PSB 21393 H V1.3 Infineon Technologies, PSB 21393 H V1.3 Datasheet - Page 146

• Manufacturer Part Number: PSB 21393 H V1.3
• Description: IC CODEC W/TRANSCEIVER MQFP-44
• Manufacturer: Infineon Technologies
• Series: SCOUT™r

Specifications of PSB 21393 H V1.3

• Function: CODEC
• Interface: IOM-2, SCI, UPN
• Number Of Circuits: 1
• Voltage - Supply: 3.3V, 5V
• Current - Supply: 27mA
• Mounting Type: Surface Mount
• Package / Case: 44-BQFP
• Includes: Activation and Deactivation, Channel Handler, DTMF / Tone / Ringing Generator, HDLC Controller, Speakerphone, UPN Transceiver
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Operating Temperature: -
• Other names: PSB21393HV1.3XT; PSB21393HV13XP; SP000007533; SP000007534

Data Sheet
4.4.5
The Automatic Gain Control of the receive direction AGCR (see figure 74) is similar to
the transmit AGC. One additional parameter (AAR) offers more flexibility since the
AGCR is able to attenuate signals as well. Depending on the parameters AAR and AGR
different behaviours of the AGCR are possible as figure 75 illustrates. For example with
AGR set to 0dB and AAR set to maximum (-48 dB) the AGCR acts as a limiter.
The AGCR is working only together with the speakerphone function (GCR.SP=1). The
digital gain stage LGAR is always enabled in speakerphone mode, independent of the
setting of GCR.AGCR.
It is highly recommended to program reasonable amplifications in the digital gain stages.
Otherwise the ASP will run into saturation above the 3.14 dB PCM-value.
Note that the speech detector for the receive direction is supplied with the signal that
comes out of the AGR-block unless XCR.PGCR = ’1’.
Figure 74
Function of the Receive AGC
Automatic Gain Control of the Receive Direction (AGCR)
136
PSB 21391
PSB 21393
2001-03-07
Codec