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82379AB

Intel Corporation
Part Number 82379AB
Manufacturer Intel Corporation
Description SYSTEM I/O APIC
Published Mar 22, 2005
Detailed Description E 82378ZB SYSTEM I/O (SIO) AND 82379AB SYSTEM I/O APIC (SIO.A) Four Dedicated PCI Interrupts  Level Sensitive  Mapped...
Datasheet PDF File 82379AB PDF File

82379AB
82379AB


Overview
E 82378ZB SYSTEM I/O (SIO) AND 82379AB SYSTEM I/O APIC (SIO.
A) Four Dedicated PCI Interrupts  Level Sensitive  Mapped to Any Unused Interrupt Provides the Bridge Between the PCI Bus and ISA Bus 100% PCI and ISA Compatible  PCI and ISA Master/Slave Interface  Directly Drives 10 PCI Loads and 6 ISA Slots  PCI at 25 MHz and 33 MHz  ISA from 6 MHz to 8.
33 MHz Enhanced DMA Functions  Scatter/Gather (S/G) (82378ZB)  Fast DMA Type A, B and F (82378ZB)  Compatible DMA Transfers  32-bit Addressability(82378ZB)  27-bit Addressability(82379AB)  Seven Independently Programmable Channels  Functionality of Two 82C37A DMA Controllers Data Buffers to Improve Performance  8-Byte DMA/ISA Master Line Buffer  32-bit Posted Memory Write Buffer to ISA Integrated 16-bit BIOS Timer Non-Maskable Interrupts (NMI)  PCI System Errors  ISA Parity Errors Arbitration for ISA Devices  ISA Masters  DMA and Refresh Arbitration for PCI Devices  Six PCI Masters Supported  Fixed, Rotating, or a Combination Utility Bus (X-Bus) Peripheral Support  Provides Chip Select Decode  Controls Lower X-Bus Data Byte Transceiver Functionality of One 82C54 Timer  System Timer  Refresh Request  Speaker Tone Output Functionality of Two 82C59 Interrupt Controllers  14 Interrupts Supported  Edge/Level Selectable Interrupts I/O APIC (Advanced Programmable Interrupt Controller (82379AB)  Support for Multi-Processor Systems System Power Management (Intel SMM Support)  Programmable System Management Interrupt (SMI) Hardware Events, Software Events, EXTSMI#  Programmable CPU Clock Control (STPCLK#)  Fast-On/Off Mode 208-Pin QFP Package The 82378ZB System I/O (SIO) and 82379AB System I/O APIC (SIO.
A) components are PCI-to-ISA Bus Bridge devices.
These devices integrate many of the common I/O functions found in today's ISA-based PC systemsa seven channel DMA controller, two 82C59 interrupt controllers, an 8254 timer/counter, a BIOS timer, Intel SMM power management support, and logic fo...


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