iC-MR 13-BIT S&H SIN/COS
INTERPOLATOR WITH CONTROLLER INTERFACES
Rev A1, Page 34/44
SERIAL I/O INTERFACE: BiSS C
Configuration
The following parameters define the serial interface in
The serial I/O interface operates in BiSS C proto- BiSS C protocol:
col and allows sensor data to be output in repeated
cycles without any termination (data channels POS
and TMP). At the same time parameters can be ex-
changed through bidirectional register communication
(data channel CD).
NESSI
Addr 0x19, bit 4
Code
Protocol
Information
0
1
SSI
BiSS C
www.biss-interface.com
Depending on the configuration, the sensor data sup-
plied by iC-MR contains the cycle counter and interpo-
lation data (MT + ST) of up to 50 bits, a life counter
of up to 6 bits, two error bits (ERR and WARN), and
6 or 16 CRC bits (CRC). Another data channel can be
switched in to transmit the temperature data from the
12-bit A/D converter at a length of 16 bits. Registers
PROFILE and DEV_ID can be programmed separately
for the data channels.
Table 53: BiSS/SSI protocol selection
ENLC
Code
0
Addr. 0x19; bit 5
Function
R/W
R/W
R/W
No transmission of life counter
Transmission of 6-bit life counter
1
Table 54: Life counter enable
Single-cycle data channel: POS
Bits
Type
Label
TMPSCD
Addr. 0x19; bit 2
Function
0/12/24
24/26
1
DATA
DATA
ERROR
Multiturn data MT
Singleturn data ST
Code
0
1
No cyclic output of temperature value
Cyclic output of temperature value
Error bit nE (see ERR)
(inverted bit output)
1
ERROR
Error bit nW (see WARN)
(inverted bit output)
Table 55: Temperature data enable (BiSS)
0/6
DATA
CRC
Life counter LC
ENXCRC
Addr. 0x19; bit 3
Function
6/16
Polynomial 0x43 or 0x190D9
(inverted bit output)
Code
0
6-bit CRC with polynomial
0x43 = x6 + x1 + 1
Single-cycle data channel: TMP
Bits
16
5
Type
DATA
CRC
Label
1
16-bit CRC with polynomial
Temperature data TEMP
Polynomial 0x25 = x5 + x2 + 1
(inverted bit output)
0x190D9 = x16 + x15 + x12 + x7 + x6 + x4 + x3 + 1
Table 56: Selecting extended CRC
Table 52: BiSS data channels
Figure 23: Example of line signals (BiSS C)
ICHAUS [ IC-HAUS GMBH ]
