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EM91203C Dataheets PDF



Part Number EM91203C
Manufacturers ELAN Microelectronics Corp
Logo ELAN Microelectronics Corp
Description TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
Datasheet EM91203C DatasheetEM91203C Datasheet (PDF)

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE EM91203 SERIES EM91203 SERIES GENERAL DESCRIPTION The EM91203 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 3 sets memories. The EM91203 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 (.

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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE EM91203 SERIES EM91203 SERIES GENERAL DESCRIPTION The EM91203 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 3 sets memories. The EM91203 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. • 3-set one 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 EM91203A EM91203B EM91203C LNB √ √ √ KT √ √ √ SAVE √ √ √ HF √ √ SDO(LCD) PMUTE √ √ √ √ * This specification are subject to be changed without notice. 10.1.1997 1 EM91203 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE EM91203 Pin Assignment EM91203AP COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 PM PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF EM91203BP COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 PM PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO EM91203CK NC COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 SDO PM PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO Keyboard Arrangement Type A ROW1 ROW2 ROW3 ROW4 COL1 1 4 7 */T COL2 2 5 8 0 COL3 3 6 9 # COL4/KT SAVE F RD/P COL5 EM1 EM2 EM3 ST Type B ROW1 ROW2 ROW3 ROW4 COL1 1 4 7 * COL2 2 5 8 0 COL3 3 6 9 # COL4/KT SAVE F P→T RD/P COL5 EM1 EM2 EM3 ST FUNCTIONAL BLOCK DIAGRAM SDO HFO PM XMUTE COL1 COL2 COL3 COL4/KT COL5 Keyboard interface (column) Memory XIN XOUT latch & decoder D/A converter DTMF Output circuit Row/Column programming counter Oscillator Timing/Control circuit ROW1 Keyboard interface (Row) Input circuit Pulse generator PO ROW4 ~ VDD HFI HKS VDD * This specification are subject to be changed without notice. 10.1.1997 2 EM91203 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE PIN DESCRIPTIONS Symbol ROW1~ROW4 Function 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. 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. 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. 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. 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. 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) output pin. Normally, this pin stays“Low” level. In Tone d.


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