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