I/O Controller Floppy Disc Controller 100-Pin TQFP

The Microchip LPC47N267 is a 3.3V PC 99 and ACPI 1.0 compliant Super I/O Controller. The LPC47N267 implements an LPC interface, a pin reduced ISA interface, for supported I/O and DMA cycles. In addition, this part includes an XBus interface that may be accessed through the LPC interface for supported I/O cycles (memory cycles are not supported by this device). The X-Bus interface supports as many as four external components and it offers three different modes of operation for interfacing with these components. The X-Bus interface has an added “Write Protect” feature that ensures that the Base Address and disable bit for each component can only be set by the BIOS to prevent corruption by any virus software. This part also includes 29 GPIO pins. The LPC47N267 incorporates Microchip’s true CMOS 765B floppy disk controller, advanced digital data separator, 16- byte data FIFO, two 16C550 compatible UARTs, one Multi-Mode parallel port with ChiProtect circuitry plus EPP and ECP support and one floppy direct drive support. The LPC47N267 does not require any external filter components, is easy to use and offers lower system cost and reduced board area. The LPC47N267 is software and register compatible with Microchip’s proprietary 82077AA core. The true CMOS 765B core provides 100% compatibility with IBM PC/XT and PC/AT architectures and provides data overflow and underflow protection. The Microchip advanced digital data separator incorporates Microchip’s patented data separator technology allowing for ease of testing and use. The LPC47N267 supports both 1Mbps and 2Mbps data rates and vertical recording operation at 1Mbps Data Rate. The LPC47N267 also features a full 16-bit internally decoded address bus, a Serial IRQ interface with PCI nCLKRUN support, relocatable configuration ports and three DMA channel options.

• 3.3 Volt Operation (5V tolerant)
• Programmable Wakeup Event Interface (IO_PME# Pin)
• SMI Support (IO_SMI# Pin)
• GPIOs (14)
• Two IRQ Input Pins
• XNOR Chain
• PC99a, PC2001
• ACPI 2.0 Compliant
• 64-pin STQFP RoHS Compliant Package
• Intelligent Auto Power Management
• Serial Ports - One Full Function Serial Port - High Speed 16C550A Compatible UART with Send/Receive 16-Byte FIFO - Supports 230k and 460k Baud - Programmable Baud Rate Generator - Modem Control Circuitry
• Infrared Communications Controller - IrDA v1.2 (4Mbps), HPSIR, ASKIR, Consumer IR Support - 1 IR Port - 96 Base I/O Address, 15 IRQ Options and 3 DMA Options
• Multi-Mode Parallel Port with ChiProtectTM - 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 Against Damage Due to Printer Power-On - 192 Base I/O Address, 15 IRQ and 3 DMA Options
• LPC Bus Host Interface - Supports LPC Bus frequencies of 19.2 MHz to 33 MHz - Multiplexed Command, Address and Data Bus - 8-Bit I/O Transfers - 8-Bit DMA Transfers - 16-Bit Address Qualification