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FDC37C665GT Datenblatt(PDF) 6 Page - SMSC Corporation

Teilenummer FDC37C665GT
Bauteilbeschribung  High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers
Download  152 Pages
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Hersteller  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

FDC37C665GT Datenblatt(HTML) 6 Page - SMSC Corporation

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6
DESCRIPTION OF PIN FUNCTIONS
PIN NO.
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
38
Serial Port
Interrupt
Request
Primary Serial
Port Interrupt
IRQ4
PSPIRQ
O24
O24
FDC37C665GT (Motherboard application):
IRQ4 is the interrupt from the Primary Serial
Port (PSP) or Secondary Serial Port (SSP)
when the PSP or SSP have their address
programmed
as
COM1
or
COM3
(as
defined in the Configuration Registers). The
appropriate interrupt from the Serial Port is
enabled/disabled via the Interrupt Enable
Register (IER).
The interrupt is reset
inactive after interrupt service. It is disabled
through IER or hardware reset.
FDC37C666GT
(Adapter
application):
PSPIRQ is a source of PSP interrupt.
Externally, it should be connected to either
IRQ3 or IRQ4 on PC/AT via jumpers.
37
Serial Port
Interrupt
Request
Secondary Serial
Port Interrupt
IRQ3
SSPIRQ
O24
O24
FDC37C665GT (Motherboard application):
IRQ3 is the interrupt from the Primary Serial
Port (PSP) or secondary Serial Port (SSP)
when the PSP or SSP have their address
programmed
as
COM2
or
COM4
(as
defined in the Configuration Registers). The
appropriate interrupt from the Serial Port is
enabled/disabled via the Interrupt Enable
Register (IER).
The interrupt is reset
inactive after interrupt service. It is disabled
through IER or hardware reset.
FDC37C666GT
(Adapter
application):
SSPIRQ is a source of SSP interrupt.
Externally, it should be connected to either
IRQ3 or IRQ4 on PC/AT via jumpers.
40
Floppy
Controller
Interrupt
Request
FINTR
O24
This
interrupt
from
the
Floppy
Disk
Controller is enabled/disabled via bit 3 of the
Digital Output Register (DOR).


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