SmartACFL

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V.90/K56flex Modem Device Sets with SmartDAA Technology for Low Power Applications

18

Conexant

Doc. No. 100444A

Proprietary Information

VC (20437) Hardware Pins and Signals

(S Models)

General

Microphone and analog speaker interface signals, as

well as telephone handset/head interface signals are

provided to support functions such as speakerphone

mode, telephone emulation, microphone voice

record, speaker voice playback, and call progress

monitor.

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

• Telephone Input (M_LINE_IN), input (TELIN) –

Optional connection to a telephone handset a

telephone handset interface circuit.

• Telephone output (M_LINE_OUTP); output

(TELOUT) - Optional connection to a telephone

handset interface circuit.

• Center Voltage (VC_HANDSET); output reference

voltage.

MDP 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.

VC Interface Signals and Pin Assignments

The VC (20437) 32-pin TQFP hardware interface

signals are shown by major interface in Figure 9.

The VC (20437) 32-pin TQFP pin signals are shown

in Figure 10.