DEC GTX5166M Service Quick Reference Manual page 16

System Command Processor
The System Command Processor is implemented using the
Hitachi H8 IKAP II processor. This processor provides the
following functions:
•
Simultaneous support of two external PS/2 ports and
the internal Touch pad.
•
2
I C bus master for communication to:
−
Status LCD
−
EEPROM
−
Docking interface components
•
Hot Key interface.
•
Secure password protection.
•
System power plane control and power sequencing.
•
Battery management interface for charging and the
Smart battery information.
•
Status LCD and device monitoring interface.
•
Active thermal interface for CPU thermal management.
•
Internal keyboard scanning.
Super I/O
I/O support is provided by the National Semiconductor PC87338
chip. This chip supports the following functions:
•
Floppy disk controller with Japanese floppy support.
•
IEEE 1284 Parallel port.
•
Serial infrared support – IrDa 1.1 (115Kbps and 4Mbps).
•
16550 UARTs.
•
Full Plug-and-Play support.
Overview
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