CMX838 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX838' PDF : 71 Pages View PDF
FRS/PMR446/GMRS Family Radio Processor
CMX838
4.2.4 Tone Signaling Processor Configuration Task Descriptions
Normal Run Mode
Reserved For Test
RX Configure
TX Configure
Initialize and Configure
Task ID
0
1, 2, 3
4
5
6
7
8
9
10
11
12
13
14
15
Task Description
Normal Operation
Special Test Functions
Enable/Disable Tone Detector
Program User Defined Subaudio Tone
Adjust Detector Band Width
Adjust No Tone Timer Duration
Select Sub-Audio Tone From Preprogrammed List
Program User Defined Subaudio Tone
Program Audio Frequency Ringing Tone
Program TX Timer
Enter Fast Initialization Mode
Quickly Enable/Disable Multiple Detectors
Configure Aux Pin as Output
Soft Reset
Argument Data In
N/A
N/A
$95
$8E
$8E
$8E
$95
$8E
$8E
$8E
N/A
$95
$95
N/A
Table 3: Tone Signaling Processor Initialization and Configuration Tasks
Tone signaling configuration tasks initialize the tone signaling processor. While the processor is running,
either generating or detecting tones (controlled by the TX/RX bit of register $80), configuration tasks can be
issued at a rate up to one per 250µs. The required argument register(s) should not be modified for at least
this time after issuing a task. Before issuing tasks that require argument data, first load the argument data in
the argument data register. Then load the desired task in the task field of the sub-audio general control
register. The Power control (i.e. enabled) and IRQ control (set however you want) should be logically OR’ed
with the desired task field to define the data to load in register $93. All C-BUS writes to the tone signaling
control register ($93), that enable (or keep enabled) the tone signaling processor, constitute issuing a task.
Before tasks are issued, the base band clocks must be setup.
4.2.4.1 Normal Run Mode (Task 0)
To place the device in Normal Run mode issue Task 0. In this mode, the tone signaling processor will either
encode or decode depending on the TX/RX bit of register ($80).
4.2.4.2 Reserved For Test (Task 1-3)
Do not issue tasks 1, 2 or 3 as these are reserved for test.
2003 CML Microsystems Plc
21
D/838/8
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