LSD20463 データシートの表示（PDF） - Conexant Systems

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LSD20463

SmartHCF™ Mobile Modem

Conexant Systems 

SmartHCF Mobile Modem Designer’s Guide

3. HARDWARE INTERFACE

3.1 HSD (P9573) HARDWARE PINS AND SIGNALS

3.1.1 HSD Signal Interfaces

PCI Bus/MiniPCI/CardBus Host Interface

The Host Side Device conforms to the PCI Local Bus Specification Version 2.2, MiniPCI Specification Draft 1.0, and PC Card

Standard for CardBus. 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/MiniPCI/CardBus 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 (-PCI model)

− Status Change (STSCHG#), output (-CB model)

Power Detection and Switching

• Vaux Enable (VauxEN#); output (-PCI model)

• Vpci Enable (VpciEN#); output (-PCI model)

• 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 is also required to store the CIS table for

CardBus designs.

The EEPROM must be 2048 (128 x 16) bits or larger for PCI Bus/MiniPCI applications or 4096 (256 x 16) bits or larger for

CardBus applications, 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.

100475A

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3-1

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