W91590 Datasheet, PDF (17/20 Pages) Winbond – 24-MEMORY TONE/PULSE SWITCHABLE DIALER WITH HANDFREE, HOLD AND LOCK FUNCTIONS

W91590 SERIES
Timing Waveforms, continued
HKS
HFI
H KEY
HFO
ON HOOK
T/P MUTE
HPM MUTE
CHIP ENBLE
HIGH
Figure 3(c).
Note: Changing the state of the HKS signal from high to low will initialize the HFO and HPM MUTE signals.
HKS
LOW
KEY IN
DP
R
TKID
TRB
TIDP
TPDP
TIDP
T/P MUTE
HPM MUTE
KT
DTMF
OSC.
TFKP
LOW
OSCILLATION
Figure 4. Pulse Mode One-key Redialing Timing Diagram (when not first key)
- 17 -
Publication Release Date: July 1995
Revision A3