
V.90/K56flex Modem Device Sets with SmartDAA Technology for Low Power Applications 
SmartACFL
Doc. No. 100444A
Conexant
13
Proprietary Information
MDP (P9373) Hardware Pins and Signals
General
The major functional application signals are
summarized below.
System Control and Status
The following discrete signals are used by the host to
control and monitor MDP operation:
 Wakeup Reset (WKRES#); input
 Interrupt Request for MDP Interface (IRQ); output
 Raw Ring (SSD_RING#); output
 Ring Wake Reset (SSD_RINGWAKE#); output
 SmartDAA Interrupt for SmartDAA Interface
(SSD_INT); output
Digital Speaker Interface
The following output is used for audible call progress
or carrier monitoring in Data/Fax mode only where
sound quality is not important.
 Digital Speaker Output (DSPKOUT); output
Host Parallel Bus Interface
The parallel address, data, and control signals are:
 Address Lines (A[6:0]); input
 Data Lines (D[7:0]), input/output
 Chip Select (CS#); input
 Read Enable (READ#); input
 Write Enable (WRITE#); output
Host Serial Data Interface
The serial data and clock signals are:
 Receive Data (RXD); output
 Receive Data Clock (RXCLK); output
 Transmit Data (TXD); input
 Transmit Data Clock (TXCLK); output
Host Serial Voice Interface (S models)
The serial data and clock signals are:
 Serial Data Out (SI_DD); output
 Serial Data In (SI_DU); input
 Serial Shift Clock (SI_CLK); input
 Sample Shift Clock (SI_FRAME); input
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
The VC interface signals are:
 Sleep (IASLEEP); output
 Master Clock (M_CLK); output
 Voice Serial Clock (V_SCLK); output
 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
MDP Signal Interface and Pin Assignments
The MDP (P9373) 100-pin TQFP hardware interface
signals are shown in Figure 5.
The MDP (P9373) 100-pin TQFP pin signals are
shown in Figure 6.