EM91440 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
HKS
2
RD/P
3
KEY IN
KT
XMUTE
Tp
HDO
SDO
PO
DTMF
OSC.
Tidp
Tidp
Hi-impedance
Figure 5. Pause key operating timing
HKS
2
*/T
3
4
KEY IN
KT
XMUTE
Tpt
HDO
SDO
PO
DTMF
OSC.
Hi-impedance
Figure 6. Pulse to Tone (P→T) operating timing
HKS
F
KEY IN
Tdb
KT
XMUTE
HDO
SDO
PO
DTMF
OSC.
Tfp=300ms
Tf
Hi-impedance
Figure 7. Flash key operating timing
10.1.1997
* This specification are subject to be changed without notice.
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