CMX838D1 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX838D1' PDF : 70 Pages View PDF
FRS/PMR446/GMRS Family Radio Processor
25
CMX838 Advance Information
4.2.4.5.2 Quickly Enable/Disable Multiple Detectors (Task 13)
Issuing task 13 places the tone signaling processor in a mode that allows multiple detectors to be to be
quickly configured. Like for task 12 neither the tone encoders nor the decoders run in this mode. The
argument data is defined as for task 4. This mode reverts to Fast Initialization Mode when any other task is
issued. To return to normal running mode issue task 0. The following example shows how to enable only
Tone detectors 1, 7, 10, 12, 18, and 20. Multiple calls to Task 4 can accomplish this, but would require more
C-BUS transactions and waiting 250µs after each task 4 call, but could allow the tone decoders to continue to
run.
// to disable all tone detectors and enter mode to quickly enable multiple detectors
$95 0x3F
$93 0x4D
// value = 0x80 | 0x0D
wait 250µs
$95 0x81
$95 0x87
$95 0x8A
$95 0x8C
$95 0x92
$95 0x94
// to ensure device runs Task 13
// to enable tone detector 1 (67.0 Hz) value = 0x80 | 0x01
// to enable tone detector 7 (82.5 Hz)
// to enable tone detector 10 (91.5 Hz)
// to enable tone detector 12 (97.4 Hz)
// to enable tone detector 18 (118.8 Hz)
// to enable tone detector 20 (127.3 Hz)
// to place device back in normal running mode
$93 Power Control + IRQ Control + Task 0
4.2.4.5.3 Configure Aux Pin as Output (Task 14)
Task 14 can be used to select and enable various digital outputs at the AUX pin. Load the argument data in
register $95 then issue the task.
The argument data has the following format in the 8 bit task data register ($95).
Bit 7
Bit 6-3
1=enable aux
pin as output
0=enable aux
pin as input
Don’t care
Bit 2-0 (These bits are Don’t Care if Bit 7 is a logic 0)
Bit 2
1
1
1
1
Bit 1
0
0
1
1
Bit 0
0
1
0
1
AUX output signal
RX Decode Status bit
Audio Frequency Ringing Tone
Output logic 0
Output logic 1
For example to have the device produce a 620Hz ringing tone frequency set up the ringing frequency with
task 10 then enable the output with task 14. Note that once the Audio Ringing Generator is enabled the
frequency can be changed by reissuing task 10.
$8E 0x0986
$93 0x4A
// 620 Hz
wait 250µs
$95 0x85
$93 0x4E
wait at least 250 µs
$8E 0x06C2
$93 0x4A
// 440 Hz
¤2001 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480221.002
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
Share Link: 
