General Description

The LPC47N237 is a 3.3V (5V Tolerant) PC99a/PC2001 compliant Docking I/O controller. The device, which implements the LPC interface, includes I/O functionality. LPC47N237’s LPC interface supports LPC I/O and DMA cycles. There is also a SMBus hosted GPIO Block.

The LPC47N237 provides 4 LPC general purpose pins which offer flexibility to the system designer. The legacy I/O included in the LPC47N237 are: a 16C550A compatible UART; one Multi-Mode parallel port including ChiProtect circuitry plus EPP and ECP. The parallel port is compatible with IBM PC/AT architecture, as well as IEEE 1284 EPP and ECP. The LPC47N237 incorporates sophisticated power control circuitry (PCC) which includes support for PME. The PCC supports multiple low power-down modes. The LPC47N237 is ACPI 1.0b/2.0 compatible.

Product Features

▪ 3.3 Volt Operation (5V Tolerant)

▪ 32 SMBus-Hosted General Purpose Input/Output Pins

   − SMBus Slave Controller Enables Read/Write Access to GPIO Ports

   − SMBus Runs on and GPIO Pins are Driven by Suspend Supply (VTR)

   − SMBus Interrupt Pin

   − SMBus Isolation Circuitry

▪ PC99a/PC2001 Compliant

▪ ACPI 1.0/2.0 Compliant

▪ Power Management Interface

▪ LPC Interface

   − Multiplexed Command, Address and Data Bus

   − Serial IRQ Interface Compatible with Serialized IRQ Support for PCI Systems

   − nIO_PME pin for UART Ring Indicate

   − PCI Clock Run Support

▪ 4 LPC-Hosted General Purpose Input/Output Pins

▪ Serial Port

   − Full Function Serial Port

   − High Speed 16C550A Compatible UART with 16-Byte Send/Receive FIFOs

   − Programmable Baud Rate Generator supports 230k and 460k Baud

   − Modem Control Circuitry

   − 480 Address and 15 IRQ Options

   − Ring Indicator Wakeup Event

▪ Multi-Mode™ Parallel Port with ChiProtect™

   − Standard Mode IBM PC/XT®, PC/AT®, and PS/2™ Compatible Bidirectional Parallel Port

   − Enhanced Parallel Port (EPP) Compatible

   - EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant)

   − IEEE 1284 Compliant Enhanced Capabilities Port (ECP)

   − ChiProtect Circuitry for Protection

   − 480 Address, Up to 15 IRQ and Three DMA Options

▪ XNOR-Chain

▪ 100 pin TQFP lead-free RoHS compliant package