IC-MD_17 Datasheet, PDF (25/30 Pages) IC-Haus GmbH – 48-BIT QUADRATURE COUNTER

iC-MD 48-BIT QUADRATURE COUNTE^pR^reliminary
WITH RS422 RECEIVER AND SPI/BISS INTERFACE
BiSS and SSI INTERFACE
Rev B1, Page 25/30
The BiSS interface is a bidirectional serial interface,
which is used to read out the sensor data values and to
write and read the internal configuration registers. For
a detailed description of the protocol, see the BiSS C
specification.
It consist of 3 configurable channels:
Channel
CH0
CH1
CH2
Notes
Data
AB counter
SPI Channel
UPD
TP1
TP1
TP2
Error
NERR
NERR
NABERR
NABERR
NABERR
NABERR
Warning
Data length CRC polynomial
NWARN
16 + 2 bit
1000011
24 + 2 bit (default)
32 + 2 bit
48 + 2 bit
NSPICHVAL
16 + 2 bit
1000011
24 + 2 bit
32 + 2 bit
48 + 2 bit
NUPDVAL
24 + 2 bit
100101
NTPVAL
24 + 2 bit
100101
NTPVAL
24 + 2 bit
100101
NTPVAL
24 + 2 bit
100101
channel 0 data length configurable via:
CNTCFG (Adr.0x00, bit 3:0)
CRC mode
inverted
inverted
inverted
inverted
inverted
inverted
Table 64: BiSS Channels
The error (NERR) and warning (NWARN) bit of the
channel 0 signal the same data to be output at the pins
NERR and NWARN, it’s by default:
All three channels are enabled supply data by default
configuration, but all of them can be disable with the
registers NENCH0 (table 66) and ENCHx (table 67)
NERR: ABERR (AB signal error)
NWARN: UPDVAL (UPD Reg. up to date)
This bits can also be configured like the NERR and
NWARN outputs, with the registers MASK (table 57)
and NMASK(table 58)
NENCH0
Code
0
1
Addr. 0x04; bit (2)
Function
BiSS channel 0 enabled
BiSS channel 0 disabled
Default = 0b0
Table 66: Disable BiSS Channel 0
Two different data can be selected for each channel,
register CHxSEL (table 65) selects the data to be trans-
mitted by the channels.
CHxSEL
Code
XX0
XX1
X0X
X1X
0XX
1XX
Addr. 0x04; bit (7,5,3)
Function
channel 0: AB counter data
channel 0: SPI data channel
channel 1: UPD data
channel 1: TP1 data
channel 2: TP1 data
channel 2: TP2 data
Default = 0b000
Table 65: BiSS Channel Selection
ENCHx
Code
X0
0X
Addr. 0x04; bit (6,4)
Function
BiSS channel 1 disabled
BiSS channel 2 disabled
Default = 0b00
Table 67: Enable BiSS Channel 1 and 2
N.B. With using BiSS protocol the device provides a
BiSS Profile ID 0x33 0x18 (0x33 in address 0x42 and
0x18 in address 0x43) that is a void "BiSS Profile ID".