Hayes Microcomputer Products RCV56HCF manual Host-Controlled Modem Software, Hardware Interfaces

RCV56HCF PCI/CardBus Modem Designer’s Guide

Speakerphone Mode (ISDN and SP Models)

The speakerphone mode features an advanced proprietary speakerphone algorithm which supports full-duplex voice conversation with both acoustic and line echo cancellation. Parameters are constantly adjusted to maintain stability with automatic fallback from full-duplex to pseudo-duplex operation. The speakerphone algorithm allows position independent placement of microphone and speaker.

The speakerphone mode provides hands-free full-duplex telephone operation under host control. The host can separately control volume, muting, and AGC in microphone and speaker channels.

Synchronous Access Mode (SAM)

V.80 and Rockwell Video Ready synchronous access modes between the modem and the host/DTE are provided for host- controlled communication protocols, e.g., H.324 video conferencing applications.

Voice-call-first (VCF) before switching to a videophone call is also supported.

1.3.3 Host-Controlled Modem Software

Host-controlled modem software performs processing of general modem control, command sets, fax Class 1, AudioSpan, DSVD, speakerphone, voice/audio/TAM, error correction, data compression, and operating system interface functions. Configurations of the modem software are provided to support modem models listed in Table 1-1.

Binary executable modem software is provided for the OEM.

1.3.4 Downloadable Modem Data Pump Firmware

Binary executable code controlling MDP operation is downloaded as required during operation.

1.3.5 Hardware Interfaces

1.3.5.1 PCI Bus Host Interface

The Bus Interface conforms to the PCI Local Bus Specification, Production Version, Revision 2.1, June 1, 1995. It is a memory slave (burst transactions) and a bus master for PC host memory accesses (burst transactions). Configuration is by PCI configuration protocol.

The following interface signals are supported:

∙Address and data

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

−Four 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 ; bidirectional

∙Interrupt

−Interrupt A (INTA#); output

∙System

−Clock (PCICLK); input

−Reset (PCIRST#); input

−Clock Running (CLKRUN#); input

1-8 ROCKWELL PROPRIETARY INFORMATION 1129