LSD20463 Просмотр технического описания (PDF) - Conexant Systems

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LSD20463

SmartHCF™ Mobile Modem

Conexant Systems 

SmartHCF Mobile Modem Designer’s Guide

The EEPROM interface signals are:

• Serial Data Input (SROMIN); input

• Serial Data Output (SROMOUT); output

• Clock (SROMCLK); output

• Chip Select (SROMCS); output

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.

3.1.2 HSD Interface Signals, Pin Assignments, and Signal Definitions

The HSD (P9573) 100-pin TQFP hardware interface signals are shown by major interface in Figure 3-1, are shown by pin

number in Figure 3-2 and are listed by pin number in Table 3-1.

The HSD hardware interface signals are defined in Table 3-2.

3-2

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100475A

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