CX06833-3x/4x SMXXD Modem Data Sheet
3.2
3.2.1
3.2.1.1
3.2.1.2
3.2.1.3
3.2.1.4
CX20442 VC Hardware Pins and Signals (S Models)
CX20442 VC Signal Summary
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.
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
CX06833 Modem Interface
The following interface signals are supported:
• 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
Host Interface
The following interface signals are supported:
• Reset (POR); input
102228A
Conexant
3-17