4-16
Theory of Operation
♦
Extended Capabilities Port (ECP) compatible, including level 2 support
♦
Bidirectional under either software or hardware control
♦
Compatible with ISA, and EISA, architectures
♦
Ability to multiplex FDC signals on parallel port pins allows use of an external
Floppy Disk Drive (FDD)
♦
Includes protection circuit to prevent damage to the parallel port when a
connected printer is powered up or is operated at a higher voltage
♦
UARTs
♦
Software compatible with the PC16550A and PC16450
♦
MIDI baud rate support
♦
Infrared support on UART2 (IrDA 1.0 SIR, IrDA 1.1 MIR and FIR, and Sharp SIR)
♦
Address Decoder
♦
6 bit or 10 bit decoding
♦
External Chip Select capability when 10 bit decoding
♦
Full relocation capability (no limitation)
♦
Enhanced Power Management
♦
Special configuration registers for power-down
♦
Enhanced programmable power-down FDC command
♦
Auto power-down and wake-up modes
♦
2 special pins for power management
♦
Typical current consumption during power-down is less than 10
µ
A
♦
Reduced pin leakage current
♦
Voltage support
♦
3.3/5V operation
♦
General Purpose Pins
♦
1 pin, for 2 separate programmable chip select decoders, can be programmed
for game port control
♦
Plug and Play Compatible
Содержание Extensa 900 Series
Страница 1: ...Maintenance Manual ExtensaTM 900 Series Notebook Computers 9813715 0001 December 1996 ...
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Страница 171: ...MPB Schematic Diagrams B 3 Figure B 1 MPB CPU Board Logic Diagrams Sheet 2 of 3 ...
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