EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

GENERAL DESCRIPTION

The EM91210 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with
10 set memories. The EM91210 series provides necessary functions of telephone set for application in any
environment, such as Pulse dialing, Tone (DTMF) dialing, Handfree dialing, keying tone , mute and pulse mute
functions. Beside this, SDO (Serial Data Output) functions is provided in advance version that is designed to
drive LCD driver and voice synthesizer. In this application, the dialing numbers can be displayed on LCD screen
with EM32100 ( or EM32116 ).

FEATURES

· 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, Pause time, P-T wait time and keyboard type.

· SDO function supports LCD driver and voice synthesizer to indicate dialing numbers.
· Handfree function provides on-hook dialing and speakerphone application.
· 10-set two touch repertory memory, each one can store data up to 16 digits.
· A 32-digit LNB (last number) redial memory.
· A 32-digit SAVE redial memory.
· Keytone function provides rapidly keying recognition.
· Pulse mute function supports pulse dialing application.
· Using 3.579545 MHz crystal or ceramic resonator.
· Package forms: PDIP, skinny.

ORDERING INFORMATION

Versions list

VERSION LNB KT SAVE HF SDO(LCD) PMUTE

EM91210A

EM91210B

EM91210C

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

FUNCTIONAL BLOCK DIAGRAM

Keyboard Arrangement

Type A

Type B

EM91210

Pin Assignment

COL5

COL4/KT

COL3

COL2

COL1

XIN

XOUT

XMUTE

VSS

ROW4

ROW3

ROW2

ROW1

HKS

VDD

DTMF

EM91210AP

COL5

COL4/KT

COL3

COL2

COL1

XIN

XOUT

XMUTE

VSS

HFI

ROW4

ROW3

ROW2

ROW1

HKS

VDD

DTMF

HFO

EM91210BP

COL5

COL4/KT

COL3

COL2

COL1

XIN

XOUT

XMUTE

VSS

HFI

SDO

ROW4

ROW3

ROW2

ROW1

HKS

VDD

DTMF

HFO

EM91210CK

ROW1

ROW2

ROW3

ROW4

COL1

*/T

COL2

COL3

COL4/KT

SAVE

RD/P

COL5

ROW1

ROW2

ROW3

ROW4

COL1

COL2

COL3

COL4/KT

SAVE

RD/P

COL5

COL1

COL2

COL3

COL4/KT

COL5

XIN

XOUT

ROW1

ROW4

HFO PM

XMUTE

Keyboard

interface

(column)

Oscillator

Keyboard

interface

(Row)

Output circuit

Memory

(Melody)

Timing/Control circuit

Input circuit

Pulse

generator

latch

decoder

D/A

converter

Row/Column

programming counter

DTMF

HKS

HFI

VDD

SDO

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

PIN DESCRIPTIONS

Symbol

Function

ROW1~ROW4

Keyboard scan pins of row group. In idle state (HKS is "High" and HFO is "Low"),
these pins stay "High impedance" level to prevent power consumption. Otherwise,
these pins switch to "High" level for detecting keyboard entry. These pins will output
600 Hz signal while keyboard is scanning.

COL1~COL3 and COL5

Keyboard scan pins of column group. In idle state, these pins stay "High impedance"

level. Otherwise these pins switch to "Low" level for detecting keyboard entry. These
pins will output 600 Hz signal while keyboard is scanning.

COL4/KT

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. While DTMF output, the key tone will be disabled.

XIN and XOUT

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.

XMUTE

The Tone/Pulse MUTE signal output pin that is NMOS open-drain output structure.
This pin will switch to "Low" level during Tone/Pulse dialing.
Otherwise, this pin stays "High impedance" level.

and V

Positive and negative power supply input pins. Recommended operating voltage from
2.0Vdc to 5.5Vdc.

HFI

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).

HFO

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.

DTMF

The DTMF (Dual Tone Multi-Frequency) 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.

HKS

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.

Pulse signal outputs pin that is CMOS inverter output structure. Normally, this pin
stays "Low" level. During pulse signal dialing or flash function executing, this pin will
switch to "High" level to control the external circuit.

SDO

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.

No connection.

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

FUNCTION DESCRIPTIONS

Dialing signal selection

The EM91210 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

b. M/B ratio

ROW1

Mode

ROW2

MBR (%)

R-Vdd

20 PPS

40:60

Tone

R-Vss

33:66

R-Vss

10 PPS

c. Flash time

d. DTMF signal

ROW3

ROW4

Tf (ms)

COL1

Td (ms)

Titp (ms)

600

R-Vdd

R-Vss

100

R-Vss

300

e. Pause time and P-T wait time

f. Keyboard operate type

COL2

Tp (sec)

Tpt (ms)

COL3

Type

3.6

R-Vss

2.0

R-Vss

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.

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.

SAVE redial memory

The SAVE meomry is designed in EM91210 series to support 32 digits capacity buffer for second redial,
pager, Memory and other system applications.

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

Storing : EM91210 series support two operating methods to store numbers into SAVE redial memory.

Method 1
· To select Pulse or Tone mode.
· Off-hook (or turn on HF function), push d1, d2, .. , dn. The numbers d1, d2, .. , dn will be dialed out in Pulse

or Tone mode as selection.

· After dn had been dialed out and push [ST], Save key. If the keying numbers are more than 32 digits that

content of SAVE memory can not be updated. Otherwise, these numbers will be stored into SAVE memory.
In the [] key allows to be omitted.

Method 2

Off-hook (or turn on HF function), push ST, d1, d2, .. , dn, [ST], Save. If the keying numbers are not over 32
digits, the numbers d1, d2, .. , dn will be stored in SAVE redial memory automatically.

Dialing :
· To select Pulse or Tone mode.
· Off-hook (or turn on HF function), push Save key. The numbers stored in SAVE memory will be dialed out

in Pulse or Tone mode as selection.

Repertory memory

The EM91210 series incorporated several sets repertory memory and each one can store number up to 16 digits.
In memory storing, if stored numbers are more than 16 digits that only the previous 16 digits can be stored into
specific memory. Otherwise, these numbers can be stored entirely. After memory dialed out, the content of
LNB is keeping to current data.

Storing of 10 sets memory types

Indirect (two-touch) operation
Off-hook (or turn on HF function), push ST, d1, d2, .. , dn, ST, n. The numbers d1, d2, .. , dn will be stored
into memory location "n". The "n" expressed digital key from 0 to 9.

Dialing (after memory dialed out, the content of LNB is keeping to current data)

Indirect (two-touch) of 10 sets memory

· To select Pulse or Tone mode.
· Off-hook (or Turn on HF function), push A, n key. The numbers that are stored in indirect memory location

"n" will be dialed out in Pulse or Tone mode as selection. The "n" expressed digital key from 0 to 9.

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.

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

· 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 or P-T) key operation

The Pulse to Tone (*/T or P-T) key is designed to support toll dialing (long distance call) or PABX system
operation. The "*/T (or P-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, (or P-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.

Truth table

Operating state

Input/Output pin level

HKS

XMUTE

HFO

(0) On-hook, idle state

(1) Off-hook line

(2) Off-hook, HF line

(3) On-hook, HF line

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

bit 0

bit1

bit2

bit3

bit4

bit5

ready

start bits

data bits

stop bits

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

SDO Keypad Encoded table:

Digital key (b5,b4=0,0)

keypad

"*"/T

*/"T" or P-T

output
b3,b2,b1,b0 0001 0010 0011 0100 0101 0110 0111 1000 1001

1010 1011

1100 1101

1110

Display

Function key (b5,b4=1,0)

keypad

output
b3,b2,b1,b0

1111

Display

clear all display

Keypad,SDO format and LCD display reference table:

Keypad

bit5

bit4

bit3

bit2

bit1

bit0

Display

"*"/T

*/"T" or P-T

clear all display

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

ELECTRICAL CHARACTERISTICS

(Ambient temperature is 25

C, V

=2.5V unless otherwise noted, all voltages referenced to V

, Fosc=3.579545 MHz)

Parameter

Sym.

Min.

Typ.

Max. Unit

Condition

Operating voltage

Pulse

2.0

5.5

unload

Tone

2.0

5.5

Operating current(HKS=0)

Pulse

Idd

0.15

0.3

unload

Tone

0.3

0.5

Pulse

0.15

0.3

with pull up/down

Tone

0.3

0.5

resistor * 8

Memory retention current

Imrt

0.001

0.1

HKS=1,Vdd=1V

Standby current

HKS=1

Istby

0.001

0.1

unload

HKS=0

HKS=1

-0.001

0.1

with pull up/down

HKS=0

resistor * 8

HKS, HFI

ViH

0.8Vdd

Vdd

pins: input voltage

ViL

Vss

0.2Vdd

HFO & PM pins source current

IoH

0.2

Vo = 2.0 V

PO, HFO, XMUTE,

IoL

-0.2

Vo = 0.5 V

& PM, SDO pins: sink current

PO, XMUTE and SDO

IoH

0.001 uA

Vo = Vdd

pins: leakage current

HFI pin input resistance

Rhfi

200

Vhfi = Vss

Keyboard scanning pins

IoH

Vksn=Vss

output current (except COL4/KT)

IoL

200

400

800

Vksn=Vdd

COL4/KT source current

IoH

0.2

Vo=2.0V

sink current

IoL

0.2

Vo=0.5V

ABSOLUTE MAXIMUM RATINGS

(Ambient temperature is 25

C, all voltages referenced to V

)

Items

Sym.

Rating

Unit

Power supply voltage

6.0 Vdc

Input voltage range

-0.3V ~ V

+0.3V

Operating temperature

OPR

0 ~ +50

Storage temperature

STO

-55 ~ 125

Power consumption

500

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

Keyboard debounce time

Tdb

Key tone signal:

frequency

Fkt

600

present duration

Tkt

Pause time and pulse to tone

3.6

sec.

COL2=NR

Tpt

sec.

COL2=R-Vss

Flash time

600

Row3, Row4=NR, NR

100

Row3, Row4=NR, R-Vss

Row3, Row4=R-Vss, NR

300

Row3, Row4=R-Vss,R-Vss

Flash pause time

Tfp

300

Pulse rate

PSR

pps

Row1 = R-Vdd

Row1 = R-Vss

Make/Break ratio

MBR

40:60

Row2 = NR

33:66

Row2 = R-Vss

Inter-digit pause time

Tidp

800

PSR = 10 pps

500

PSR = 20 pps

DTMF pin: sink current

IoL

-0.2

Vdtmf = 0.5 V

DTMF signal DC level

Vdc

0.5

0.75

Vdd

Vdd = 2.0V ~ 5.5V

DTMF signal: ac level

Vdtmf

142

160

180 mVrms Row group

pre-emphase

Twist

Column - Row

distortion

THD

-30

-23

RL = 5 K

load resistance

THD

23dB

100

Minimum tone duration

Memory dialing

100

Minimum inter-tone pause

Titp

Memory dialing

SDO every bit time

Tbit

3.8

3.9

4.1

Parameter

Sym.

Min.

Typ.

Max. Unit

Condition

ELECTRICAL CHARACTERISTIC

(Ambient temperature is 25

C, V

=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz)

DTMF output frequency

(fosc = 3.579545 MHz)

Keyboard scan pin

CCITT standard (Hz)

Actual output (Hz)

Deviation (%)

ROW1 (f1)

697

699.1

0.30

ROW2 (f2)

770

766.2

0.49

ROW3 (f3)

852

847.4

-0.53

ROW4 (f4)

941

947.9

0.73

COL1 (f5)

1209

1215.8

0.56

COL2 (f6)

1336

1331.6

-0.32

COL3 (f7)

1477

1471.8

-0.35

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

APPLICATION CIRCUIT

HANDSET

HANDFREE

SW1B

BRIDGE

TIP

ONHOOK

OFFHOOK

SW1A

A92

R47

220K

R54

10M

R48

100K

1N4148

R49

2K7

R52

220K

C16

.001U

R36

470K

R33

1K5

Q18

1815

HOOK

HFO

R55

470K

EM32100

JP9

Q14

C945

D16

1N4148

D17

1N4148

R56

47K

C17

.01U

Q19

1815

R67

C24

.1u

C31

220uF

D13

5V1

C945

R37

100K

C25

.1U

R35

2K2

A42

D14

1N4148

R69

47K

RING

R68

100K

1N4148

R43

47K

AUDIO

POWER

AMPLIFER

JUMPER

560K

*/T

SAVE

RD/P

JUMPER

VDD

560k

JUMPER

VDD

560k

EM91210CK

SDO

LCD DRIVER

VCC

1.5V

2 TO 4 LINE

SPEECH

NETWORK

3.58MHz

560k

BUZZER

10p

SDO

ROW4

ROW3

ROW2

ROW1

HKS

VDD

DTMF

HFO

COL5

COL4/KT

COL3

COL2

COL1

XIN

XOUT

XMUTE

VSS

HFI

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

EM32100 Application Circuit :

Package type : QFP 48 pins or chip form provided

SEG5

SEG4

SEG3

SEG2

SEG1

COM1

COM2

COM3

TEST2

TEST1

F32H

SEG17

SEG18

SEG19

SEG20

SEG21

SEG22

SEG23

SEG24

SEG6

SEG7

SEG8

SEG9

SEG10

SEG11

SEG12

SEG13

SEG14

SEG15

SEG16

MS1

MS2

SD1

HKS

XIN

XOUT

24/12

ENRTC

.1µ

EM32100

8/10 Digits LCD Pannel

1.5V

32768Hz

1µ

100k

200k

100k

20p

C945

220k

47k

DIODE

C945

HKS

HDO

HFO

SDO

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

EM32116 Application Circuit :

Package type : QFP 64 pins or chip form provided

24/12

ENRTC

ENCLND

COM3

COM2

COM1

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

TEST2

BATCKOF

BATLOW

SEG0

SEG1

SEG2

SEG3

SEG4

SEG5

SRG6

SEG7

SEG8

SEG9

COM3

COM2

COM1

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

SEG25

SEG24

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

XOUT

XIN

VSS

VC2

VC1

HKS

SDI

MS2

MS1

F32HZ

TEST1

EM32116

1.5V

OFF

CALENDAR

OFF

RTC

OFF

HOUR

20p

32768Kz

.1µF

SW HOOK

100k

.1µ

C945

470k

LINE

Hook Switch detection circuit

SDI

LCD110

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

Example :

91210 P

(1)

(2)

(3)

(1) ELAN MICRO. pefix
(2) Type number
(3) Package code:

PDIP

Skinny

SDIP

18 PDIP

MILIMETERS

INCHES

DIM

MIN.

MAX. MIN. MAX.

5.334

.210

0.381

.015

0.356

0.558

.014

.022

1.150

1.778

.045

.070

0.204

0.381

.008

.015

22.35

23.37

.880

.920

7.620

8.255

.300

.325

6.096

7.112

.240

.280

2.286

2.794

.090

.110

10.92

.430

2.921

4.064

.115

.160

20 PDIP

MILIMETERS

INCHES

DIM

MIN.

MAX.

MIN.

MAX.

5.334

.210

0.381

.015

0.356

0.558

.014

.022

1.150

1.778

.045

.070

0.204

0.381

.008

.015

25.40

26.67

1.000

1.050

7.620

8.255

.300

.325

6.096

7.112

.240

.280

2.286

2.794

.090

.110

10.92

.430

2.921

4.064

.115

.160

28 PDIP

MILIMETERS

INCHES

DIM

MIN.

MAX. MIN.

MAX.

6.350

.250

0.381

.015

0.356

0.558

.014

.022

1.016

1.778

.040

.070

0.204

0.381

.008

.015

35.56

37.85 1.400

1.490

15.24

15.88

.600

.625

13.21

14.73

.520

.580

2.286

2.794

.090

.110

17.78

.700

2.921

5.080

.115

.200

PACKAGE INFORMATION

18/20/28 Lead Plastic Package

EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

22/24 Lead Plastic Package-Skinny

22 PDIP (skinny)

MILIMETERS

INCHES

DIM

MIN.

MAX.

MIN.

MAX.

4.752

.180

0.381

.015

0.356

0.558

.014

.022

1.27

1.778

.050

.070

0.204

3.556

.008

.014

25.90

26.67

1.02

1.05

7.620

8.255

.300

.325

6.223

6.604

.245

.260

2.286

2.794

.090

.110

8.382

10.16

.330

.400

2.921

4.064

.115

.160

24 PDIP (skinny)

MILIMETERS

INCHES

DIM

MIN.

MAX.

MIN.

MAX.

4.572

.180

0.381

.015

0.356

0.558

.014

.022

1.27

1.778

.050

.070

0.204

0.381

.008

.015

31.24

32.26

1.23

1.270

7.620

8.255

.300

.325

6.223

6.731

.245

.265

2.286

2.794

.090

.110

8.636

9.652

.340

.380

2.921

4.064

.115

.160

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: EM91210B

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: EM91210B