Audio Processor
10
MX806A
➤
Figure 5: LMR Audio Processor Explanatory Block Diagram
5 Controlling Protocol
Control of the functions and levels within the MX806A LMR Audio processor is by a group of
Address/Commands and appended data instructions from the system microcontroller. The use of these
instructions is detailed in the following paragraphs and tables.
Command Assignment
Address/Command Binary
Command Data
Table
HEX
01
MSB
LSB
General Reset
Control Command
Mode Command
Mod. Levels Set
Volume Set
00000001
00010000
00010001
00010010
00010011
10
+
+
+
+
1 byte
1 byte
2 bytes
1 byte
2
3
4
5
11
12
13
Table 3: C-BUS Address/Commands
In “C-BUS” protocol the MX806A is allocated Address/Command values 10H and 13H. C-BUS Command
Mode, Modulation and Volume assignments, and data requirements are given in Table 3 and illustrated in
Figure 5.
Commands and Data are only to be loaded in the group configurations detailed since the “C-BUS” interface
recognizes the first byte after Chip Select (logic “0”) as an Address/Command.
Function or Level control data, which is detailed in Table 4, Table 5, Table 6, and Table 7, is acted upon at
the end of the loaded instruction
ꢀ1998 MX-COM, Inc.
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