W91550DN SERIES
Timing Waveforms, continued
HKS
HFI
HOLD KEY
HFO
T/P MUTE
HPM MUTE
CHIP ENBLE
OFF HOOK
High
Figure 10(b). Hold Timing Diagram
Note: The HFI and HOLD KEY inputs will toggle the HFO signal; as soon as either HFI or HOLD KEY is activated, the HFO
signal will go high and previous activated inputs will be ignored.
HKS
HFI
HOLD KEY
HFO
T/P MUTE
HPM MUTE
CHIP ENBLE
ON HOOK
High
Figure 10(c). Hold Timing Diagram
Note: Changing the state of the HKS signal from high to low will initialize the HFO and HPM MUTE signals.
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Publication Release Date: November 1997
Revision A3