Lika MTA1, Руководство пользователя

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SMA1
CRC
(6 bits)
CRC, namely 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
6
+X
1
+1 (binary: 1000011)
Logic circuit:
7.4 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 this section.
Register address
(7 bits)
This is the address of the register; it specifies the register you need to read from
or write to.
RW
(2 bits)
It sets whether you need to write to the 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
DATA
(8 bit)
When writing to the 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).
MAN SMA1 E 2.9.odt 7 - BiSS C-mode interface 33 of 48
1st
stage
X
1
X
2
X
3
X
5
Input Data (starts from MSB)
X
0
2nd
stage
3rd
stage
4th
stage
5th
stage
6th
stage
X
4