DEMOBOARD-U4091BM Atmel, DEMOBOARD-U4091BM Datasheet
DEMOBOARD-U4091BM
Specifications of DEMOBOARD-U4091BM
Related parts for DEMOBOARD-U4091BM
DEMOBOARD-U4091BM Summary of contents
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Features • Speech Circuit with Anti-clipping • Tone-ringer Interface with DC/DC Converter • Speaker Amplifier with Anti-distortion • Power-supply Management (Regulated and Unregulated) and a Special Supply for Electret Microphone • Voice Switch • Interface for Answering Machine and Cordless ...
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Figure 1-1. Block Diagram Speech U4091BM-R 2 Voice circuit switch Serial bus DTMF Audio amplifier Clock Data MCU Reset Tone ringer 4872A–CORD–08/05 ...
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Figure 1-2. Detailed Block Diagram 4872A–CORD–08/05 U4091BM-R 3 ...
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Pin Configuration Figure 2-1. Pinning SSO44 U4091BM RECIN 44 2 TXACL 43 3 MIC3 MIC2 5 MIC1 RECO2 7 38 RECO1 IND SENSE 10 U4091BM 35 ...
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Table 2-1. Pin Description Function Pin Symbol 1 RECIN Receive amplifier input 2 TXACL Time constant adjustment for transmit anti-clipping 3 MIC3 Microphone input for hands-free operation 4 MIC2 Input of symmetrical microphone amplifier with high common-mode rejection ratio 5 ...
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Table 2-1. Pin Description Function Pin Symbol 40 AMPB Input for playback signal of answering machine 41 AMREC Output for recording signal of answering machine 42 STO Output for connecting the sidetone network 43 STC Input for sidetone network 44 ...
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Power down (pulse dialing) When the chip is in power-down mode (bit LOMAKE), for example, during pulse dialing, all internal blocks are disabled via the serial bus. In this condition, the voltage regula- tors and their internal band gap ...
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Table 6-1. 7. Clock Output Divider Adjustment The pin OSCOUT is a clock output which is derived from the crystal oscillator. It can be used to drive a microcontroller or another remote component and thereby reduces the number of crys- ...
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DTMF Dialing The DTMF generator sends a multi-frequency signal through the matrix to the line. The signal is the result of the sum of two frequencies and is internally filtered. The frequencies are chosen from a low and a ...
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Table 10-4. Table 10-5. Decimal U4091BM-R 10 DTMFF4 ...
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Figure 10-1. Write Cycle CLOCK DATA D7 D6 Figure 10-2. Normal Read Cycle CLOCK DATA A3 A2 Data from µP Figure 10-3. Fast Read Cycle 4872A–CORD–08/05 Write cycle Data from P Normal read cycle ...
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Table 10-6. Names and Functions of the Serial Registers Register Group No. R0B0 R0B1 R0B2 R0B3 R0 Enables R0B4 R0B5 R0B6 R0B7 R1B0 R1B1 R1B2 R1B3 R1 Enables R1B4 R1B5 R1B6 R1B7 R2B0 R2B1 R2B2 R2B3 R2 Matrix R2B4 R2B5 ...
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Table 10-6. Names and Functions of the Serial Registers (Continued) Register Group No. R4B0 R4 Matrix R4B1 R4B2 R4B3 R4B4 R4B5 R4B6 R4B7 R5B0 AGATX R5 R5B1 MICLIM R5B2 R5B3 R5B4 R5B5 R5B6 R5B7 R6B0 R6B1 R6B2 R6B3 Shut down ...
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Table 10-6. Names and Functions of the Serial Registers (Continued) Register Group No. R9B0 R9B1 R9B2 R9B3 R9 AFS R9B4 R9B5 R9B6 R9B7 R10B0 R10B1 R10B2 R10B3 R10 SA R10B4 R10B5 R10B6 R10B7 R11B0 R11B1 R11B2 R11B3 R11 ADC R11B4 ...
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Table 10-6. Names and Functions of the Serial Registers (Continued) Register Group No. R14B0 R14B1 R14B2 R14B3 TM R14 CLOR R14B4 R14B5 R14B6 R14B7 R15B0 R15B1 R15B2 R15B3 R15 CLOT R15B4 R15B5 R15B6 R15B7 10.1 Power-on Reset To avoid undefined ...
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Acoustic Feedback Suppression Acoustical feedback from the loudspeaker to the hands-free microphone may cause instability of the system. The U4091BM-R has a very efficient feedback-suppression circuit which offers a 4-point or (alternatively) a 2-point signal-sensing topology (see Two attenuators ...
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Figure 12-2. Power-on Reset (Line) Figure 12-3. Power-on Reset (Ringing) Figure 12-4. Power-on Reset (Low Voltage Reset) 4872A–CORD–08/05 Line LID IVDD OSCOUT t on VMP Reset 4 start-up oscillator on VRING ...
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Dial-tone Detector The dial-tone detector is a comparator with one side connected to the speaker amplifier input and the other to VM with a 35-mV offset (see mode, and the incoming signal is greater than 35 mV (25 mV ...
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Table 12-1. Note: LOGT > CLOGR LOGT < CLOGR LOGR < CLOGT LOGR > CLOGT BNMT detects speech BNMT detects noise BNMR detects speech BNMR detects noise 12.4 Term Definitions 1. Transmit means the transmit attenuator is fully on, and ...
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Summary of Truth Table 1. The circuit will switch to transmit mode if – Both transmit level detectors sense higher signal levels than the respective receive – The transmit background-noise monitor indicates the presence of speech 2. The circuit ...
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Figure 12-5. Dial Tone Detector Figure 12-6. Background Noise Monitor Figure 12-7. Generation of Control Voltage (CT) for Mode Switching 4872A–CORD–08/05 IN OUT + - DTD TLDR + + (TLDT) - ...
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Figure 12-8. Block Diagram Hands-free Mode U4091BM-R 2-point Signal Sensing Figure 12-9. Block Diagram Hands-free Mode U4091BM-R 4-point Signal Sensing MICRO U4091BM-R 22 TXA MICRO AFS control SA SAI TXA LOGT BNMT Mode control CLOGR AFS control SA SAI LOG ...
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Analog-to-Digital Converter (ADC) This circuit is a 7-bit successive-approximation analog-to-digital converter in switched capacitor technique. An internal band gap circuit generates a 1.25-V reference voltage which is the equiv- alent of 1 MSB (1 LSB = 19.5 mV). The ...
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... V3 = (2.5V / 0.4) VMPS V4 = (2.5V / 0.4) VMP V5 = (2.5V / 0.4) TLDR – Ref) p TLDT – Ref) p Not used - SAO1 V4 = (2.5V / 0.4) Offcan1 Atmel’s internal use Offcan2 - Offcan3 - Not used - Not used - Not used - D / 128 D / 128 D / 128 D / 128 D / 128 D / 128 D / 128 4872A–CORD–08/05 ...
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Switch Matrix The switch matrix has 5 inputs and 5 outputs. Every pair of I/Os except AGCO and AGCIN can be connected. The inputs and outputs used must be enabled more inputs are switched to an ...
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Table 14-1. Register U4091BM-R 26 Bits and Corresponding Switches No. Name Description R2B0 I1O1 Switch on MIC/LTX R2B1 I1O2 Switch on MIC/RXLS R2B2 I1O3 Switch on MIC/EPO R2B3 I1O4 Switch on MIC/AMREC R2B4 I1O5 Switch on MIC/AGCI ...
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Sidetone System Figure 15-1. Principle Circuit of Sidetone Balancing LRX AGARX 9 dB The Sidetone Balancing (STB) has the task of reducing the cross-talk from LTX (microphone) to LRX (earpiece) in the frequency range of ...
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The 3 programmable parameters are 1. LF (gain at low frequency) LF has 15 programming steps of 0.5 dB LF(0) provides –2 dB gain, LF(15) provides 5.5 dB gain STO_DIFF(LF) = (–10 dB – 0 ...
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Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated ...
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Electrical Characteristics (Continued kHz, 0 dBm = 775 mV , IVMIC = 0.3 mA, IMP = 3 mA, R rms RLS = nF, resonator 3.58 MHz, all bits in ...
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Electrical Characteristics (Continued kHz, 0 dBm = 775 mV , IVMIC = 0.3 mA, IMP = 3 mA, R rms RLS = nF, resonator 3.58 MHz, all bits in ...
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Electrical Characteristics (Continued kHz, 0 dBm = 775 mV , IVMIC = 0.3 mA, IMP = 3 mA, R rms RLS = nF, resonator 3.58 MHz, all bits in ...
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Electrical Characteristics (Continued kHz, 0 dBm = 775 mV , IVMIC = 0.3 mA, IMP = 3 mA, R rms RLS = nF, resonator 3.58 MHz, all bits in ...
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Electrical Characteristics (Continued kHz, 0 dBm = 775 mV , IVMIC = 0.3 mA, IMP = 3 mA, R rms RLS = nF, resonator 3.58 MHz, all bits in ...
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Test Circuits Figure 19-1. Basic Test Circuit 4872A–CORD–08/05 U4091BM-R 35 ...
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Figure 19-2. Test Circuit for Ringing U4091BM-R 36 4872A–CORD–08/05 ...
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Bus Timing Figure 20-1. Bus Timing Diagram SDA t wSTA SCL hSTA 21. Ordering Information Extended Type Number U4091BM-RFNGY U4091BM-RFNG3Y T4091R-DDB 22. Package Information Package SSO44 Dimensions in mm 0.3 0 4872A–CORD–08/ ...
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