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.
1
0
1
bit 0
bit2
data bits
bit3
bit4
bit5
0
bit1
stop bits
start bits
ready
Keypad,SDO format and LCD display reference table:
Keypad
bit5
bit4
bit3
bit2
bit1
bit0
Display
1
0
0
0
0
0
1
1
2
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
1
0
0
1
1
1
1
0
0
0
0
1
1
1
0
0
1
0
1
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
1
1
1
2
3
4
5
6
7
8
9
0
3
4
5
6
7
8
9
0
"*"/T
#
P
P
*/"T"
HOLD
HF
HOLD
Speaker
clear all display
F
(Lock state)
RD
Lock
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
ELAN [ ELAN MICROELECTRONICS CORP ]
