LPC47N237-MD SMSC [SMSC Corporation], LPC47N237-MD Datasheet - Page 71
LPC47N237-MD
Manufacturer Part Number
LPC47N237-MD
Description
3.3V I/O CONTROLLER FOR PORT REPLICATORS AND DOCKING STATIONS
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.LPC47N237-MD.pdf
(138 pages)
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3.3v I/O Controller for Port Replicators and Docking Stations
11.1.7 Reset and Initialization
SMSC DS – LPC47N237
The SER_IRQ bus uses nPCI_RESET as its reset signal. The SER_IRQ pin is tri-stated by all agents while
nPCI_RESET is active. With reset, SER_IRQ Slaves are put into the (continuous) IDLE mode. The Host
Controller is responsible for starting the initial SER_IRQ Cycle to collect system’s IRQ/Data default values.
The system then follows with the Continuous/Quiet mode protocol (Stop Frame pulse width) for
subsequent SER_IRQ Cycles. It is Host Controller’s responsibility to provide the default values to 8259’s
and other system logic before the first SER_IRQ Cycle is performed. For SER_IRQ system suspend,
insertion, or removal application, the Host controller should be programmed into Continuous (IDLE) mode
first. This is to guarantee SER_IRQ bus is in IDLE state before the system configuration changes.
DATASHEET
Page 71
Revision 0.3 (10-26-04)
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