SmartHSF Mobile Modem Data Sheet
LSD Interface (Through DIB)
The DIB interface signals are:
• Clock and Power Positive (PWRCLKP); output
• Clock and Power Negative (PWRCLKN); output
• Data Positive (DIB_DATAP); input/output
• Data Negative (DIB_DATAN); input/output
VC Interface (S Models)
The VC interface signals are:
• Modem Sleep (IASLEEP); output
• Master Clock (M_CLK); output
• Voice Serial Clock (V_SCLK); input
• Voice Serial Control (V_CTRL); output
• Voice Serial Frame Sync (V_STROBE); input
• Voice Serial Transmit Data (V_TXSIN); output
• Voice Serial Receive Data (V_RXOUT); input
Telephone Handset Interface (S Models)
The telephone handset interface signals are:
• Voice Relay Control (VOICE#); output
• Handset Pickup Detect (H_PICKUP); input
Call Progress Speaker Interface
The call progress speaker interface signal is:
• Digital speaker output (DSPKOUT); output
DSPKOUT is a square wave output in Data/Fax mode used for call progress or carrier monitoring. This output can be
optionally connected to a low-cost on-board speaker, e.g., a sounducer, or to an analog speaker circuit.
PDC/PDC packet Interface
Nine lines, defined by the installed cell phone driver software, are available to support the PDC/PDC packet cellular phone
interface:
• Panel 1
• Panel 2
• ADP
• CELL_RXD
• CELL_TXD
• TCH_CLK
• TCH_TX
• TCH_RX
• TCH_FRAME
PHS Interface
Eleven lines, defined by the installed cell phone driver software, are available to support the PHS cellular phone interface.
• ASLP
• PSLP
• DFCK
• Ready
• DSDT
• USDT
• BITC
• UDT
• DDT
• UFCK
3-2
Conexant
100553B