PC87382 datasheet(21/72 Pages) NSC

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3.0 Device Architecture and Configuration (Continued)

Revision 1.2

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Table 11. Interrupt Conﬁguration Registers

Index

Description

70h

Interrupt Number Indicates selected interrupt number.

Bits 7-4: Reserved.

Bits 3-0: These bits select the interrupt number. A value of 1 selects IRQ1. A value

of 15 selects IRQ15. IRQ0 is not a valid interrupt selection and

represents no interrupt selection.

Note: Avoid selecting the same interrupt number (except 0) for different logical

devices, as it causes the PC87382 to behave unpredictably.

71h

Interrupt Request

Type Select

Indicates the type and polarity of the interrupt request number selected in the

previous register. If a logical device supports only one type of interrupt, the

corresponding bit is read only.

Bits 7-2: Reserved.

Bit 1:

Polarity of interrupt request selected in previous register.

0: Low polarity.

1: High polarity.

Bit 0:

Type of interrupt request selected in previous register.

0: Edge.

1: Level.

Table 12. DMA Conﬁguration Registers

Index

Description

74h

DMA Channel

Select 0

Indicates selected DMA channel for DMA 0 of the logical device (0 is the ﬁrst DMA

channel if more than one DMA channel is used).

Bits 7-3: Reserved.

Bits 2-0: These select the DMA channel for DMA 0, where:

- A value of 0, 1, 2, or 3 selects DMA channel 0, 1, 2, or 3, respectively.

- A value of 4 indicates that no DMA channel is active.

- The values 5-7 are reserved.

Note: Avoid selecting the same DMA channel (except 4) for different logical

devices, as it causes the PC87382 to behave unpredictably.

75h

DMA Channel

Select 1

Indicates selected DMA channel for DMA 1 of the logical device (1 is the second

DMA channel if more than one DMA channel is used).

Bits 7-3: Reserved.

Bits 2-0: These select the DMA channel for DMA 1, where:

- A value of 0, 1, 2, or 3 selects DMA channel 0, 1, 2, or 3, respectively.

- A value of 4 indicates that no DMA channel is active.

- The values 5

−7 are reserved.

Note: Avoid selecting the same DMA channel (except 4) for different logical

devices, as it causes the PC87382 to behave unpredictably.

Table 13. Special Logical Device Conﬁguration Registers

Index

Description

F0h-FFh

Logical Device

Conﬁguration

Special (vendor-deﬁned) conﬁguration options.

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