LPC47N217-JN

Application Specific Microcontrollers Overview

The SMSC LPC47N217-JN is a Super I/O controller designed for PC99, PC2001, and ACPI 2.0 compliant systems. It operates at 3.3V with 5V-tolerant inputs and utilizes the LPC interface to reduce pin count while maintaining ISA/X-bus performance. The device integrates a 16C550A-compatible UART with 16-byte FIFOs, an infrared communications controller supporting IrDA v1.2, and a multi-mode parallel port with EPP/ECP support. Key electrical parameters include 14 GPIO pins, two IRQ inputs, three DMA channel options, and up to 15 IRQ routing options.

Application Specific Microcontrollers Feature Summary

• LPC Interface: Pin-reduced ISA interface compatible with PC99/PC2001 standards.
• Serial Ports: High-speed 16C550A UART with 16-byte send/receive FIFOs and programmable baud rate generator.
• Parallel Port: Multi-mode support including Standard, EPP (1.7/1.9), and ECP with ChiProtect circuitry.
• Infrared Controller: Supports IrDA v1.2 (4Mbps), HPSIR, ASKIR, and Consumer IR modes.

Application Specific Microcontrollers Applications

• Desktop and notebook computer system boards requiring Super I/O functionality.
• Systems needing integrated serial and parallel port connectivity with low pin-count interfaces.
• Hardware monitoring and power management implementations utilizing ACPI compliance.

Application Specific Microcontrollers Procurement Notes

Verify package type and lead-free status against specific manufacturing lot requirements. Confirm voltage tolerance specifications match target system bus levels. Ensure firmware compatibility with existing BIOS configurations for LPC address decoding and interrupt routing.

Application Specific Microcontrollers Selection Notes

Select this component when a reduced pin-count LPC interface is required instead of legacy ISA or X-bus. Choose based on the need for integrated IrDA support and ChiProtect-enabled parallel ports. Verify that the 14 available GPIOs and 16C550A UART meet the specific peripheral count requirements of the design.

Application Specific Microcontrollers Part Context

This part belongs to the SMSC LPC47N series of Super I/O controllers. It serves as a bridge between the LPC bus and legacy I/O peripherals, replacing separate UART and parallel port chips in modern PC architectures. It is functionally distinct from NXP LPC microcontrollers despite the naming similarity.

Application Specific Microcontrollers Replacement Considerations

Check for direct pin-to-pin replacements within the SMSC/LPC47N family such as the LPC47N217 without suffix variations. Verify if newer revisions maintain identical register maps and timing characteristics for BIOS compatibility.