RCV56HCF PCI/CardBus Modem Designer’s Guide
Table 3-4.  MDP Pin Signal Definitions
| Label | I/O Type | Signal/Definition | 
| 
 | 
 | OVERHEAD SIGNALS | 
| XTLI | I | Crystal Int. Connect the BIF MODEMCLK pin through a 33 Ω resistor. | 
| XTLO | O | Crystal Out. Leave open. | 
| VDD, | PWR | Digital Power Supply. To +3.3V and digital circuits power supply filter. | 
| AVDD | 
 | 
 | 
| 
 | 
 | 
 | 
| AVAA | PWR | Analog Power Supply. To +3.3V and analog circuits power supply filter. | 
| GND | GND | Digital Ground. Connect to digital ground. | 
| AGND | GND | Analog Ground. Connect to analog ground. | 
| SET3V# | IA | Set 3.3V Analog Reference. Connect to digital ground. | 
| 
 | 
 | BIF TO MDP INTERFACE | 
| IA | Address Lines  | |
| IA/OA | Data Line  | |
| READ# | IA | Read Enable. Connect to BIF DRD# pin. | 
| WRITE# | IA | Write Enable. Connect to BIF DWR# pin. | 
| RESET1#, | IA | External Device Active Low Reset. Connect to the BIF DRESET# pin. | 
| RESET2# | 
 | 
 | 
| 
 | 
 | 
 | 
| WKRES# | OA | Wakeup Reset. Active low  | 
| CS# | IA | Chip Select. CS# output low selects the MDP. Connect to the BIIF MODEM_CS# pin. | 
| IRQ | OA | Interrupt Request. MODEM_IRQ is the active low interrupt request from the MDP. Connect to the BIF | 
| 
 | 
 | MODEM_IRQ pin. | 
| M_TXCLK | OA | Modem Transmit Clock. Connect to BIF M_TXCLK pin. | 
| M_TX | IA | Modem Transmit Data. Connect to BIF M_TX pin. | 
| M_RXCLK | OA | Modem Receive Clock. Connect to BIF M_RXCLK pin. | 
| M_RX | OA | Modem Receive Data. Connect to BIF M_RX pin. | 
| SI_FRAME | IA/OB | ISDN Frame. 8 kHz frame sync; rising edge starts frame. Connect to BIF SI_FRAME pin. | 
| SI_CLK | IA/OB | ISDN Clock. 1.536 MHz clock. Connect to BIF SI_CLK pin. | 
| SI_DD | OA | ISDN Data Downstream. Connect to BIF SI_DD pin. | 
| SI_DU | IA | ISDN Data Upstream. Connect to BIF SI_DU pin. | 
| 
 | 
 | MDP TO SIEMENS PSB2186 S/T INTERFACE | 
| IOM_FRAME | IA/OB | ISDN Frame Synchronization Clock. 8 kHz frame sync; rising edge starts frame. The start of the B1 | 
| 
 | 
 | channel in  | 
| 
 | 
 | 
 | 
| IOM_CLK | IA/OB | ISDN Clock. 1.536 MHz clock. Connect to the ISDN device DCL pin. | 
| IOM_DD | IA | ISDN Data Downstream. IOM data input synchronous to IOM_CLK. Connect to the ISDN device DOUT pin. | 
| IOM_DU | OA | ISDN Data Upstream. IOM data output synchronous to IOM_CLK. Connect to the ISDN device DIN pin. | 
| 
 | 
 | MDP TO SIEMENS PSB21910 U INTERFACE | 
| IOM_FRAME | IA/OB | ISDN Frame Synchronization Clock. 8 kHz frame sync; rising edge starts frame. The start of the B1 | 
| 
 | 
 | channel in  | 
| IOM_CLK | IA/OB | ISDN Clock. 1.536 MHz clock. Connect to the ISDN device DCL pin. | 
| IOM_DD | IA | ISDN Data Downstream. IOM data input synchronous to IOM_CLK. Connect to the ISDN device DOUT pin. | 
| IOM_DU | OA | ISDN Data Upstream. IOM data output synchronous to IOM_CLK. Connect to the ISDN device DIN pin. | 
| 1129 | ROCKWELL PROPRIETARY INFORMATION |