em91450 ELAN Microelectronics Corp, em91450 Datasheet - Page 15

• Manufacturer Part Number: em91450
• Description: Tone/pulse Dialer With Lcd Interface And I.p.p. Detect Function
• Manufacturer: ELAN Microelectronics Corp

* This specification are subject to be changed without notice.
XMUTE
KEY IN
KEY IN
XMUTE
DTMF
HKS
DTMF
OSC.
SDO
OSC.
HKS
XMUTE
SDO
KEY IN
KT
PO
KT
PO
DTMF
HKS
OSC.
SDO
KT
PO
Tdb
2
Figure 6. Pulse to Tone (P T) operating timing
F
2
Tidp
Figure 5. Pause key operating timing
Figure 7. Flash key operating timing
Tf
*/T
RD/P
Tfp=300ms
Tpt
Tp
3
3
TONE/PULSE DIALER WITH LCD INTERFACE
Tidp
AND I.P.P. DETECT FUNCTION
4
Hi-impedance
Hi-impedance
EM91450 SERIES
Hi-impedance
2.10.1999
15