W91570DN SERIES
Publication Release Date: May 1997
- 29 -
Revision A2
HKS
OFF HOOK
ON HOOK
HFO
H/P MUTE
CHIP ENBLE
Low
High
HFI
T/P MUTE
HOLD KEY
Figure 10(a). Hold and Handfree Timing Diagram
Note: The HOLD KEY cannot be enabled when the chip is disabled.
T/P MUTE
HFI
HKS
OFF HOOK
HFO
High
H/P MUTE
CHIP ENBLE
HOLD KEY
Figure 10(b). Hold and Handfree 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 activate inputs will be ignored.
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