CMX865 CML Microcircuits, CMX865 Datasheet - Page 27

• Manufacturer Part Number: CMX865
• Description: FSK Modem and DTMF Codec
• Manufacturer: CML Microcircuits

FSK Modem and DTMF Codec
© 2005 CML Microsystems Plc
The IRQN output pin will be pulled low (to V
IRQNEN b6 of the General Control Register are both 1.
Changes to Status Register bits caused by a change of Tx or Rx operating mode can take up to
150µs to take effect.
In powersave mode or when the reset bit of the General Control Register is 1, the Ring Detect bit
continues to operate.
In Rx modem modes b2-1 will be zero and b0 will show the output of the frequency demodulator,
updated at 8 times the nominal data rate.
Figure 9b Operation of Status Register in DTMF Rx Mode
Figure 9a Operation of Status Register b10-5
27
SS
) when the IRQ bit of the Status Register and the
CMX865
D/865/3