W91590 Datasheet, PDF (16/20 Pages) Winbond – 24-MEMORY TONE/PULSE SWITCHABLE DIALER WITH HANDFREE, HOLD AND LOCK FUNCTIONS

W91590 SERIES
Timing Waveforms, continued
HKS
HFI
H KEY
HFO
OFF HOOK
ON HOOK
T/P MUTE
HPM MUTE
HIGH
LOW
CHIP ENBLE
Figure 3(a).
Note: The H KEY cannot be enabled when chip is disabled.
HKS
HFI
H KEY
HFO
OFF HOOK
T/P MUTE
HPM MUTE
HIGH
CHIP ENBLE
Figure 3(b).
Note: The HFI and HFI inputs will toggle the HFO signal; as soon as either HFI or H KEY is activated the HFO signal will go
high and previous inputs will be ignored.
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