Datenblatt-Suchmaschine für elektronische Bauteile |
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FDC37C665GT Datenblatt(PDF) 6 Page - SMSC Corporation |
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FDC37C665GT Datenblatt(HTML) 6 Page - SMSC Corporation |
6 / 152 page 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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