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GENERAL DESCRIPTION
The EM91401 is a series of tone/pulse switchable dialers that is composed of T/P dialer. The EM91401 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, melody generator, ring detector and SDO (Serial Data Output) functions are
provided in advance version. Melody generator will output dual-tone music in line hold duration. 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 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, lock dialing functions.
• SDO function supports LCD driver and voice synthesizer to indicate dialing numbers.
• Line hold function is designed for stopping conversation temporality.
• Melody generator provides music on hold function.
• Lock function provides conventionality key lock and password lock operations.
• Ring detector is designed to prevent illegal dialing from pocket dialer.
• 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
EM91401A
EM91401B
EM91401C
EM91401D
Note : PDP = Pocket Dialer Prevented
* This specification are subject to be changed without notice.
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
LNB
KT
HOLD(music)
√
√
√
√
√
√
√
√
AND DUAL-TONE MELODY GENERATOR
AND DUAL-TONE MELODY GENERATOR
LOCK
√
√
√
√
√
√
EM91401 SERIES
EM91401 SERIES
HF
SDO(LCD)
PDP
√
√
√
√
√
√
10.1.1997
1
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Summary of Contents for EMC EM91401 Series
- Page 1 AND DUAL-TONE MELODY GENERATOR GENERAL DESCRIPTION The EM91401 is a series of tone/pulse switchable dialers that is composed of T/P dialer. The EM91401 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.
- Page 2 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR EM91401 Pin Assignment EM91401BP EM91401AP COL4/KT COL4/KT COL3 ROW4 COL3 ROW4 COL2 ROW3 COL2 ROW3 COL1 ROW2 COL1 ROW2 ROW1 ROW1 XOUT XOUT XMUTE XMUTE DTMF DTMF EM91401DK...
- Page 3 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR FUNCTIONAL BLOCK DIAGRAM RMUTE HFO HDO XMUTE COL1 Row/Column Keyboard COL2 Output circuit programming counter COL3 interface COL4/KT (column) COL5 latch Memory DTMF & (Melody) converter decoder Oscillator...
- Page 4 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR Symbol 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.
- Page 5 AND DUAL-TONE MELODY GENERATOR FUNCTION DESCRIPTIONS Dialing signal selection The EM91401 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.
- Page 6 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR 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.
- Page 7 Note : F=floating (high impedance); H=logic “High”; L=logic “Low” level. Music on Hold EM91401 series built-in a melody generator to generate dual-tone music on DTMF output pin. The music is designed for telephone line at line holding. * This specification are subject to be changed without notice.
- Page 8 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR 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 ).
- Page 9 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR 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.
- Page 10 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR 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).
- Page 11 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR ELECTRICAL CHARACTERISTIC (Ambient temperature is 25°C, V =2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz) Parameter Sym. Min. Typ. Max. Unit Condition Keyboard debounce time Key tone signal: frequency ○...
- Page 12 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR DTMF output frequency (fosc = 3.579545 MHz) Keyboard scan pin CCITT standard (Hz) Actual output (Hz) Deviation (%) ROW1 (f1) 699.1 0.30 ROW2 (f2) 766.2 0.49 ROW3 (f3) 847.4...
- Page 13 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR TIMING DIAGRAM KEY IN XMUTE Tidp Tidp DTMF OSC. Tdly Hi-impedance Figure 1. Pulse mode operating timing KEY IN XMUTE Titp Titp DTMF OSC. Hi-impedance Figure 2. DTMF mode operating timing * This specification are subject to be changed without notice.
- Page 14 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR LNB=2,3 RD/P KEY IN XMUTE Tidp Tidp DTMF OSC. Tdly Hi-impedance Figure 3. Pulse mode LNB redial timing LNB=2,3 RD/P KEY IN XMUTE Titp Titp DTMF OSC. Tdly Hi-impedance Figure 4.
- Page 15 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR RD/P KEY IN XMUTE Tidp Tidp DTMF OSC. Hi-impedance Figure 5. Pause key operating timing KEY IN XMUTE DTMF OSC. Hi-impedance Figure 6. Pulse to Tone (P→T) operating timing...
- Page 16 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR KEY IN sT b0 b1 b2 b3 b4 b5 spT spT Tbit Hi-impedance <Note>L=LSB,M=MSB, sT=START bit time, spT=STOP bit time Figure 8. SDO operating timing HD @ KEY IN...
- Page 17 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR Toff RING DRING 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)
- Page 18 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR APPLICATION CIRCUIT EM91401 series Application circuit * This specification are subject to be changed without notice. 10.1.1997...
- Page 19 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR EM32100 Application Circuit : 8/10 Digits LCD Pannel SEG5 SEG17 SEG4 SEG18 SEG3 SEG19 SEG2 SEG20 SEG1 SEG21 EM32100 COM1 SEG22 COM2 SEG23 COM3 SEG24 TEST2 SW?A TESTI...
- Page 20 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR EM32116 Application Circuit : .1uF .1uF 32768Hz .1uF 470K CALENDAR HOUR Hook Switch detection circuit .1uF LINE C945 SW HOOK 100K 1.5V TEST MODE 24/12 TEST2 ENRTC BATCKOF...
- Page 21 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR PACKAGE INFORMATION Example : 91401 P (1) ELAN MICRO. pefix (2) Type number (3) Package code: P→PDIP K→Skinny R→SDIP 18/20/28 Lead Plastic Package 18 PDIP 20 PDIP 28 PDIP...
- Page 22 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR 22/24 Lead Plastic Package-Skinny 22 PDIP (skinny) 24 PDIP (skinny) MILIMETERS INCHES MILIMETERS INCHES MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. 4.752 .180 4.572 .180 0.381 .015 0.381...
- Page 23 EM91401 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR 42 SDIP Package A A2 42 SDIP MILIMETERS INCHES MIN. MAX. MIN. MAX. 5.08 0.200 0.381 0.015 3.937 4.191 0.155 0.165 0.356 0.559 0.014 0.022 0.914 1.116 0.036 0.044...
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