PSB 21373 H V1.1 Infineon Technologies, PSB 21373 H V1.1 Datasheet - Page 105

• Manufacturer Part Number: PSB 21373 H V1.1
• Description: IC SPEECH AND VOICE MQFP-44
• Manufacturer: Infineon Technologies
• Series: SCOUT™r

Specifications of PSB 21373 H V1.1

• Function: CODEC
• Interface: IOM-2, SCI
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 97.5mA
• Mounting Type: Surface Mount
• Package / Case: 44-BQFP
• Includes: Activation and Deactivation, Channel Handler, DTMF / Tone / Ringing Generator, HDLC Controller, Speakerphone, Voice Monitoring
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Operating Temperature: -
• Other names: PSB21373HV1.1XT; PSB21373HV11XT; SP000007602

PSB 21373
The controlling and programming of the various operation modes, configurations and
coefficients can be done via the microcontroller interface or the IOM-2 monitor channel
and is described in the corresponding interface section. An overview on these
programmable parameters can be found in chapter 4.8.
4.1
Analog Front End (AFE) Description
The Analog Front End section of the codec is the interface between the analog
transducers and the digital signal processor. In the transmit direction the AFE function is
to amplify the transducer input signals (microphones) and to convert them into digital
signals. In the AFE receive section the incoming digital signal is converted to an analog
signal which is output to an ear piece and/or a loudspeaker.
The three AFE configuration registers (ACR, ATCR, ARCR) provide a high flexibility to
accommodate an extensive set of user procedures and terminal attributes.
•Figure 56 shows the block diagram of the Analog Front End:
.
DREF
Figure 56
Block Diagram of AFE
Two differential inputs (MIP1/MIN1 and MIP2/MIN2) and one single-ended input (AXI)
can be connected to the amplifier AMI via an analog input multiplexer (ATCR.AIMX). The
programmable amplifier AMI (ATCR.MIC) provides a coarse gain adjustment range from
Data Sheet
105
2002-05-13