W91510DN Datasheet, PDF (21/30 Pages) Winbond – TONE/PULSE DIALER WITH RTC AND LCD DISPLAY FUNCTION

Preliminary W91510DN SERIES
Timing Waveforms, continued
HKS
HFI
HOLD KEY
HFO
T/P MUTE
H/P MUTE
CHIP ENBLE
OFF HOOK
High
Figure 8(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.
HKS
HFI
HOLD1 KEY
HFO
T/P MUTE
H/P MUTE
CHIP ENBLE
ON HOOK
High
Figure 8(c). Hold and Handfree Timing Diagram
Note: Changing the state of the HKS signal from high to low will initialize the HFO and H/P MUTE signals.
- 21 -
Publication Release Date: May 1997
Revision A2