EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
HKS
2
KEY IN
Tdb
KT
SDO
b2 b3 b4
Tbit
SPB
1
0
b1
1
b5 SPB
b0
SB
SB
0
0
0
0
0
0
0
1
M
L
Hi-impedance
<Note>L=Least significant bit,M=Most significant bit, SB=START bit , SPT=STOP bit
Figure 8. SDO operating timing
HKS
HD
HD
HD
HD
HD
HD @
HF
HF
HF
KEY IN
HFO
93
ms
Thdrdb
HDO
XMUTE
SDO
PO
MELODY
Hi-impedance
@ : It can be triggled by extension telephone set for hold function release
Figure 9. HF and HD operating timing
HFI
or
HF
HKS
5
0
KEY
KT
Tdly
OSC.
"0" digit dialing time
SDO
Hi-impedance
Figure 10. Off-Hook delay time
* This specification are subject to be changed without notice.
2.10.1999 16
ELAN [ ELAN MICROELECTRONICS CORP ]
