W91F820N Datasheet, PDF (17/20 Pages) Winbond – 13-FLASH MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS

Preliminary W91F820N SERIES
Timing Waveforms, continued
HKS
KEY IN
DP
T/P MUTE
H/P MUTE
KT
DTMF
OSC.
CHIP ENABLE
T_KID
<300 mS
T_OFD
T
4
T<T OHD
M
B
T PDP
TIDP
T FKD
LOW
OSC.
ON HOOK
Figure 4 Lock Function Timing Diagram
T OFD
OSC.
T OHD
HKS
KEY IN
DP
T/P MUTE
H/P MUTE
KT
DTMF
OSC.
OKR
T_RB
T_KID
LOW
M
T_RP
B
T_IDP
T_IDP
T_PDP
T_PDP
LOW
OSC.
Figure 5 Pulse Mode One-key Dedialing Timing Diagram (without lock)
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Publication Release Date: January 1999
Revision A1