EM91465 查看數據表（PDF） - ELAN Microelectronics

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产品描述 (功能)

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EM91465

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION

ELAN Microelectronics 

EM91465 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

AND I.P.P. DETECT FUNCTION

Operating flow chart

HF

HF

HF

XMUTE =Hi

(1)

On-hook State

XMUTE=Lo

HKS=Lo

HKS=Hi

(7)

IPP State

HKS=Lo

(4)

On-hook

Hand-free State

HKS=Lo

(2)

Off-hook State

HKS=Hi

(3)

Off-hook

HF

HF

HD

HD

HF

Hand-free State

HD

(6)

HD

On-hook

Hold-line State

HKS=Hi

HF

HD

(5)

Of f-hook

Hold-line State

HKS=Lo

<Note> : HF = Handfree

HD = Hold

Truth table

Operating state

(1) On-hook, idle state

Input

HKS

H

I/O

XMUTE

H/F

Pin level

PO

F

Output

HFO

L

HDO

L

DTMF

-

(2) Off-hook line

L

H/F

F

L

L

-

(3) Off-hook, HF line

L

H/F

F

H

L

-

(4) On-hook, HF line

H

H/F

F

H

L

-

(5) Off-hook, HD line

L

L/L

F

L

H

-

(6) On-hook, HD line

H

L/L

F

L

H

-

(7) IPP state

H

L/L

F

H

H

active

Note : F=floating (high impedance); H=logic “High”; L=logic “Low” level.

XMUTE are I/O port, so Input will effect state situation change, and which state dialer stay will

effect output level.

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 EM32117

). The SDO signal consists of two start bits, six data bits and two stop bits. The 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.

0

1

bit 0

bit1

bit2 bit3 bit4

bit5

ready

start bits

data bits

* This specification are subject to be changed without notice.

0

1

stop bits

9.24.1998 8

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