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RH56D-PCI Schematic ( PDF Datasheet ) - ETC

Teilenummer RH56D-PCI
Beschreibung MODEM DEVICE FAMILY FOR DESKTOP APPLICATIONS
Hersteller ETC
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Gesamt 30 Seiten
RH56D-PCI Datasheet, Funktion
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Conexant Proprietary Information
Dissemination or use of this information is not permitted
without the written permission of Conexant Systems, Inc.
Doc. No. 1213, Rev. 1
January 20, 1999






RH56D-PCI Datasheet, Funktion
RH56D-PCI Modem Designer’s Guide
List of Figures
Figure 1-1. RH56D-PCI System Overview ............................................................................................................................... 1-4
Figure 1-2. RH56D-PCI Hardware Configuration Block Diagram ............................................................................................. 1-5
Figure 1-3. Typical Audio Signal Interface (U.S.) ..................................................................................................................... 1-9
Figure 3-1. RH56D-PCI Major Hardware Interface Signals ...................................................................................................... 3-2
Figure 3-2. R6795 144-Pin TQFP Hardware Interface Signals ................................................................................................ 3-3
Figure 3-3. R6795 144-Pin TQFP Pin Signals.......................................................................................................................... 3-4
Figure 3-4. Schematic - R6795 Interface –Speakerphone Application................................................................................... 3-12
Figure 4-1. PCICLK Guard Band Technique ............................................................................................................................ 4-9
Figure 4-2. Receive Path Guard-Band, Merge between AGND-GND ...................................................................................... 4-9
Figure 4-3. Crystal Solution .................................................................................................................................................... 4-10
Figure 4-4. Power and Ground Distribution ............................................................................................................................ 4-10
Figure 4-5. Package Dimensions - 144-Pin TQFP ................................................................................................................. 4-14
List of Tables
Table 1-1. Modem Models and Functions ................................................................................................................................ 1-2
Table 1-2. Typical Signal Routing - Voice Mode .................................................................................................................... 1-10
Table 3-1. R6795 144-Pin TQFP Pin Signals........................................................................................................................... 3-5
Table 3-2. R6795 Pin Signal Definitions................................................................................................................................... 3-7
Table 3-3. Current and Power Requirements ......................................................................................................................... 3-13
Table 3-4. Absolute Maximum Ratings................................................................................................................................... 3-13
Table 3-5. Analog Electrical Characteristics........................................................................................................................... 3-14
Table 4-1. Crystal Specifications - Surface Mount ................................................................................................................. 4-12
Table 4-2. Crystal Specifications - Through Hole ................................................................................................................... 4-13
Table 5-1. PCI Configuration Registers.................................................................................................................................... 5-1
Table 5-2. Command Register ................................................................................................................................................. 5-2
Table 5-3. Status Register........................................................................................................................................................ 5-2
Table 5-4. Power Management Capabilities (PMC) Register ................................................................................................... 5-4
Table 5-5. Power Management Control/Status Register (PMCSR).......................................................................................... 5-4
Table 5-6. BIF Address Map..................................................................................................................................................... 5-5
Table 5-7. EEPROM Content for 256 Words by 16 Bits per Word ........................................................................................... 5-6
Table 5-8. EEPROM Content for 128 Words by 16 Bits per Word ........................................................................................... 5-6
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RH56D-PCI pdf, datenblatt
RH56D-PCI Modem Designer’s Guide
1.3 TECHNICAL OVERVIEW
1.3.1 General Description
The RH56D-PCI modem provides the processing core for a complete system design featuring data/fax modem, voice/TAM,
and speakerphone support, depending on specific model (Table 1-1).
Note: The term, “RH56D-PCI Device Set”, refers to the family of modem models listed in Table 1-1.
Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, audio interface, and
host interface functions are supported and controlled through the command set.
The modem hardware connects to the host processor via a PCI Bus interface. The OEM adds a crystal circuit, EEPROM,
telephone line interface, telephone handset interface (optional), and audio interface (optional) to complete the system.
1.3.2 Host Modem Software
The host modem software performs two distinct tasks:
1. General modem control which includes command sets, fax Class 1, voice/TAM, speakerphone, error correction, data
compression, and operating system interface functions.
2. Modem data pump control. Binary executable code controlling MDP operation is downloaded as required during
operation.
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.
1.3.3 Operating Modes
Data/Fax Modes
As a V.90/K56flex data modem, the modem can receive data from a digital source using a V.90- or K56flex-compatible central
site modem over the digital telephone network portion of the PSTN at line speeds up to 56 kbps. Asymmetrical data
transmission supports sending data up to V.34 rates. This mode can fallback to full-duplex V.34 mode, and to slower rates as
dictated by line conditions.
As a V.34 data modem, the modem can operate in 2-wire, full-duplex, asynchronous modes at line rates up to 33.6 kbps.
Data modem modes perform complete handshake and data rate negotiations. Using V.34 modulation to optimize modem
configuration for line conditions, the modem can connect at the highest data rate that the channel can support from 33600
bps down to 2400 bps with automatic fallback. Automode operation in V.34 is provided in accordance with PN3320 and in
V.32 bis in accordance with PN2330. All tone and pattern detection functions required by the applicable ITU or Bell standard
are supported.
In fax modem mode, the modem can operate in 2-wire, half-duplex, synchronous modes and can support Group 3 facsimile
send and receive speeds of 14400, 12000, 9600, 7200, 4800, or 2400 bps. Fax data transmission and reception performed
by the modem are controlled and monitored through the fax EIA/IA-578 Class 1 and T.31 Class 1.0 command interface. Full
HDLC formatting, zero insertion/deletion, and CRC generation/checking are provided.
Both transmit and receive fax data are buffered within the modem. Data transfer to and from the DTE is flow controlled by
XON/XOFF and RTS/CTS.
Synchronous Access Mode (SAM) - Video Conferencing
V.80 synchronous access mode between the modem and the host/DTE is 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.
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