PSB 21373 H V1.1 Infineon Technologies, PSB 21373 H V1.1 Datasheet - Page 23

• 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
2.1.1
Serial Control Interface (SCI)
The serial control interface (SCI) is compatible to the SPI interface of Motorola or
Siemens C510 family of microcontrollers.
The SCI consists of 4 lines: SCLK, SDX, SDR and CS. Data are transferred via the lines
SDR and SDX at the rate given by SCLK. The falling edge of CS indicates the beginning
of a serial access to the registers. Incoming data is latched at the rising edge of SCLK
and shifts out at the falling edge of SCLK. Each access must be terminated by a rising
edge of CS. Data is transferred in groups of 8-bits with the MSB first.
Figure 7 shows the timing of a one byte read/write access via the serial control interface.
Data Sheet
23
2002-05-13