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VT82C596 Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers |
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VT82C596 Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers |
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9 / 96 page  VT82C596B Revision 0.3 June 17, 1999 -3- Overview 7HFKQRORJLHV ,QF :H &RQQHFW :H &RQQHFW OVERVIEW The VT82C596B south bridge is a high integration, high performance, power-efficient, and high compatibility device that supports PCI / ISA bus bridge functionality to make a complete Microsoft PC98-compliant system. In addition to complete ISA extension bus functionality, the VT82C596B includes standard intelligent peripheral controllers: a) Master mode enhanced IDE controller with dual channel DMA engine and interlaced dual channel commands. Dedicated FIFO coupled with scatter and gather master mode operation allows high performance transfers between PCI and IDE devices. In addition to standard PIO and DMA mode operation, the VT82C596B also supports the UltraDMA-33 standard to allow reliable data transfer rates up to 33MB/sec throughput and the UltraDMA-66 standard for 66MB/sec data transfer. The IDE controller is SFF-8038i v1.0 and Microsoft Windows-95 / 98 / NT compliant. b) Universal Serial Bus controller that is USB v1.1 and Universal HCI v1.1 compliant. The VT82C596B includes the root hub with two function ports with integrated physical layer transceivers. The USB controller allows hot plug and play and isochronous peripherals to be inserted into the system with universal driver support. The controller also implements legacy keyboard and mouse support so that legacy software can run transparently in a non-USB-aware operating system environment. c) Keyboard controller with PS2 mouse support. d) Real Time Clock with 256 byte extended CMOS. In addition to the standard ISA RTC functionality, the integrated RTC also includes the date alarm, century field, and other enhancements for compatibility with the ACPI standard. e) Notebook-class power management functionality compliant with ACPI and legacy APM requirements. Multiple sleep states (power-on suspend, suspend-to-DRAM, and suspend-to-Disk) are supported with hardware automatic wake-up. Additional functionality includes event monitoring, CPU clock throttling and stop (Intel processor protocol), PCI bus clock stop control, modular power, clock and leakage control, hardware-based and software-based event handling, general purpose I/O, chip select and external SMI. f) Full System Management Bus (SMBus) interface. g) Distributed DMA capability for support of ISA legacy DMA over the PCI bus. PC/PCI and Serial IRQ mechanisms are also supported for docking and non-docking applications. h) Plug and Play controller that allows complete steerability of all PCI interrupts to any interrupt channel. Three additional steerable interrupt channels are provided to allow plug and play and reconfigurability of on-board peripherals for Windows 95 compliance. i) Integrated APIC (see the Win98 Hardware Design Guide) The VT82C596B also enhances the functionality of the standard ISA peripherals. The integrated interrupt controller supports both edge and level triggered interrupts channel by channel. The integrated DMA controller supports type F DMA in addition to standard ISA DMA modes. Compliant with the PCI-2.1 specification, the VT82C596B supports delayed transactions so that slower ISA peripherals do not block the traffic of the PCI bus. Special circuitry is built in to allow concurrent operation without causing dead lock even in a PCI-to-PCI bridge environment. The chip also includes eight levels (doublewords) of line buffers from the PCI bus to the ISA bus to further enhance overall system performance. CPU / Cache CA PCI MD MA/Command CD I2C (Module ID) North Bridge 324 BGA VT82C596B System Memory Sideband Signals: Init / CPUreset IRQ / NMI SMI / StopClk FERR / IGNNE USB KBC IDE GPIO, Power Control, Reset ISA RTC Crystal Boot ROM Expansion Cards Figure 1. PC System Configuration Using the VT82C596B |
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