PC87383  Product Folder

The PC87383, a member of the National Semiconductor LPC SuperI/O family, is targeted for a wide range of portable applications. The PC87383 is PC2001 and ACPI compliant, and features Fast Infrared port (FIR, IrDA 1.1 compliant), Serial Port, Parallel Port and General-Purpose Input/Output (GPIO) support for a total of 21 ports.

Outstanding Features

• LPC bus interface, based on IntelÆs LPC Interface Specification Revision 1.1, August 2002 (supports CLKRUN and LPCPD signals)
• Fast Infrared port
• PC2001 and ACPI Revision 2.0 compliant
• Serial IRQ support (15 options)
• Protection features, including GPIO lock and pin configuration lock
• 21 GPIO ports, including 14 with ôassert IRQö capability
• XOR Tree and TRI-STATE™ device pins (or ICT) testability modes.
• 5V tolerant and back-drive protected pins (except LPC bus pins)
• 64-pin TQFP package

• LPC System Interface
  • Synchronous cycles, up to 33 MHz bus clock
  • 8-bit I/O cycles
  • Up to four 8-bit DMA channels
  • LPCPD and CLKRUN support
  • Implements PCI mobile design guide recommendation (PCI Mobile Design Guide 1.1, Dec. 18, 1998)
• PC2001 and ACPI Compliant
  • PnP Configuration Register structure
  • Flexible resource allocation for all logical devices
    • Relocatable base address
    • ❏ 15 IRQ routing options
    • Three optional 8-bit DMA channels (where applicable) selected from four possible DMA channels
• Clock Sources
  • 14.318 MHz or 48 MHz clock input
  • LPC clock, up to 33 MHz
• Power Supply
  • 3.3V supply operation
  • All pins are 5V tolerant, except LPC bus pins
  • All pins are back-drive protected, except LPC bus pins
• 21 General-Purpose I/O (GPIO) Ports
  • 14 support assert IRQ
  • Programmable drive type for each output pin (opendrain, push-pull or output disable)
  • Programmable option for internal pull-up resistor on each input pin
  • Output lock option
  • Programmable option for input debounce mechanism
• Serial Port (SP1)
  • Software compatible with the 16550A and the 16450
  • Shadow register support for write-only bit monitoring
  • UART data rates up to 1.5 Mbaud
• IEEE 1284-compliant Parallel Port
  • ECP, with Level 2 (14 mA sink and source output buffers)
  • Software or hardware control
  • Enhanced Parallel Port (EPP) compatible with EPP 1.7 and EPP 1.9
  • Supports EPP as mode 4 of the Extended Control Register (ECR)
  • Selection of internal pull-up or pull-down resistor for Paper End (PE) pin
  • Supports a demand DMA mode mechanism and a DMA fairness mechanism for improved bus utilization
  • Protection circuit that prevents damage to the parallel port when a printer connected to it is powered up or is operated at high voltages (in both cases, even if the PC87383 is in power-down state)
• Fast Infrared Port (FIR)
  • Software compatible with the 16550A and the 16450
  • Shadow register support for write-only bit monitoring
  • FIR IrDA 1.1 compliant
  • HP-SIR
  • ASK-IR option of SHARP-IR
  • DASK-IR option of SHARP-IR
  • Consumer Remote Control supports RC-5, RC-6, NEC, RCA and RECS 80
  • DMA support: 1 or 2 channels
• Strap Configuration
  • Base Address (BADDR) strap to determine the base address of the Index-Data register pair
  • Strap Inputs to select testability mode
• Testability
  • XOR Tree
  • TRI-STATE device pins