11250-11 Ver la hoja de datos (PDF) - Conexant Systems

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11250-11

SmartHSF™ Mobile Modem

Conexant Systems 

SmartHSF Mobile Modem Data Sheet

3. HARDWARE INTERFACE

3.1 CX11250 HSD HARDWARE PINS AND SIGNALS

3.1.1 HSD Signal Interfaces

PCI Bus/Mini PCI Host Interface

The Host Side Device conforms to the PCI Local Bus Specification Version 2.2 and Mini PCI Specification Draft 1.0. It is a

memory slave and a bus master for PC host memory accesses (burst transactions). Configuration is by PCI configuration

protocol.

The PCI Bus/Mini PCI interface signals are:

• Address and data

− 32 bidirectional Address/Data (AD[31-0]); bidirectional

− 4 Bus Command and Byte Enable (CBE [3:0]); bidirectional

− Bidirectional Parity (PAR); bidirectional

• Interface control

− Cycle Frame (FRAME#); bidirectional

− Initiator Ready (IRDY#); bidirectional

− Target Ready (TRDY#); bidirectional

− Stop (STOP#); bidirectional

− Initialization Device Select (IDSEL); input

− Device Select (DEVSEL#); bidirectional

• Arbitration

− Request (REQ#); output

− Grant (GRANT#); input

• Error reporting

− Parity Error (PERR#); bidirectional

− System Error (SERR#); bidirectional

• Interrupt

− Interrupt A (INTA#); output

• System

− Clock (PCICLK); input

− Reset (PCIRST#); input

− Clock Running (CLKRUN#); input

− Power Management Event (PME#), output

Power Detection and Switching

• Vaux Enable (VauxEN#); output

• Vpci Enable (VpciEN#); output

• Vpci Detect (VpciDET); input

• Vaux Detect (VauxDET); input

Serial EEPROM Interface

A serial EEPROM is required to store the Device ID, Vendor ID, Subsystem ID, Subsystem Vendor ID, and Power

Management parameters for the PCI Configuration Space Header.

The EEPROM must be 2048 (128 x 16) bits or larger and be rated at 1MHz (SROMCLK is 537.6 kHz). For example, the

following EEPROMs or equivalent may be used: Microchip 93LC66B (256 x 16), 93LC56B (128 x 16), Atmel AT93C66 (256 x

16), AT93C56 (128 x 16). The EEPROM is programmable by the PC via the modem.

The EEPROM interface signals are:

• Serial Data Input (SROMIN); input

• Serial Data Output (SROMOUT); output

• Clock (SROMCLK); output

• Chip Select (SROMCS); output

100553B

Conexant

3-1

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