RH56D-PCI Modem Designer’s Guide

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Conexant Proprietary Information

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