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SIO1007 Folha de dados(PDF) 46 Page - Microchip Technology

Nome de Peças SIO1007
Descrição Electrónicos  LPC Super I/O LPC IrDA Hot Docking Chip with UART
PDF  108 Pages
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Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

SIO1007 Folha de dados(HTML) 46 Page - Microchip Technology

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SIO1007
DS00002020A-page 46
 2005 - 2015 Microchip Technology Inc.
Note 1: The signal “ANY IRQ CHANGE/DRQ ASSERTION” is the same as “CHANGE/ASSERTION” in Table 13-1.
2: The SIO1007 continually monitors the state of nCLKRUN to maintain the PCI Clock until an active “ANY IRQ
CHANGE/DRQ ASSERTION” condition has been transferred to the host in a SER_IRQ/DMA cycle. For
example, if “ANY IRQ CHANGE/DRQ ASSERTION” is asserted before nCLKRUN is de-asserted (not
shown in Figure 13-2), the SIO1007 must assert nCLKRUN as needed until the SER_IRQ/DMA cycle has
completed.
FIGURE 13-1:
NCLKRUN SYSTEM IMPLEMENTATION EXAMPLE
FIGURE 13-2:
CLOCK START ILLUSTRATION
PCI CLOCK
GENERATOR
(Central Resource)
MASTER
TARGET
SIO
nCLKRUN
PCI_CLK
PCI_CLK
CLKRUN#
SIRQ_CLKRUN_EN
ANY IRQ CHANGE/
DRQ ASSERTION
1,2
CLKRUN#
DRIVEN BY
SIO
SIO
STOPS
DRIVING
CLKRUN#
2 CLKS MIN.



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