CMX808A View Datasheet(PDF) - CML Microcircuits
Part Name
Description
MFG CO.
'CMX808A' PDF : 23 Pages View PDF
Family Radio CTCSS 'Type 2' Encoder and Decoder
CMX808A
The flow chart shows the tone cloning routine. The first programmed tone set ($0-$6) will decode after
typically 140ms, subsequent tone sets will decode almost instantly (i.e. the information is available at the
Reply Data Output in less than 100µs).
Note: $8X and $9C is the Hex address/command.
Program Bandwidth
Enable IRQ Mask
Enable Decoder
$80=$7D
Enable Tone
Cloning $9C=$01
Program Tones
($84) into
Addresses $0-$6
Wait for Interrupt
Read Status
Register ($81)
Is it a
Programmed
Yes
Tone?
No
Mask Interrupt
$80=$7C
Tone Decoded
Program Tones
($84) into
Addresses $0-$6
Read Status
Register ($81)
No
Is it a
Programmed
Tone?
Yes
Tone Decoded
Figure 4 Tone Cloning
© 1999 Consumer Microcircuits Limited
13
D/808A/5
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