as2525 austriamicrosystems, as2525 Datasheet
as2525
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as2525 Summary of contents
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... LD/MF dialler, tone ringer with dc/dc converter and serial interface to EEPROM and LCD-driver (AS2591), all pin package. The circuit is fully line powered. The AS2525 uses an external EEPROM for a 32 digit last number redial storage and memories for 28 numbers each containing digits/data. ...
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... Datasheet AS2525 Pin Description Pin # Symbol Type C 1 CS2 DO Chip select signal for external LCD driver circuit LED If signal is not activated, a pull down resistor (100 inserted DPn DO Digital output that holds the line during off-hook operation or pulls low during break periods of pulse dialing and flash ...
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... Datasheet AS2525 Pin # Symbol Type REC 19 RECI AI Analogue input for the handsfree receive path. Should be connected to RO via a coupling capacitor. REC 20 RECV AI Analogue input for receive voice switching path Output for driving a dynamic earpiece with an impedance from 150 V 22 ...
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... Datasheet AS2525 Pin # Symbol Type Data output of 3-wire bus. A 100 k If signal is not activated, a pull down resistor (100 inserted CS1 DO Chip select signal for external EEPROM. If signal is not activated, a pull down resistor (100 inserted. DI: Digital Input ...
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... Datasheet AS2525 Key Definitions and Procedures Table 1: Key definitions Key Condition [0] - [9], Off-hook [#], [ ] LD mode [ ] Speech mode [PG] Program mode Speech mode Mute state [MT] Program mode [R/P] Program state [FL] [V+] Speech mode [V-] Speech mode [MR] [M1] - [M8] [SH] Table 2: Digits DTMF Mode Digit Key ( LOW ...
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... Datasheet AS2525 Table 3: Parameter settings Parameter Symbol Inter-Digit Pause (LD) IDP MF Tone Duration TD MF Inter-Tone Pause ITP Flash 1 Duration FL1 Flash 2 Duration FL2 Pause 1 Duration P1 Pause 2 Duration P2 Pre-Digit Pause (LD) PDP Post Flash Pause PFP Tx Gain, Handset A TX-HS Rx Gain, Handset A RX-HS Tx Gain, Handsfree ...
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... Datasheet AS2525 Parameter Symbol Flash 1 During LD Flash 2 During LD Extended LCD Symbols Tx Soft Clip, Handsfree Rx Soft Clip, Handsfree Voice Switching, Speed Handset/Headset Volume LCD Test Temporary with tone Key Lock Function Pin Select “DM/HM” DM/HM Ringer Off Function Key Test Volume Control on ...
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... Datasheet AS2525 Table 5: User programming with PIN code Function Symbol Call Restriction 1 CR1 Call Restriction 2 CR2 Key Lock Clear All Memories Reset To Factory Settings Change PIN Code PIN Table 6: Mode programming Function Symbol Select Flash FL Select Dialing Mode 1 DM Select Pause Time ...
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... AS2525 Figure 3: Memory allocation for external EEPROM The AS2525 is writing and reading to and from area B and C during normal operation and user-code programming. Area A is protected during normal operation and contains a back-up copy of the factory settings. This back-up copy can be loaded into area B by the user with the user-code programming procedure " ...
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... Datasheet AS2525 Side-Tone A good side-tone cancellation can be achieved by using the following equation BAL LINE This is assuming that the side-tone reference resistor, R2 (between LI and STB) is 300 and ohm Z LINE Z BAL R2 = 300 ohm Figure 5: Side-tone balance Transmit Path The gain of the M1/M2 —> LS path is default set to 37 dB. ...
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... Datasheet AS2525 Table 13: Handset Rx soft clipping selection [PG] + [0] + (Password) + [#] + [5] + (digit) + [PG] Digit Handset Rx Soft Clipping (Earpiece) [0] Disabled [1] Enabled There is LLC option for this path. The gain of the LS —> LO1/LO2 receive path is set to 29 dB. This gain can be changed by set-up programming from - steps. ...
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... Datasheet AS2525 LINE +14dB +8dB Offset Compress comp +3dB FT2 CTXoffset RO Offset Compress comp RECV RECI Table 18: Handsfree attenuation scheme Speech Mode RX > TX_atten X Receive TX_atten > Idle TX_atten > RX Yes Transmit RX-mode Vol max Vol default Revision 2.1 Gmax = +9dB Gmin = -21dB … -40dB (VOL) ...
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... Datasheet AS2525 Loudhearing A loudhearing mode can be enabled/disabled through the set-up programming. Table 19: Loudhearing mode selection [PG] + [0] + (Password) + [#] + [7] + (digit) + [PG Digit Loudhearing [0] Enabled ( provided) [1] Disabled (only HF is provided) Headset mode Head set mode is selected by connecting pin "HEAD" to VDD and enabling the head function by service code programming (see also Table 3: Parameter settings) ...
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... Datasheet AS2525 Dialing and Control Functions Valid Keys The key scanning is enabled in off-hook mode with V above valid key is detected from the keyboard by REF connecting the appropriate row to the column ( This can be done using keyboard matrix with single contacts. Three diodes and a resistor are used to extend the number of rows (see Figure 1: Keyboard Layout) ...
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... Datasheet AS2525 4. Press [PG] (= store and exit on-hook to abort Reset to Factory Settings It is possible to reset all settings to the default factory settings with following procedure: 1. Press [PG] to enter program mode 2. Press [1] + (PIN) + [#] + [8] 3. Press [1] for reset 4. Press [PG] (= store and exit on-hook to ...
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... Datasheet AS2525 Memory Storing Procedure numbers, each with maximum 24 digits, can be stored into the external EEPROM. The store procedure is as follows: 1. Press [PG] to enter program mode 2. Enter location (MR + digit Enter number 4. Press [PG] to store and exit or go on-hook to abort 5 ...
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... After on-hook (debounced) After first rising edge at FCI After PG is terminated After pressing [V+]/[V-] See also AS2591 data sheet for further information. LCD Control Level (dBr) The AS2525 is designed to work together with the LCD Loudspeaker driver AS2591 (see also AS2591 data sheet). - ...
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... Datasheet AS2525 Electrical Characteristics Absolute maximum ratings Positive Supply Voltage Input Current Input Voltage (LS) Input Voltage (LI, CS) Input Voltage (STB, RI) Digital Input Voltage Electrostatic Discharge Storage Temperature Range Total Power Dissipation * Exceeding these figures may cause permanent damage. Functional operation under these conditions is not permitted. ...
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... Datasheet AS2525 AC Electrical Characteristics mA 800 Hz; ZAC = 1000 ; recommended operating conditions and default settings unless otherwise specified. LINE Transmit Symbol Parameter A Transmit Gain, default TX Variation with Frequency THD Distortion V Soft Clip Level AGC A Soft Clip Overdrive SCO t Attack Time DECAY ...
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... Datasheet AS2525 Receive Symbol Parameter A Receive Gain, Default RX A Volume Control Range RX-VOL Variation with Frequency A RX THD Distortion, RO Distortion, LO1/LO2 V Soft Clip Level AGC A Soft Clip Overdrive SCO t Attack Time DECAY t Decay Time DECAY V Noise Output Voltage Unwanted Frequency ...
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... Datasheet AS2525 DTMF Symbol Parameter DF Frequency Deviation V MF Tone Level (Low Group Tone Level Range at LS MF-RANGE (Low Group) Pre-emphasis, Low to High V L_H V Unwanted Frequency UFC Components t Tone Duration, Minimum TD t Inter Tone Pause, Min. ITP t Tone Rise Time ...
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... Datasheet AS2525 Tone Ringer Symbol Parameter F1 Frequency 1 F2 Frequency 2 F3 Frequency 3 t Detection Time DT f Min. Detection Frequency MIN f Max. Detection Frequency MAX Pacifier Tone Symbol Parameter V Tone Output Level, RO PARO Tone Output Level, LO1/2 f Frequency PT t Tone Burst Duration TBD ...
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... Datasheet AS2525 Timing Diagrams LD dialling MUTE MASK DPN t t IDP PDP LD dialling with access pause MUTE MASK DPN t t IDP PDP MF dialling MUTE MASK DPN TONE ITP Revision 2 Pause ...
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... Datasheet AS2525 Test Circuit A 100 µ I LINE 600 ohm 327 BC 327 Revision 2 µ ohm RI 11 STB 300 ohm 1 µ Vss µ CS1 CLK 1 CS2 2 DPn ...
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... Datasheet AS2525 Typical Application Revision 2.1 Figure 11: Typical application Page ...
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... revision Revision 2.1 Ordering Information Number AS2525 Q AS2525 F Devices sold by austriamicrosystems AG are covered by the warranty and patent identification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied description OSC regarding the information set forth herein or regarding the LED freedom of the described devices from patent infringement ...
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... Datasheet AS2525 Contact Headquarters austriamicrosystems AG Communications Business Unit A 8141 Schloss Premstätten, Austria T. +43 (0) 3136 500 0 F. +43 (0) 3136 525 01 www.austriamicrosystems.com Sales Offices Germany austriamicrosystems Germany GmbH Tegernseer Landstrasse 85 D-81539 München, Germany Phone: +49/89/693643-0 Fax: +49/89/693643-66 France austriamicrosystems France S.a.r.l. 124, Avenue de Paris ...