
Datasheet Addendum
iii
Timing Specification — 82371FB (PIIX)
Contents
1.0
Electrical Characteristics
........................................................................................1
1.1
Absolute Maximum Ratings...................................................................................1
1.2
Thermal Characteristics ........................................................................................1
1.3
DC Characteristics ................................................................................................2
1.4
AC Characteristics.................................................................................................3
1.5
Clock, Reset, ISA Bus, X-Bus, and Host Timing Diagrams.................................16
1.6
PCI Timing Diagrams..........................................................................................29
1.7
IDE Timing Diagrams..........................................................................................30
Timing Relationship Diagrams
...........................................................................31
2.1
PCI to IDE AT Compatible Transaction Timing...................................................31
2.0
Figures
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Test Load ............................................................................................................16
Clock Timing........................................................................................................16
Reset Inactive After PWROK ..............................................................................16
Reset Active Pulse Width....................................................................................16
SMI#, EXTSMI#, and STPCLK# Timing..............................................................17
Input to PCICLK Setup/Hold Times.....................................................................17
HCLKIN to Output Valid Delay ............................................................................17
8-Bit ISA Memory Slave Timing (PIIX as Master) ...............................................18
16-Bit ISA Memory Slave Timing (PIIX as Master) .............................................19
8-Bit ISA I/O Slave Timing (PIIX as Master)........................................................20
16-Bit I/O Slave Timing (PIIX as Master) ............................................................20
ISA Master Accessing PCI Memory Timing ........................................................21
ISA Master Accessing PIIX Register Timing .......................................................21
NMI Timing..........................................................................................................21
Interrupt Timing ...................................................................................................22
ISA Master Miscellaneous Timing.......................................................................22
ISA Master Data Swap Timing ............................................................................23
DMA Compatible Timing (Memory Read) ...........................................................24
DMA Compatible Timing (Memory Write)............................................................25
DMA Compatible Timing (Data Swap) ................................................................25
DMA Type F Timing ............................................................................................26
PIIX-Initiated Refresh Timing ..............................................................................26
ISA Master-Initiated Refresh Timing ...................................................................27
PIIX and ISA Master Access to X-Bus Timing.....................................................27
DMA Access to X-Bus Timing .............................................................................28
Coprocessor Error and Mouse Support Timing...................................................28
Real Time Clock Timing (RTCALE Generation)..................................................28
Speaker Timing ...................................................................................................28
Propagation Delay...............................................................................................29
Valid Delay From Rising Clock Edge ..................................................................29
Setup and Hold Times.........................................................................................29