EM91450 データシートの表示（PDF） - ELAN Microelectronics

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EM91450

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

ELAN Microelectronics 

EM91450 SERIES

TONE/PULSE DIALER WITH LCD INTERFACE

AND I.P.P. DETECT FUNCTION

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.

0

1

bit 0

bit1

bit2 bit3 bit4

bit5

ready

start bits

data bits

0

1

stop bits

∗ Keypad,SDO format and LCD display reference table:

Keypad

bit5

1

0

2

0

3

0

4

0

5

0

6

0

7

0

8

0

9

0

0

0

"*"/T

0

#

0

P

0

*/"T"

0

HOLD

1

HF

1

F

1

(Lock state)

1

RD

1

bit4 bit3

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

0

1

1

bit2 bit1

0

0

0

1

0

1

1

0

1

0

1

1

1

1

0

0

0

0

0

1

0

1

1

0

1

0

1

1

0

0

0

1

1

1

0

0

1

0

bit0

Display

1

1

0

2

1

3

0

4

1

5

0

6

1

7

0

8

1

9

0

0

1



0



1

P

0

0

HOLD

0

Speaker

1

clear all display

1

Lock

1

RD

<Note> : The display of LCD panel "Hold","HF","RD" is corresponding to EM32117 with flag types.

LOCK function

The EM91450 serial provides the LOCK function to inhibit toll dialing operation. Connecting a resistor on COL1

pin to VSS can select different LOCK control method that is conventional key lock or password lock. Also the

lock number that can be selected by connecting the resistors on COL2 or COL3 pin. After power on reset, the

password is fixed to 000 automatically. The lock function is disabled when the password is equal to 000 .

How to setup password

• Set LOCK function to password control mode. (Connects a resistor on COL1 pin to VSS)

• Off hook (or turn on HF function)

• Push : # , # , ops1 , ops2 , ops3 , nps1 , nps2 , nps3 , # . If the ops1~ops3 are the same with current password,

then nps1~np3 will be stored in the dialer to replace current password. Otherwise, the current password can

not be updated. All the numbers pressed in the password setup procedure can not be dialed out when current

password is not equal to 000. If the current password are equal to 000, then only the first number "#" will be

dialed out.

* This specification are subject to be changed without notice.

2.10.1999 8

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