IC-NQC_13 Datasheet, PDF (19/30 Pages) IC-Haus GmbH – Sin/D CONVERTER WITH SIGNAL CALIBRATION

iC-NQC
13-bit Sin/D CONVERTER WITH SIGNAL CALIBRATION
I/O INTERFACE: BiSS C PROTOCOL
Rev D3, Page 19/30
The serial I/O interface operates in BiSS C protocol
mode and enables sensor data to be output in uninter-
ruptible cycles (data channel SCD). At the same time
parameters can be exchanged via bidirectional register
communication (data channel CD).
The sensor data produced by iC-NQC contains the an-
gle value (S) with 3 to 13 bits, the period count (P) with
0, 8, 12 or 24 bits, two error bits (E1 and E0) and 5 or
6 CRC bits (CRC).
Interface Parameters With BiSS C Protocol
SELSSI
Code
0
1
Adr 0x02, Bit 6
Protocol
BiSS C
SSI
Information
www.biss-interface.com
Table 33: Protocol version
Figure 16: Example line signals (BiSS C)
Single Cycle Data Channel: SCD
Bits
Typ
Label
0...24
DATA
Period counter P(23:0):
0, 8, 12, 24 bit (multiturn position)
3...13
DATA
Angle data S(12:0):
3 bis 13 bit (singleturn position)
1
ERROR Error bit E1 (amplitude error)
1
ERROR Error bit E0 (frequency error)
5...6
CRC
Polynomial 0x25
x⁵ + x² + x⁰ (inverted bit output)
- oder -
Polynomial 0x43
x⁶ + x¹ + x⁰ (inverted bit output)
Table 32: BiSS data channels
TIMO
Code
0
1
TOA
0
1
Notes
Adr 0x06, Bit 5
Clock
Timeout t_tos fclk(MA) min*
46-47
ca. 20 µs
50 kHz
3-4
ca. 1.5 µs
660 kHz
Addr 0x07, Bit 3
see TIMO
adaptive with
T_CLK =
42/fosc
see BiSS
specification
50 kHz
A
ref.
clock
count
is
equal
to
32
fosc
(see
El.
Char.,
A02).
The permissible max. clock frequency is specified
by E06.
*) A low clock frequency can reduce the permissible
maximum input frequency since conversion is
paused for one MA cycle from Latch onwards.
Table 34: Timeout configuration (protectable)
M2S
Code
0x00
0x01
0x02
0x03
Adr 0x00, Bit 6:5
Data Length
-
P(7:0)
P(11:0)
P(23:0)
CRC Polynomial
0x25 (with CRC6 = 0)
0x25 (with CRC6 = 0)
0x43
0x43
Table 35: Period counter output
CRC6
Code
0
1
Adr 0x03, Bit 7
CRC Polynomial
determined by M2S
0x43
Status Messages
E1, E0
nE, nW
Table 36: CRC Polynomial and status messages