EM91215 Datasheet, PDF (12/19 Pages) ELAN Microelectronics Corp – TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

EM91215 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
HKS
KEY IN
KT
XMUTE
PM
SDO
PO
DTMF
OSC.
2
RD/P
3
Tp
Tidp
Tidp
Figure 5. Pause key operating timing
Hi-impedance
HKS
KEY IN
KT
XMUTE
PM
SDO
PO
DTMF
OSC.
HKS
KEY IN
KT
XMUTE
PM
SDO
PO
DTMF
OSC.
2
*/T
3
4
Tpt
Figure 6. Pulse to Tone (P→T) operating timing
F
Tdb
Tf
Tfp=300ms
Figure 7. Flash key operating timing
* This specification are subject to be changed without notice.
Hi-impedance
Hi-impedance
10.1.1997 12