Texas Instruments PCI445X manual Interrupt Signaling Interface, Miscellaneous Signals

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System Implementation

If the third ZV source is not implemented, ZVPCLK and ZVSTAT are not required. To support ZV audio, an audio codec device is required for L and R sound decoding.

1.3.3Interrupt Signaling Interface

￿Serialized Interrupt Interface

The serialized interrupt (ISA and PCI) interface is a single-line interface, IRQSER. A pullup resistor is required on this terminal. The signal is synchronous to PCLK, so PCLK is a required signal. Please remember that SUSPEND gates PCLK internally. Usually this signal is connected to the south bridge (ex., PIIX4). The IRQSER signal is sharable with other devices.

￿Parallel PCI Interrupt

See Section 1.2.2, PCI Bus Interface.

1.3.4Miscellaneous Signals

1.3.4.1SUSPEND

The SUSPEND signal gates the PRST and G_RST signals from the PCI445X device. SUSPEND also gates PCLK inside the PCI445X device in order to minimize power consumption. Gating PCLK makes the IRQSER state machine stop until SUSPEND is deasserted. Two requirements for implementing suspend mode are that the PCI bus must not be parked on the PCI445X device and IRQSER signaling is not proceeding when SUSPEND is asserted.

1.3.4.2RI_OUT and PME

RI_OUT can be programmed on the RI_OUT/PME or MFUNC7 terminal. PME can be programmed only on the RI_OUT/PME terminal. To support both RI_OUT and PME in a system, the RI_OUT/PME terminal must be programmed as PME. These signals are usually connected to the south bridge (ex., PIIX4) or an embedded controller (EC). Buffers of the RI_OUT/PME type are open-drain; therefore, a pullup resistor is required on this terminal.

1.3.4.3SPKROUT

SPKROUT is a dedicated terminal and it is usually mixed to PC sound, and connected to a sound device.

1.3.4.4Activity LEDs

Activity LEDs can be programmed on MFUNC terminals. These signals are active-high and driven for 64 ms duration.

1.3.4.5Distributed DMA (DDMA)

The PCI445X device supports both PC/PCI (centralized) DMA and a distributed DMA slave engine for 16-bit PC Card DMA support.

PCI445X Device

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Contents Implementation Guide Important Notice About This Manual Read This FirstCsr ±a /user/ti/simuboard/utilities Related Documentation From Texas Instruments Page Contents Viii Figures Tables Topic PCI445X Device±1. Typical System Architecture System Features Selection Optional PCI Signals Socket Power SwitchesPCI and ISA Style Interrupt Distributed DMA DdmaMFUNC7±MFUNC0 Terminal Assignments Socket Activity LEDsMiscellaneous Functions Description Serialized Interrupt ControlPower Savings Mode CardBus Reserved Terminal SignalingAsynchronous CSC Interrupt Generation Memory Burst R/W Operation Control12.9 SMI Socket Power Lock12.11VCC Protection ZV Port Control and Auto Detect FunctionClamping Rails System ImplementationPCI Bus Interface PERR, SERR, and LockINTA, INTB, and Intc Prst PCI reset and Grst Global resetSocket power supply 4 2-Wire I2C Interface for EepromPC Card Interface Damping resistor on Cclk terminalEeprom ±1. Registers and Bits Loadable Through Serial EepromSample PCI445X Eeprom Data File System Implementation Zoomed Video ZV Interface 1 P2C Interface for TPS22X6 Power SwitchMiscellaneous Signals Interrupt Signaling Interface±2. PC Card Interface Pullup Resistor List² ³ Requirement of Pullup/Pulldown Resistors±4. Miscellaneous Terminals Pullup Resistor List ±3. PCI Bus Interface Pullup Resistor ListLPS ±5. Required Pullup/Pulldown ResistorsInitialization Bios ConsiderationsPCI Standard Registers Initialization PCI TI Proprietary Registers Initialization System Sleeping State ConsiderationDocking System Consideration Register save/restoreImportant Information Topic Global Reset Only Bits, PME Context BitsTable A±1.Global Reset Only Cleared Bits Global Reset Only Bits/PME Context BitsTable A±2.PME Context Bits Page PME and RI Behavior PME and RI Behavior Table B±1.CardBus Ctschg and Wake-Up Signals Truth TablePCI445X Buffer Types PCI445X Buffer Types Signal Name Terminal TypeACVS2 BCAD22 GND PHYDATA6 ZVUV4 TSO Buffer Type Description Table C±2. Buffer Type Abbreviations
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