSI+ERRH -
✓
-
ExtSSI
✓
-
✓
high active
-
-
-
-
-
-
Table 34: Selection of output data
Table 35: MODEA: error/warning-bit within serial proto-
cols
The number of output bits is determined by parameters
OUT_MSB, OUT_LSB, OUT_ZERO and the error/warn- OUT_MSB configures the bit of the user data which is
ing bits (see Figure 14 and Table 35):
output as MSB at pin PA3.