IC-MB3 Datasheet, PDF (24/26 Pages) IC-Haus GmbH – BiSS INTERFACE MASTER, 1-Chan./3-Slaves

iC-MB3
BiSS INTERFACE MASTER, 1-Chan./3-Slaves
APPLICATION HINTS
Example system: iC-MB3 with two interpolators iC-NQ
Rev D1, Page 24/26
Figure 13: Example configuration
Figure 14: Example BiSS device description file in XML
Assumptions:
Sensor 1:
Sensor 2:
iC-MB3 clock:
iC-NQ with angle resolution 8,192:
13 bit angle data, 2 error bits, CRC polynomial 10 0101b and inverted output,
Timeout_SENS: 2,62 µs
iC-NQ with angle resolution 1,024 and period counting:
8 bit period counter data plus 10 bit angle data, 2 error bits,
CRC polynomial 10 0101b and an inverted output;
Timeout_SENS: 2,62 µs
20 MHz (according to the electrical characteristics in the data sheet)
Setting the master clock for sensor mode: max. 10 MHz
Setting the master clock for register mode: max. 250 kHz
=> FREQ(4:0) = 00000b (10 MHz)
=> FREQ(7:5) = 101b (156 kHz)
Setting the cycle time for the automatic sensor data request:
without transmission delays and processing times =>
cycle time = (3+ (15+6+1) + (20+6+1) ) clock pulses +Timeout_SENS
= 52*0,1µs + 2,62µs = 7,82µs .156 * t_CLK
AutoGetSens time > cycle time => FREQAGS $ 7