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PCI1221 Datasheet(PDF) 56 Page - Texas Instruments |
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PCI1221 Datasheet(HTML) 56 Page - Texas Instruments |
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56 / 123 page  PCI1221 GHK/PDV PC CARD CONTROLLERS SCPS042 – JULY 1998 56 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 interrupt pin register Bit 7 6 5 4 3 2 1 0 Name Interrupt pin Type R R R R R R R R Default 0 0 0 0 0 0 1 1 Register: Interrupt pin Type: Read only Offset: 3Dh Default: Depends on the interrupt signaling mode (sample shown is 03h) Description The value read from the interrupt pin register is function dependent and depends on the interrupt signaling mode, selected through the device control register and the state of the INTRTIE bit in the system control register. When the INTRTIE bit is set, this register reads 0x01 (INTA) for both functions. See Table 19 for the complete description of the register contents. Table 19. Interrupt Pin Register Cross Reference INTERRUPT SIGNALING MODE INTRTIE BIT INTPIN FUNCTION 0 INTPIN FUNCTION 1 Parallel PCI interrupts only 0 0x01 (INTA) 0x02 (INTB) Parallel IRQ and parallel PCI interrupts 0 0x01 (INTA) 0x02 (INTB) IRQ serialized (IRQSER) and parallel PCI interrupts 0 0x01 (INTA) 0x02 (INTB) IRQ and PCI serialized (IRQSER) interrupts (default) 0 0x01 (INTA) 0x02 (INTB) Parallel PCI interrupts only 1 0x01 (INTA) 0x01 (INTA) Parallel IRQ and parallel PCI interrupts 1 0x01 (INTA) 0x01 (INTA) IRQ serialized (IRQSER) and parallel PCI interrupts† 1 0x01 (INTA) 0x01 (INTA) IRQ and PCI serialized (IRQSER) interrupts† 1 0x01 (INTA) 0x01 (INTA) † When configuring the PCI1221 functions to share PCI interrupts, multifunction terminal MFUNC3 must be configured as IRQSER prior to setting the INTRTIE bit. |
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