IC-MU150 Datasheet, PDF (33/64 Pages) IC-Haus GmbH – MAGNETIC OFF-AXIS POSITION ENCODER - POLE WIDTH 1.50MM

iC-MU150 MAGNETIC OFF-AXIS
POSITION ENCODER - POLE WIDTH 1.50MM
sensor/actuator data channels can be switched on and
off with data bytes following the OPCODE.
After startup of iC-MU150 RACTIVE and PACTIVE is
set to 1.
NCS
SCLK
MOSI
MISO
OP
RAPA 0-3 RAPA 4-7
...
OP
8 cycles
Figure 21: Set ACTIVATE: RACTIVE/PACTIVE
(several slaves)
NCS
SCLK
MOSI
MISO
Rev B1, Page 33/64
OP
1 0 0 0 0 0 RA0 PA0
OP
00
100000
MOSI
MISO
OP
1 0 0 0 RA0 PA0 RA1 PA1
OP
00001000
8 cycles
RACTIVE/PACTIVE-vector
Figure 22: Set ACTIVATE: RACTIVE/PACTIVE
(Example with one and two slaves (daisy
chain))
The ACTIVATE command resets the bits FAIL, VALID,
BUSY, and DISMISS in the SPI-STATUS byte (see Ta-
ble 53).
RACTIVE
Code
0
1
Note
Description
Register communication deactivated
Register communication activated*)
*) default after startup
Table 50: RACTIVE
If RACTIVE is not set, on commands Read REGISTER
(single), Write REGISTER (single), REGISTER sta-
tus/data the ERROR bit is set in the SPI-STATUS byte
(see Table 53) to indicate that the command has not
been executed. At MISO the slave immediately outputs
the data transmitted by the master via MOSI.
PACTIVE
Code
0
1
Note
Description
Sensor data channel deactivated
Sensor data channel activated*)
*) default after startup
Table 51: PACTIVE
If PACTIVE is not set, on commands SDAD status
and SDAD transmission the ERROR bit is set in the
SPI-STATUS byte (see Table 53) to indicate that the
command has not been executed. At MISO the slave
immediately outputs the data transmitted by the master
via MOSI.
An example for a daisy chain wiring of 2 SPI slaves
is given in Figure 23. In order to do register commu-
nication (Read REGISTER (single), Write REGISTER
(single), REGISTER status/data) with e.g. slave (1)
the register communication has to be enabled explicitly
for this slave and disabled for slave (0) with command
ACTIVATE and parameter RACTIVE.
SCLK
NCS
SPI
Master
MOSI
MISO
iC-MU150
MOSI
MISO
(1)
iC-MU150
MOSI
MISO
(0)
Figure 23: Example configuration with 2 Slaves
(daisy chain)
SPI interface: Command SDAD transmission
iC-MU150 latches the absolute position on the first ris-
ing edge at SCLK, when NCS is at zero (REQ/LATCH).
Because iC-MU150 can output the sensor data (SD)
immediately, the master can transmit the SDAD trans-
mission command directly. The sensor data shift reg-
ister (the size of which is 8 to 40 bits in multiples of 8
using iC-MU150) is switched and clocked out between
MOSI and MISO.
If only one slave is connected up with one register and If invalid data is sampled in the shift register, the ER-
one sensor data channel, it must be ensured that the ROR bit is set in the SPI-STATUS byte (see Table 53)
RACTIVE and PACTIVE bits come last in the data byte. and the output data bytes are set to zero.