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SMSC I/O controller targets notebook port replicators, docks

Posted: 06 May 2002 ?? ?Print Version ?Bookmark and Share

Keywords:lpc47n237? lpc portswitch? chiprotect? i/o controller? input output controller?

Standard Microsystems Corp. has announced the shipment of the LPC47N237 I/O Controller targeted for notebook PC port replicators and docks.

The controller is also a companion product for the company's notebook PC keyboard and system controllers that feature LPC PortSwitch interface.

The LPC PortSwitch interface is a hot-switchable external LPC interface that enables the design of cost-effective, full-featured port replication and docking solutions.

"By combining the LPC47N237 in a port replicator or dock with SMSC's LPC PortSwitch interface, the mobile PC system designer can reduce costs while retaining legacy functionality," stated Robert Hollingsworth, SMSC's SVP for Advanced I/O Products. "The LPC PortSwitch interface simplifies routing in each device and allows the use of a lower pin-count port connector."

Available in a 100-pin TQFP housing, the LPC47N237 is a 3.3V device that implements one multi-mode parallel port with the company's ChiProtect circuitry, one 16C550 compatible serial port, and four GPIOs, across an LPC interface. An independent, standby-powered I2C/SMBus block provides 32 additional GPIOs.

The controller also allows the I/O address, DMA channel, and hardware IRQ of each logical device to be reprogrammed through the internal configuration registers. There are up to 480 (960 for Parallel Port) I/O address location options, a serialized IRQ interface, and three DMA channels.

Other features include PCI clock run support and power control circuitry that supports PME and multiple power-down modes.

The LPC47N237 is ACPI 1.0b/2.0 compatible and is quoted at $6.75 in production quantities.

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