FX828D2 CMLMICRO [CML Microcircuits], FX828D2 Datasheet - Page 22

• Manufacturer Part Number: FX828D2
• Description: CTCSS/DCS/SELCALL Processor
• Manufacturer: CMLMICRO [CML Microcircuits]

CTCSS/DCS/SELCALL Processor
1.6.6
This may be used in conjunction with the CTCSS/Selcall decoder to form part of the decode algorithm or
as a timer for any other purpose. It has an 8-bit value in the GENERAL PURPOSE TIMER Register ($8B)
set in units of 1msec, an IRQ FLAG in Bit 6 of the IRQ FLAG Register ($8F) and an IRQ MASK in Bit 6 of
the IRQ MASK Register ($8E).
1.6.7
The only functions that must operate as half duplex are:
All other functions are totally independent and therefore a full duplex CTCSS or full duplex SELCALL
along with many other combinations are possible.
© 2009 CML Microsystems Plc
General Purpose Timer (GPT)
Full Duplex Modes
DCS Tx
DCS Tx
CTCSS decode or SELCALL decode
or DCS Rx
or CTCSS Tx
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FX828