SIO1007 datasheet(41/108 Pages) MICROCHIP

Nome de Peças	SIO1007

Descrição Electrónicos	LPC Super I/O LPC IrDA Hot Docking Chip with UART

PDF	108 Pages

Scroll/Zoom	100%

Fabricante Electrônico	MICROCHIP [Microchip Technology]

Página de início	http://www.microchip.com

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41 / 108 page

 2005 - 2015 Microchip Technology Inc.

DS00002020A-page 41

SIO1007

12.0

SERIAL IRQ

The SIO1007 supports the serial interrupt to transmit interrupt information to the host system. The serial interrupt

scheme adheres to the Serial IRQ Specification for PCI Systems, Version 6.0. The PCI_CLK, SER_IRQ and nCLKRUN

pins are used for this interface. The Serial IRQ/CLKRUN Enable bit D7 in CR29 activates the serial interrupt interface.

12.1

Timing Diagrams for SER_IRQ Cycle

Start Frame timing with source sampled a low pulse on IRQ1

Stop Frame Timing with Host using 17 SER_IRQ sampling period

Note:

H=Host Control; R=Recovery; T=Turn-Around; SL=Slave Control; S=Sample

Start Frame pulse can be 4-8 clocks wide depending on the location of the device in the PCI bridge hierarchy in

a synchronous bridge design.

Note:

H=Host Control; R=Recovery; T=Turn-Around; S=Sample; I=Idle

Stop pulse is 2 clocks wide for Quiet mode, 3 clocks wide for Continuous mode.

There may be none, one or more Idle states during the Stop Frame.

The next SER_IRQ cycle’s Start Frame pulse may or may not start immediately after the turn-around clock of

the Stop Frame.

SIO1007 Folha de dados(PDF) 41 Page - Microchip Technology