VL82C114 Combination I/O

The VL82C114 Combination I/O chip, when used with VLSI System Controller chips, allows designers to implement a very cost-effective minimum chip count motherboard. This chip combines a keyboard controller and a real-time clock with the address registers/ latches and buffers which are normally required in ISA bus compatible systems. The VL82C114 features an AT-compatible keyboard controller with integrated PS/2 mouse support and a 146818A-compatible real-time clock. The VL82C114 also has 114 additional bytes of battery-backed CMOS RAM for use in extended system setup. In addition, the VL82C114 provides support for processors with write-back cache controllers.

Features:

• Integrated peripheral controller that interfaces with several of VLSI's Single Chip System/ISA Bus controllers
  • VL82C480
  • VL82C481
  • VL82C486
  • VL82C310
  • VL82C311
  • VL82C311L
• Backwards compatible with the industry standard VL82C113A
• 146818A-Compatible real-time clock
• 114 additional bytes of battery-backed CMOS RAM
• AT-compatible keyboard controller with integrated PS/2 mouse support
• Processor to ISA bus address latches and buffers, which support 16- and 32-bit processors.
• Supports processors with write-back cache controllers
• Real-time clock can be relocated via SA[15:0] address registers
• Includes ISA bus refresh counters for decoupled refresh
• 1.0-micron CMOS
• 100-lead MQFP (Metric Quad Flat Pack)