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5.3 Control Data CD
For complete CD structure information please refer to the official BiSS documents: “Protocol description C-
mode”.
Main control data is described in the section below.
5.3.1 Register address
(7 bits)
This is the address of the register. It specifies the register you need to read from or write to.
5.3.2 RW
(2 bits)
It sets whether you need to write to register (
RW
= “01”) or to read from the register (
RW
= “10”).
RW
= “01”: when you need to write to the register
RW
= “10”: when you need to read from the register
5.3.3 DATA
(8 bits)
When writing to register (RW = “01”): this is the value to be set in the register (i.e. transmitted from the Master
to the Slave).
When reading from the register (RW = “10”): this is the value to be read in the register (i.e. transmitted from the
Slave to the Master).
Data bit structure:
bit
7
...
...
0
MSB
...
...
LSB
5.3.4 CRC
(4 bits)
CRC (Cyclic Redundancy Check) is the error checking field resulting from a “Redundancy Check” calculation
performed on the message contents. This is intended to check whether transmission has been performed
properly (inverted output).
Polynomial: X
4
+X
1
+1 (binary: 10011)
Logic circuit:
1st
stage
X
0
2nd
stage
X
1
3rd
stage
X
2
4th
stage
X
3
Input Data (starts from MSB)
Summary of Contents for MXS2
Page 1: ...Magnetic Scale MXS2 Manual...
