EM91415 Ver la hoja de datos (PDF) - ELAN Microelectronics
Número de pieza
componentes Descripción
Fabricante
EM91415
ELAN Microelectronics
EM91415 Datasheet PDF : 25 Pages
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EM91415 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
Operating flow chart
HF
HF
1
On-hook State
HKS=Lo
HKS=Hi
4
On-hook
Hand-free State
HKS=Lo
2
Off-hook State
HKS=Hi
3
HF
HD
HF
Off-hook
HF
Hand-free State
HD
HD
6
HD
On-hook
Hold-line State
HF
HD
HKS=Hi
5
Off-hook
Hold-line State
HKS=Lo
<Note> : HF = Handfree
HD = Hold
Truth table
Operating state
(0) On-hook, idle state
HKS
H
Input/Output pin level
PO XMUTE
HFO
F
F
L
(1) Off-hook line
L
F
F
L
(2) Off-hook, HF line
L
F
F
H
(3) On-hook, HF line
H
F
F
H
(4) Off-hook, HD line
L
F
L
L
(5) On-hook, HD line
H
F
L
L
Note : F=floating (high impedance); H=logic “High”; L=logic “Low” level.
HDO
L
L
L
L
H
H
Music on Hold
EM91415 series built-in a melody generator to generate dual-tone music on DTMF output pin. The music is
designed for telephone line at line holding.
SDO (Serial Data Output) function
The SDO is serial data output which format is same as UART protocol. SDO function is designed to drive LCD
driver and voice synthesizer. So the dialing numbers can be display on LCD screen with EM32100 (or EM32116
). The SDO signal consists of two start bits, six data bits and two stop bits. Each bit time is about 3.9 ms (256 Hz)
and output sequences are following by start bits, data bits (LSB to MSB) and stop bits.
* This specification are subject to be changed without notice.
10.1.1997 8
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