PC87351 datasheet(27/86 Pages) NSC

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2.0 Device Architecture and Configuration (Continued)

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Table 2-5. PnP I/O Space Conﬁguration Registers

Table 2-6. PnP Interrupt Conﬁguration Registers

Table 2-7. PnP DMA Conﬁguration Registers

Table 2-8. PnP Logical Device Conﬁguration Registers

Index

Name

Description

60h

I/O Port Base

Address Bits (15-8)

Descriptor 0

Indicates selected I/O lower limit address bits 15-8 for I/O descriptor 0

61h

I/O Port Base

Address Bits (7-0)

Descriptor 0

Indicates selected I/O lower limit address bits 7-0 for I/O descriptor 0

62h

I/O Port Base

Address Bits (15-8)

Descriptor 1

Indicates selected I/O lower limit address bits 15-8 for I/O descriptor 1

63h

I/O Port Base

Address Bits (7-0)

Descriptor 1

Indicates selected I/O lower limit address bits 7-0 for I/O descriptor 1

Index

Name

Description

70h

Interrupt Request

Number Select

Indicates selected interrupt number

Bits 3-0 select the interrupt number. A value of 1 selects IRQ1, a value of 2 selects

IRQ2, etc. (up to IRQ15). IRQ0 is not a valid interrupt selection.

71h

Interrupt Request

Type Select

Indicates the type and level of the interrupt request number selected in the previous

Bit 0 - Type of interrupt request selected in previous register

0: Edge

1: Level

Bit 1 - Level of interrupt request selected in previous register

0: Low polarity

1: High polarity

Index

Name

Description

74h

DMA Channel

Select 0

Indicates selected DMA channel for DMA 0

Bits 2-0 select the DMA channel for DMA 0. The valid choices are 1-3, where a

value of 1 selects DMA channel 1, 2 selects DMA channel 2, etc.

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

The values 5-7 are reserved.

75h

DMA Channel

Select 1

Indicates selected DMA channel for DMA 1

Bits 2-0 select the DMA channel for DMA 1. The valid choices are 1-3, where a

value of 1 selects DMA channel 1, 2 selects DMA channel 2, etc.

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

The values 5-7 are reserved.

Index

Name

Description

F0h-FEh

Logical Device

Conﬁguration

Vendor-deﬁned

PC87351 Datasheet(PDF) 27 Page - National Semiconductor (TI)

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