CX11250 View Datasheet(PDF) - Conexant Systems

Part Name

Description

Manufacturer

CX11250

SmartHSF™ Mobile Modem

Conexant Systems 

SmartHSF Mobile Modem Data Sheet

3.3 CX20437 VC HARDWARE PINS AND SIGNALS (S MODELS)

Microphone and analog speaker interface signals, as well as telephone handset/headset interface signals are provided to

support functions such as speakerphone mode, telephone emulation, microphone voice record, speaker voice playback, and

call progress monitor.

3.3.1 VC Signal Interfaces

Speakerphone Interface

The following signals are supported:

• Speaker Out (M_SPKR_OUT); analog output - Should be used in speakerphone designs where sound quality is important

• Microphone (M_MIC_IN); analog input

Telephone Handset/Headset Interface

The following interface signals are supported:

• Telephone Input (M_LINE_IN), input (TELIN) –Optional connection to a telephone handset interface circuit

• Telephone output (M_LINE_OUTP); output (TELOUT) - Optional connection to a telephone handset interface circuit

• Center Voltage (VC); output reference voltage

HSD Interface

The following interface signals are supported:

• Reset (POR); input

• Sleep (SLEEP); input

• Master Clock (M_CLKIN); input

• Serial Clock (M_SCK); output

• Control (M_CNTRLSIN); input

• Serial Frame Sync (M_STROBE); output

• Serial Transmit Data (M_TXSIN); input

• Serial Receive Data (M_RXOUT); output

3.3.2 VC Interface Signals, Pin Assignments, and Signal Definitions

VC 32-pin TQFP hardware interface signals are shown by major interface in Figure 3-5, are shown by pin number in Figure

3-6, and are listed by pin number in Table 3-7.

VC hardware interface signals are defined in Table 3-8.

VC pin signal DC electrical characteristics are defined in Table 3-9.

VC pin signal analog electrical characteristics are defined in Table 3-10.

100553B

Conexant

3-21

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