EM91450
SERIES
EM91450
SERIES
TONE/PULSE
DIALER
WITH
LCD
INTERFACE
TONE/PULSE
DIALER
WITH
LCD
INTERFACE
AND I.P.P.
DETECT
FUNCTION
AND I.P.P.
DETECT
FUNCTION
GENERAL DESCRIPTION
The EM91450 is a series of tone/pulse switchable dialers that is composed of T/P dialer. The EM91465 provide
modern LCD driver's series data output port, which can display modern function operating icons. The
EM91450 series provide necessary functions of telephone set for application in any environment, such as Pulse
dialing, Tone (DTMF) dialing, Handfree dialing, keying tone ,and lock functions. The lock function is designed
to inhibit toll dialing operation. Beside this, ring detector and SDO (Serial Data Output) functions are provided
in advance version. Ring detector can prevent illegal dialing from pocket dialer. The SDO is designed to drive
LCD driver and voice synthesizer. In this application, the dialing numbers and modern function operating icons
can be displayed on LCD screen with LCD driver (EM32100 or EM32117 ). The EM91450 has a special I.P.
P. detect function (Illegal Parallel Phone Detect) can prevent the illegal connect external Phone. The I.P.P. will
detect the illegal user. When illegal user pickup phone, the function will alarm and send the alarm signal to the
telephone line to interfer the illegal dialing.
FEATURES
• I.P.P. detect function prevents the illegal connect external phone.
• SDO function supports LCD driver and voice synthesizer to indicate dialing numbers and function operating icons.
• Lock function provides conventionality key lock and password lock operations.
• Ring detector is designed to prevent illegal dialing from pocket dialer.
• Line hold function is designed for stopping conversation temporality.
• Tone/Pulse switchable.
• Wide operating voltage from 2.0 V to 5.5 V.
• Low operating current, 0.15 mA (Pulse) and 0.3 mA (Tone) typically.
• Adding resistor on keyboard scan pin that can select many telephone specifications, such as : Pulse rate,
M/B ratio, Flash time, lock dialing functions.
• 13 set one touch or (3 set one touch and 10 set two touch) repertory memory, each one can hold data up to
16 digits.
• A 32-digit LNB (last number) redial memory.
• Keytone function provides rapidly keying recognition.
• Handfree function provides on-hook dialing and speakerphone application.
• Pause and P-T time are fixed to 3.6 seconds.
• Tone duration and inter-tone pause time are fixed to 98 ms.
• Using 3.579545 MHz crystal or ceramic resonator.
• Package forms: PDIP, skinny.
ORDERING INFORMATION
Versions list and function outline
VERSION
LNB
KT
HOLD
I.P.P.
EM91450A
√
√
√
EM91450B
√
√
√
EM91450C
√
√
√
√
EM91450D
√
√
√
√
Note : PDP = Pocket Dialer Prevented
: I.P.P. detect=Illegal Parallel Phone Detect.
* This specification are subject to be changed without notice.
LOCK
√
√
√
√
HF
SDO(LCD)
PDP
√
√
√
√
√
√
2.10.1999
1
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
EM91450
Pin Assignment
EM91450BP
EM91450AP
COL4/KT
COL3
COL2
COL1
XIN
XOUT
XMUTE
VSS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
18
17
16
15
14
13
12
11
10
PO
ROW4
ROW3
ROW2
ROW1
HKS
VDD
DTMF
HFO
EM91450DK
EM91450CP
SDO
COL4/KT
COL3
COL2
COL1
XIN
XOUT
XMUTE
VSS
HFI
1
2
3
4
5
6
7
8
9
COL4/KT
COL3
COL2
COL1
XIN
XOUT
XMUTE
VSS
HFI
PO
ROW4
ROW3
ROW2
ROW1
HKS
VDD
DTMF
SDO
COL4/KT
COL3
COL2
COL1
XIN
XOUT
XMUTE
VSS
HFI
DRING
HDO
PO
ROW4
ROW3
ROW2
ROW1
HKS
VDD
DTMF
HFO
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
HDO
PO
ROW4
ROW3
ROW2
ROW1
HKS
VDD
DTMF
HFO
RMUTE
Keyboard Arrangement
ROW1
ROW2
ROW3
ROW4
COL1
1
4
7
*/T
COL2
2
5
8
0
COL3
3
6
9
#
* This specification are subject to be changed without notice.
COL4/KT
HD
F
RD/P
2.10.1999
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EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
FUNCTIONAL BLOCK DIAGRAM
SDO
COL1
COL2
COL3
COL4/KT
Keyboard
XMUTE
I/O circuit
XIN
XOUT
Oscillator
interface
HFO HDO
RMUTE
Row/Column
programming counter
Output circuit
(column)
Memory
latch
&
decoder
D/A
converter
DTMF
Timing/Control circuit
~
ROW1
ROW4
Keyboard
Pulse
generator
interface
Input circuit
(Row)
PO
VDD
HFI
HKS
DRING
PIN DESCRIPTIONS
Symbol
ROW1~ROW4
COL1~COL3
COL4/KT
XIN and XOUT
XMUTE
VDD and VSS
HFI
HFO
DTMF
Function
Keyboard scan pins of row group. In idle state (HKS is "High" and HFO is "Low"),
these pins stay ÒHigh impedanceÓ level to prevent power consumption. Otherwise,
these pins switch to ÒHighÓ level for detecting keyboard entry. These pins will output
600 Hz signal while keyboard is scanning.
Keyboard scan pins of column group. In idle state, these pins stay "High impedance"
level. Otherwise these pins switch to ÒLowÓ level for detecting keyboard entry. These
pins will output 600 Hz signal while keyboard is scanning.
The fourth column group pin of the keyboard that also provides the keytone output
. Normally, this pin stays "Low" level for detecting keyboard entry. After a valid
keyboard entry, this pin will output keying confirmation tone that is 600 Hz signal and
30 ms duration. To prevent signal interference, while DTMF issue, it will disable key
tone output except function key.
Oscillator input and output pins. A 3.579545 MHz crystal or ceramic resonator must
be crossed connection to XIN and XOUT pins which generate system clock.
Input/Output structure pin. The output is a open drain structure. Input is schmitt trigger
structure. This pin will be input pin during ON-HOOK status for illegal parallel phone
detect input pin and will be output pin in OFF-HOOK condition for control speech
network.
Positive and negative power supply input pins. Recommended operating voltage from
2.0Vdc to 5.5Vdc.
Handfree inputs pin which accepts falling edge signal to turn "on" or turn "off"
handfree function. This pin is hysteresis input structure and built-in pull up resistor
(typically 200 Kohms).
Handfree outputs pin that is designed to control telephone line for on-hook dialing or
control speakerphone circuit for handfree conversation. When handfree function is
executed, this pin will switch to"High". Otherwise, this pin stays "Low" level.
The DTMF (Dual Tone Multi-Frequency) and music signals output pin. Normally,
this pin stays "Low" level. In Tone dialing mode, this pin will output DTMF signal
that is corresponding to keyboard 0 .. 9, * and # keys.
* This specification are subject to be changed without notice.
2.10.1999
3
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
Symbol
HKS
PO
HDO
SDO
DRING
RMUTE
Function
Control signal inputs pin that is corresponding hook switch status. When handset was
left from cradle, this pin must be connected to "Low" level to operate all functions.
Otherwise, this pin must be connected to "High" level to disable all function and
prevent power consumption.
Pulse signal outputs pin that is NMOS open-drain output structure. Normally, this pin
stays "High impedance" level. In Pulse dialing mode and keypad was entry. This pin
will output pulse trains signal that is corresponding to keyboard 0 .. 9 keys.
Hold function output that is CMOS structure.Normally, this pin stays "Low" level.
When Hold function is executing, this pin will output "High" level. This pin is
designed to drive LED or peripheral circuit to indicate line is at Hold status.
SDO function output that is NMOS open-drain structure. When there is a valid entry
on keyboard, this pin will output a serial data. This serial data is designed to drive LCD
driver to display dialing number on LCD screen or drive voice synthesizer to announce
dialing number to speaker.
The ring signal detect input pin.
While the Tel-ring is incoming, this pin must be connected to "Low" with delay to
indicate the ringing . Otherwise, this pin must be connected to "High" level .
Ring mute output pin that is NMOS open-drain structure. The RMUTE pin is
designed to control microphone of handset to prevent the illegal dialing from pocket
dialer. If the DRING pin is at "High" level , then Off-Hook or turn on Handfree , this
pin will output "Low" level. In other words, the DRING pin is used to check the phone
that receives an incoming call (DRING =Low input) or make an outgoing call
(DRING= High input) . If the phone user make an outgoing call ,then RMUTE pin
activated to prevent the illegal dialing from pocket dialer in the particular application.
The RMUTE can be restored to "High" level when the first key entry is not the
optioned lock-number .
* This specification are subject to be changed without notice.
2.10.1999
4
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
FUNCTION DESCRIPTIONS
Dialing signal selection
The EM91450 series incorporated a special keyboard scanning function that is connecting a resistor (typically
is 560 Kohms) on keyboard scan pin to select many telephone specifications. The specifications are described
as following :
a. Mode
ROW1
Mode
R-Vdd
20 PPS
NR
Tone
R-Vss
10 PPS
c. Flash time
ROW3
ROW4
NR
NR
NR
R-Vss
R-Vss
NR
R-Vss
R-Vss
b. M/B ratio
ROW2
MBR (%)
NR
40:60
R-Vss
33:66
Tf (ms)
600
100
80
300
e. Lock number
COL2
COL3
NR
NR
NR
R-Vss
R-Vss
NR
R-Vss
R-Vss
Lock number
none
0
9
0,9
d. Lock control method
COL1
Control method
R-Vdd
key lock
NR
none lock
R-Vss
password lock
Normal dialing
Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory
automatically. Operating procedure described as follow :
• To select Pulse or Tone mode.
• Off-hook or turn on HF function.
• Keying d1, d2, .. , dn. The "d" expressed digital keypad that included 1~9, *, 0, #, P, and P→T keys. The "n"
expressed unlimited.
• The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.
LNB redial memory
Storing:
In normal dialing mode, every digital key was entry which number will be stored in LNB memory
automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled.
Otherwise, these numbers stored in LNB memory can be redial output.
* This specification are subject to be changed without notice.
2.10.1999
5
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
Redialing:
After normal dialing, directly keying F key (or On-Off hook once) and keying RD key on keyboard. The
numbers that are stored into LNB memory will be dialed output.
Pause (P) key operation
The Pause (P) key is designed to support pause operation in dialing duration. "P" key can be stored in memory
and it will occupy one digital position.
• To select Pulse or Tone mode.
• Off-hook (or turn on HF function), push (d1, d2, .. , dn, RD/P, k1, k2, .. , kn.) These numbers will be dialed
out as following sequence:
d1, d2, .. , dn, Tp, k1, k2, .. , kn.
Pulse to Tone (*/T) key operation
The Pulse to Tone (*/T) key is designed to support toll dialing (long distance call) or PABX system operation.
The "*/T" key can be stored in memory and it will occupy one digital position.
• To select Pulse mode.
• Off-hook (or turn on HF function), push d1, d2, .. , dn, */T, k1, k2, .. , kn. These numbers will be dialed out
as following sequence:
d1, d2, .. , dn, Tpt, k1, k2, .. , kn.
(pulse mode)
(tone mode)
Flash (F) key operation
The Flash (F) key is designed to break telephone line temporarily. After F key is depressed, this dialer will send
a flash signal to break line 600 ms, 300 ms, 100 ms or 80 ms as ROW3 and ROW4 selection.
Handfree (HF) function
The handfree function is designed to support on-hook dialing and loudspeaker application which can be turn "on"
or "off" with falling edge signal from HFI pin. During handfree function is executed, the HFO pin is switched
to "high". Otherwise the HFO pin stays "low" level. One of the following operations can turn off Handfree
function (HFO pin return to "Low").
• On-off hook once.
• Trigger HFI pin with falling edge signal.
• Turn on Hold (HD) function. (HDO pin switched to "High")
Hold (HD) function
The Hold function is designed to stop conversation temporarily. In off-hook state (or HF function is turned on),
to press HD key on the keyboard, the Hold function can be turned "on" (HDO pin switched to "High"). One of
the following operations can turn off Hold function (HDO pin switched to "Low").
• On-off hook once.
• To press HD key over 93 ms.
* This specification are subject to be changed without notice.
2.10.1999
6
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
• Turn on Handfree (HF) function. (HFO pin switched to "High")
Special Note:
A 300 ms delay time (Tdly) at the first Off-Hook or turn on Handfree that is a special designed to avoid a rapid
key entry (dummy number ) in this time duration ,and a long distance call number follows. For example,
Off-Hook , "3" ,............ , "0" ,1,2,3......
Dummy key Lock number key
The dummy number "3" is not detected by the centered office or PABX ,but the following numbers "0" ,1,2,3...
long distance call can be dialed out normally since the leading number "3" is not the Lock-number defined in
EM91450 series. To prevent the unavoidable long distance call, then EM91450 inhibits the key entry during
Tdly.
Operating flow chart
HF
XMUTE =Hi
XMUTE=Lo
(7)
IPP State
HKS=Lo
(1)
On-hook State
HF
HKS=Lo
HKS=Hi
HF
(4)
On-hook
Hand-free State
Off-hook State
HKS=Hi
HD
(2)
HKS=Lo
HF
HF
HF
(3)
Off-hook
Hand-free State
HD
HD
HF
HD
(6)
On-hook
Hold-line State
HD
HKS=Hi
(5)
Off-hook
Hold-line State
HKS=Lo
<Note> : HF = Handfree
HD = Hold
Truth table
Pin level
Operating state
(1) On-hook, idle state
(2) Off-hook line
(3) Off-hook, HF line
(4) On-hook, HF line
(5) Off-hook, HD line
(6) On-hook, HD line
(7) IPP state
Input
HKS
H
L
L
H
L
H
H
I/O
XMUTE
H/F
H/F
H/F
H/F
L/L
L/L
L/L
PO
F
F
F
F
F
F
F
Output
HFO
L
L
H
H
L
L
H
HDO
L
L
L
L
H
H
H
DTMF
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.
* This specification are subject to be changed without notice.
2.10.1999
7
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.
ready
0
start bits
1
bit 0
bit1
bit2
bit3
data bits
bit4
bit5
1
0
stop bits
∗ Keypad,SDO format and LCD display reference table:
Keypad
1
2
3
4
5
6
7
8
9
0
"*"/T
#
P
*/"T"
HOLD
HF
F
(Lock state)
RD
bit5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
bit4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
bit3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
1
bit2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
0
0
1
0
1
bit1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
1
0
0
bit0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
1
1
1
Display
1
2
3
4
5
6
7
8
9
0
P
HOLD
Speaker
clear all display
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
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EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
Normal dialing :
Set lock function to none lock mode (without resistor connected to COL1 pin) or set password equal to 000.
In this case, the dialer is operated in normal mode and all functions work at unlimitation.
Dialing via LOCK function
Conventional key lock mode. (Connects a resistor on COL1 pin to VDD)
• Off hook (or turn on HF function)
• Keying : d1 , d2 , .. , dn . If the first number (d1) is the same with the lock number that optioned in table,
then all entry numbers can not be dialed out and keyboard will be inhibited until on to off hook once again
or flash. If the first number is not equal to lock number, all the entry numbers will be dialed out.
Password control mode. (Connects a resistor on COL1 pin to VSS)
• Off hook (or turn on HF function)
• Keying : ([ # , ps1 , ps2 , ps3 ] + telephone number.) The numbers in the [ ] symbol could be omitted. The
number "#" will be inhibited when the current password is not equal to 000,and ps1 , ps2 , ps3 work at
the checking state, not to be dialed out. Other descriptions are as on following :
◊ Incorrect password entry. The telephone numbers can not be dialed out.
◊ Password is omitted . If the first digit of telephone numbers is the same with the lock number, all of the
telephone numbers can not be dialed out and keyboard will be inhibited until On to Off hook once again
or flash. If the first digit is not equal to the lock number then the telephone numbers will be dialed out
entirely.
◊ Correct password entry. The telephone numbers can be dial out no matter what lock number is. If the first
digit is not equal to the lock number then the telephone numbers will be dialed out entirely and use the Flash
key to redial any other number will not check the pass word again.
Ring detector
The Ring detector is designed to prevent illegal dialing from pocket dialer. Following the procedures ( i,ii,iii ),
this dialer will detect DRING pin to control RMUTE output level. If DRING is detected a "Low" level, the
RMUTE stays "High impedance". If DRING is detected a "High" level, the RMUTE will output "Low" until
keyboard entry. In actual application of the RMUTE pin is recommended connection to microphone of the
phone handset to prevent that the dialing signal (DTMF) is coupling by the Microphone of the phone handset.
(such as pocket dialer)
i. In idle state, HKS is from "High" to "Low" (pick up handset action).
ii. In idle state, turn on handfree function.
iii. The flash operation ( F key ).
* This specification are subject to be changed without notice.
2.10.1999
9
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
I.P.P. DETECT function
The EM91450 series provide the I.P.P. function to pretect illegal connect. I.P.P means Illegal Parallel Phone
Detect. I.P.P. function depend on XMUTE pin and HKS, HF status. When in the ON-HOOK condition and HF
turn off, the XMUTE pin will be a Input pin to detect the voltage lever, otherwises, the XMUTE pin will be a
normally output pin use for control speech network. When I.P.P. function detect. XMUTE pin at "low" status (In
On-Hook and HF turn OFF state), EM91450 will turn on HF and send alarm signal to telephone line. In alarm
duration DTMF pin will continue sending "#","8" "8" signal. The DTMF signal will interfere the illegal user until
the illegal user hang up the phone and the XMUTE pin detect "high" again. The telephone circuit design can allow
the legal internal connect user. (see I.P.P Application CIRCUIT).
* This specification are subject to be changed without notice.
2.10.1999
10
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25 oC, all voltages referenced to VSS)
Items
Sym.
Power supply voltage
Input voltage range
Operating temperature
Storage temperature
Power consumption
Rating
VDD
VIN
TOPR
TSTO
PD
Unit
6.0 Vdc
VSS-0.3V ~ VDD+0.3V
0 ~ 50
-55 ~ 125
500
V
V
o
C
o
C
mW
DC ELECTRICAL CHARACTERISTICS
(Ambient temperature is 25 oC, VDD=2.5V unless otherwise noted, all voltages referenced to VSS, Fosc=3.579545 MHz)
Parameter
Sym.
Operating voltage
Pulse
Tone
Pulse
Tone
Operating current(HKS=0)
Memory retention current
Standby current
○
○
○
HKS=1
HKS=0
HKS=1
HKS=0
HKS, HFI & DRING
pins: input voltage
Xmute pin : Schmitt triggers
(input pin)
HFO & HDO pins source current
PO, HFO, XMUTE, RMUTE
& SDO pins: sink current
PO, XMUTE, RMUTE and SDO
pins: leakage current
HFI pin input resistance
Keyboard scanning pins
output current (except COL4/KT)
COL4/KT source current
sink current
DTMF pin: sink current
DTMF signal DC level
DTMF signal: ac level
pre-emphase
distortion
load resistance
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Min.
Max. Unit
Condition
unload
mA
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
ViH
ViL
VH-L
VL-H
IoH
IoL
5.5
5.5
0.3
0.5
0.1
0.1
10
0.1
30
VDD
0.2VDD
0.1VDD
VDD
-
V
0.8VDD
VSS
VSS
0.9VDD
0.2
-0.2
0.15
0.3
1
10
-
V
V
mA
mA
at idle state
IoH
-
-
0.01
uA
Vo = Vdd
2
200
0.2
0.2
-0.2
0.5
142
1
5
200
10
400
160
2
-30
-
50
800
0.75
180
3
-23
-
KΩ
uA
µA
mA
Vhfi = Vss
Vksn=Vss
ksn=Vdd
Vo=2.0V
Vo=0.5V
Vdtmf = 0.5 V
Vdd = 2.0V ~ 5.5V
Row group
Column - Row
ZL = 5 KΩ
THD < − 23dB
Idd
Imrt
Istby
Rhfi
IoH
IoL
IoH
IoL
IoL
Vdc
Vdtmf
Twist
THD
ZL
2.0
2.0
-
Typ.
uA
uA
with pull up/down
resistor * 8
V
mA
Vdd
mVrms
dB
dB
KΩ
Vo = 2.0 V
Vo = 0.5 V
Distortion(dB)=20 log
{[V12+V22+V32 ..... +Vn2)1/2]/[(VL2+VH2)1/2]}
VL, VH =ROW group and column group signal.
V1, V2, V3 .... Vn = Harmonic signal (BW=300Hz~3500Hz)
* This specification are subject to be changed without notice.
2.10.1999 11
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
AC ELECTRICAL CHARACTERISTIC
(Ambient temperature is 25oC, VDD=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz)
Parameter
Keyboard debounce time
Key tone signal: frequency
duration
Pause time
Pulse to Tone waiting time
Flash time
Sym.
Min.
Typ.
Max. Unit
Tdb
Fkt
Tkt
Tp
Tpt
Tf
20
600
30
3.6
3.6
600
100
80
300
20
10
40:60
33:66
800
500
98
98
93
100
100
-
3.9
300
4.1
-
Pulse rate
PSR
Make/Break ratio
MBR
Inter-digit pause time
Tidp
Minimum tone duration
Minimum inter-tone pause
HD key release hold function
debounce time
SDO bit time
Off-Hook delay time
Tp
Titp
Thdrdb
96
96
-
Tbit
Tdly
3.8
-
Condition
ms
Hz
ms
sec.
sec.
ms
pps
%
ms
ms
ms
Row3B, Row4B=NR, NR
Row3B, Row4B=NR, R-Vss
Row3B,Row4B=R-Vss, NR
Row3B,Row4B=R-Vss,R-Vss
Row1 = R-Vdd
Row1 = R-Vss
Row2 = NR
Row2 = R-Vss
PSR = 10 pps
PSR = 20 pps
Memory dialing
ms
ms
DTMF output frequency (fosc = 3.579545 MHz)
Keyboard scan pin
ROW1 (f1)
ROW2 (f2)
ROW3 (f3)
ROW4 (f4)
COL1 (f5)
COL2 (f6)
COL3 (f7)
CCITT standard (Hz)
697
770
852
941
1209
1336
1477
Actual output (Hz)
699.1
766.2
847.4
947.9
1215.8
1331.6
1471.8
* This specification are subject to be changed without notice.
Deviation (%)
0.30
0.49
-0.53
0.73
0.56
-0.32
-0.35
2.10.1999
12
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
TIMING DIAGRAM
HKS
2
KEY IN
3
Tdb
KT
Tkt
XMUTE
SDO
Tm
PO
Tidp
DTMF
T T T T
b m b m
Tidp
OSC.
Tdly
Hi-impedance
Figure 1. Pulse mode operating timing
HKS
KEY IN
KT
2
3
Tdb
XMUTE
SDO
PO
Td
Titp
Titp
DTMF
OSC.
Hi-impedance
Figure 2. DTMF mode operating timing
* This specification are subject to be changed without notice.
2.10.1999 13
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
LNB=2,3
HKS
KEY IN
RD/P
Tdb
KT
Tkt
XMUTE
SDO
Tm
PO
Tidp
DTMF
Tidp
T T T T
b m b m
OSC.
Tdly
Hi-impedance
Figure 3. Pulse mode LNB redial timing
LNB=2,3
HKS
RD/P
KEY IN
Tdb
KT
Tkt
XMUTE
SDO
PO
Td
Titp
Td
Titp
DTMF
OSC.
Tdly
Hi-impedance
Figure 4. DTMF mode LNB redial timing
* This specification are subject to be changed without notice.
2.10.1999
14
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
HKS
2
KEY IN
RD/P
3
KT
XMUTE
Tp
SDO
PO
Tidp
Tidp
DTMF
OSC.
Hi-impedance
Figure 5. Pause key operating timing
HKS
2
KEY IN
*/T
3
4
KT
XMUTE
Tpt
SDO
PO
DTMF
OSC.
Figure 6. Pulse to Tone (P→T) operating timing
Hi-impedance
HKS
KEY IN
F
Tdb
KT
XMUTE
SDO
PO
Tf
Tfp=300ms
DTMF
OSC.
Figure 7. Flash key operating timing
* This specification are subject to be changed without notice.
Hi-impedance
2.10.1999 15
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
HKS
2
KEY IN
Tdb
KT
SDO
SB 0 b0
SB
0
1
0
L
b1 b2 b3 b4 b5 SPB SPB
1
Tbit
0 0
0 0
0
1
M
Hi-impedance
<Note>L=Least significant bit,M=Most significant bit, SB=START bit , SPT=STOP bit
Figure 8. SDO operating timing
HKS
KEY IN
HF
HD
HF
HD
HD
HD
HF
HD
HD @
93
ms
HFO
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
HKS
HF
5
KEY
0
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
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
Toff
RING
Ton
DRING
HKS
RMUTE
Figure 11. Timing of receiving an incoming call
* The external ring detection circuit must send a low signal at the total ring cycle (Ton and Toff)
RING
DRING
HKS
RMUTE
Figure 12. Timing of making an outgoing call
* This specification are subject to be changed without notice.
2.10.1999 17
* This specification are subject to be changed without notice.
PO
22
HDO
BUZZER
21
XMUTE
8
XOUT
7
XIN
6
COL1
5
COL2
4
COL3
3
KT/COL4
SDO
RMUTE
HF
DRING
0.1u 0.1u
VSS
3.58M
HFI
10
SW2: ON : Enable IPP detect
OFF : Disable
ROW4
EM91450DK
ROW3
20
PC817
100K
VDD
0.01u
1K5
ROW2
19
11
SW2
50
1815
ROW1
18
ON
SDO
LCD
DRIVER
HK
HKS
17
4.7M
OFF
1N4148
LINE
HDO
100K
47K
XMUTE
16
1N4148
VDD
0.1u
SCAN
C945
470K
1815
VDD
1M
HDO
KEYBORAD
AND
HOLD
1N4148
HFO
PO
4V7
0.001u
15
DRING
BRIDGE
+
16V
0.1u
1N4148
+
VDD
NETWORK
DTMF
22M
VDD
1u
DRING
47K
470u
1N4148
3K3
1N4148
SPEECH
HFO
14
-
PC817
4K7
47K
1N4148
LINE
RMUTE
ILLEGAL CONNECT EXTERNAL PHONE DETECT CIRCUIT
100
27V
100K
1.2M
VDD
A42
2K2
220K
A92
HOOK-SW
LINE
PO
0.22u/50V
+
BRIDGE
+
100K
HFO
13
Tip'
-
BRIDGE
0.1u
470
-
ON-HOOK
10M
12
Ring'
Tip
Ring
OFF-HOOK
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
EM91450 SERIES
APPLICATION CIRCUIT : CONTROL AND IPP DETECT
9
2
1
2.10.1999
18
* This specification are subject to be changed without notice.
SCAN
LINE
HDO
47u
220K
1u
C945
0.1u
ROW4
ROW3
ROW2
ROW1
COL1
COL2
COL3
COL4
COL4/KT
C945
ROW1
0
*/T
#
9
6
3
RD/P
F
HD
MODE
VDD
MBR
Typical Resistor value are 560K
LOCK NUMBER
8
7
LOCK
VDD
5
2
4
1
For more detail please reference R-option section
R-option
AUTOMATICALLY HOLD
RELEASE CIRCUIT
22K
47K
47K
FLASH TIME
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
EM91450 SERIES
APPLICATION CIRCUIT : KEY BOARD AND HOLD
2.10.1999 19
* This specification are subject to be changed without notice.
SDO
NOTED :
VDD
V2
VC1
V3
SEG22
VC2
SEG23
VSS
SEG24
SEG25
XOUT
XIN
32
31
34
33
38
37
40
MS1
30
36
JUMP : Real Time Clock ON/OFF
JUMP : 24/12 format select
HKS
0.1u
SEG16
SDI
0.1u
SEG15
SPARE2
32768
SEG14
SPARE1
SDI
MS2
HKS
MS1
VDD
SEG12
0.1u
SEG13
24/12
ENRTC
TEST
FG
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
MS2
SEG10
RTC
HOUR
46
SEG11
GF
JUMP : General Flag icon for LOGO ON/OFF
CALENDAR JUMP : CALENDAR ON/OFF
MS1 ,MS2 adjust Time
SDI
ENCLND
COM3
COM2
SEG26
47
48
49
50
EM32117
SEG21
HOUR
VDD
58
SEG20
COM1
65
SEG19
51
66
SEG18
COM0
67
SEG17
52
68
SEG31
69
53
70
470K
71
SEG30
72
54
73
RTC
74
SEG29
75
SEG28
76
55
SEG27
77
56
57
78
VDD
79
1N4148
HKS
VDD
CALENDAR
EXTRA
1.5V BATTERY
80
C945
C945
C945
C945
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
HK
EM32117 can used this cricuit replace
extra battery .
( But if LCD PANEL's power consumption
are too large , the extra battery still be
needed. )
1M
LCD PANEL
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
COM0
COM1
COM2
COM3
RECOMMAND CRICUIT :
DIALER
PART VDD
19
18
17
16
15
14
13
12
11
10
9
8
TEST
GF
VDD
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
EM91450 SERIES
APPLICATION CIRCUIT : LCD DRIVER USE EM32117
27
28
29
35
39
2.10.1999
20
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
MS2
48
NC
XOUT
NC
MS1
9
10
11
12
JUMP : Real Time Clock ON/OFF
JUMP : 24/12 format select
NOTED :
RTC
MS1 ,MS2 adjust Time
HOUR
VDD
HOUR
RTC
SDO
HFO
* This specification are subject to be changed without notice.
** EM32100 need HDO and HFO **
1N4148
1N4148
HDO
HK
330K
1N4148
EXTRA
1.5V BATTERY
47K
VDD
C945
220K
SDI
HKS
VDD
20p 20p
7
8
13
14
15
6
0.1u
0.1u
16
23
5
NC
SEG16
VP
ENRTC
VN
SEG15
VEE
24/12
SEG24
VSS
SEG14
SEG23
SEG13
3
4
32768
NC
2
SDI
VDD
HKS
EM32100
XIN
1
VDD
46
47
F32H
TEST1
44
43
45
TEST2
COM3
COM2
41
40
39
38
42
COM1
SEG1
SEG2
SEG3
SEG4
SEG12
SEG17
25
SEG11
VDD
17
26
SEG10
18
27
NC
SEG22
28
HKS
19
29
SEG9
SEG21
30
SDI
20
31
SEG8
SEG20
32
MS2
21
33
MS1
SEG7
SEG19
34
SEG6
22
35
SEG5
36
SEG18
COM3
COM2
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
24
LCD PANEL
37
TEST AND F32H
APPLICATION CIRCUIT : LCD DRIVER USE EM32100
2.10.1999 21
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
PACKAGE INFORMATION
Example :
EM
(1)
91450 P
(2) (3)
(1) ELAN MICRO. pefix
(2) Type number
(3) Package code:
P→PDIP
K→Skinny
R→SDIP
18/20/28 Lead Plastic Package
E1
1
D
E
A
A1
L
C
B
e
B1
eB
18 PDIP
DIM
A
A1
B
B1
C
D
E
E1
e
eB
L
MILIMETERS
MIN. MAX.
5.334
0.381
0.356 0.558
1.150 1.778
0.204 0.381
22.35 23.37
7.620 8.255
6.096 7.112
2.286 2.794
10.92
2.921 4.064
20 PDIP
INCHES
MILIMETERS
INCHES
MIN. MAX. DIM MIN. MAX. MIN. MAX.
.210
A
5.334
.210
.015
A1 0.381
.015
.014 .022
B
0.356 0.558 .014
.022
.045 .070
B1 1.150 1.778 .045
.070
.008 .015
C
0.204 0.381 .008
.015
.880 .920
D
25.40 26.67 1.000 1.050
.300 .325
E
7.620 8.255 .300
.325
.240 .280
E1 6.096 7.112 .240
.280
.090 .110
e
2.286 2.794 .090
.110
.430
eB
10.92
.430
.115 .160
L
2.921 4.064 .115
.160
* This specification are subject to be changed without notice.
28 PDIP
DIM
A
A1
B
B1
C
D
E
E1
e
eB
L
MILIMETERS
MIN. MAX.
6.350
0.381
0.356 0.558
1.016 1.778
0.204 0.381
35.56 37.85
15.24 15.88
13.21 14.73
2.286 2.794
17.78
2.921 5.080
INCHES
MIN. MAX.
.250
.015
.014
.022
.040
.070
.008
.015
1.400 1.490
.600
.625
.520
.580
.090
.110
.700
.115
.200
2.10.1999
22
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
22/24 Lead Plastic Package-Skinny
E1
1
D
E
A
A1
L
C
B
e
B1
eB
22 PDIP (skinny)
DIM
A
A1
B
B1
C
D
E
E1
e
eB
L
MILIMETERS
MIN.
MAX.
4.752
0.381
0.356
0.558
1.27
1.778
0.204
3.556
25.90
26.67
7.620
8.255
6.223
6.604
2.286
2.794
8.382
10.16
2.921
4.064
24 PDIP (skinny)
INCHES
MIN.
MAX.
.180
.015
.014
.022
.050
.070
.008
.014
1.02
1.05
.300
.325
.245
.260
.090
.110
.330
.400
.115
.160
DIM
A
A1
B
B1
C
D
E
E1
e
eB
L
* This specification are subject to be changed without notice.
MILIMETERS
MIN.
MAX.
4.572
0.381
0.356
0.558
1.27
1.778
0.204
0.381
31.24
32.26
7.620
8.255
6.223
6.731
2.286
2.794
8.636
9.652
2.921
4.064
INCHES
MIN.
MAX.
.180
.015
.014
.022
.050
.070
.008
.015
1.23
1.270
.300
.325
.245
.265
.090
.110
.340
.380
.115
.160
2.10.1999 23
EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
42 SDIP Package
E1
D
E
A A2
C
A1
L
D1
B
e
B1
eB
42 SDIP
DIM
A
A1
A2
B
B1
C
D
E1
e
eB
D1
L
MILIMETERS
MIN.
MAX.
5.08
0.381
3.937
4.191
0.356
0.559
0.914
1.116
0.204
0.304
36.70
37.34
13.84
14.10
1.727
1.829
15.24
17.78
0
0.127
2.921
3.429
* This specification are subject to be changed without notice.
INCHES
MIN.
MAX.
0.200
0.015
0.155
0.165
0.014
0.022
0.036
0.044
0.008
0.012
1.445
1.470
0.545
0.555
0.068
0.072
0.600
0.70
0
0.005
0.115
0.135
2.10.1999
24