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