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4-22 Theory of Operation
A simplified block diagram of the Super I/O controller is provided in Figure 4-13.
Configuration
Registers
UART
(16550 or 16450)
UART
+ IrDA/HP & Sharp IR
(16550 or 16450)
General
Purpose
Registers
Power
Down Logic
IEEEE1284
Parallel Port
Hifh Current Driver
Floppy Disk
Controller with
Digital Data
Separator
(Enhabced 8477)
I/O Ports Control
Interrupt Data Handshake
Floppy
Drive
Interface
OSC
Interrupt
and
DMA
Floppy
Drive
Interface
Interrupt
IR
Interface
Serial
Interface
Interrupt
Serial
Interface
Config.
Inputs
Figure 4-13 NS87336VJG Chip Simplified Block Diagram