2
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Serial Ports
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Two Full Function Serial Ports
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High Speed NS16C550 Compatible
UARTs with Send/Receive 16-Byte
FIFOs
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Supports 230k and 460k Baud
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Programmable Baud Rate Generator
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Modem Control Circuitry
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480 Address and 15 IRQ Options
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IrDA 1.0, HP-SIR, ASK IR Support
Multi-Mode Parallel Port with ChiProtect
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Standard Mode IBM PC/XT, PC/AT,
and PS/2 Compatible Bidirectional
Parallel Port
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Enhanced Parallel Port (EPP)
Compatible - EPP 1.7 and EPP 1.9
(IEEE 1284 Compliant)
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IEEE 1284 Compliant Enhanced
Capabilities Port (ECP)
Fast Gate A20 and KRESET Outputs
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ChiProtect Circuitry for Protection
Against Damage Due to Printer Power-
On
480 Address, up to 15 IRQ and 3 DMA
Options
LPC Bus (Pin Reduced ISA) Host Interface
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Multiplexed Command, Address and
Data Bus
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8-Bit I/O Transfers
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8-Bit DMA Transfers
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16-Bit Address Qualification
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Serial IRQ Interface Compatible with
Serialized IRQ Support for PCI
Systems
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Power Management Event (nIO_PME)
Interface Pin
128 Pin QFP Package
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GENERAL DESCRIPTION
The LPC47B34x* is a 3.3V PC99 compliant
Super
I/O
controller.
implements the LPC interface, a pin reduced
ISA interface which provides the same or better
performance as the ISA/X-bus with a substantial
savings in pins used. The part provides 62
GPIO pins and ISA IRQ to serial IRQ
conversion.
The
LPC47B34x
The LPC47B34x incorporates a keyboard
interface, SMSC's true CMOS 765B floppy disk
controller, advanced digital data separator, two
16C550 compatible UARTs, one Multi-Mode
parallel port which includes ChiProtect circuitry
plus EPP and ECP, and Intelligent Power
Management. The true CMOS 765B core
provides 100% compatibility with IBM PC/XT
and PC/AT architectures in addition to providing
data overflow and underflow protection. The
SMSC
advanced
digital
incorporates SMSC's patented data separator
technology, allowing for ease of testing and use.
data
separator
The on-chip UARTs are compatible with the
NS16C550. The parallel port is compatible with
IBM PC/AT architecture, as well as IEEE 1284
EPP and ECP. The LPC47B34x incorporates
sophisticated power control circuitry (PCC). The
PCC supports multiple low power down modes.
The LPC47B34x supports the ISA Plug-and-Play
Standard (Version 1.0a) and provides the
recommended functionality to support Windows
'95/‘98 and PC99. The I/O Address, DMA
Channel and Hardware IRQ of each logical
device
in
the
LPC47B34x
reprogrammed
through
configuration registers. There are 480 I/O
address location options, a Serialized IRQ
interface, and three DMA channels.
may
be
the
internal
Standard Microsystems is a registered trademark and
SMSC
is
a
trademark
of
Corporation. Other product and company names are
trademarks or registered trademarks of their respective
holders.
Standard
Microsystems
*The “x” in the part number is a designator that changes depending upon the particular BIOS used
inside the specific chip.