PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 29

• Manufacturer Part Number: PC87307VUL
• Description: PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
• Manufacturer: National Semiconductor

Index
70h
71h
Index
74h
75h
F0h-FEh
Index
Interrupt Request
Interrupt Request
Level Select 0
Type Select 0
DMA Channel
DMA Channel
Name
Select 0
Select 1
Name
Vendor Defined
Logical Device
Configuration
Name
TABLE 2-10. PnP Logical Device Configuration Registers
Read/write value indicating selected interrupt level.
Bits3-0 select the interrupt level used for interrupt 0. A value of 1 selects IRQL 1, a value
of 15 selects IRQL 15. IRQL 0 is not a valid interrupt selection and (represents no
interrupt selection.
Read/write value that indicates the type and level of the interrupt request level selected in
the previous register.
If a card supports only one type of interrupt, this register may be read-only.
Bit 0 - Type of the interrupt request selected in the previous register.
Bit1 - Level of the interrupt request selected in the previous register. (see also “IRQ
Mapping” on page 181).
Read/write value indicating selected DMA channel for DMA 0.
Bits 2-0 select the DMA channel for DMA 0. A value of 0 selects DMA channel 0; a
value of 7 selects DMA channel 7.
Selecting DMA channel 4, the cascade channel, indicates that no DMA channel is
active.
Read/write value indicating selected DMA channel for DMA 1
Bits 2-0 select the DMA channel for DMA 1. A value of 0 selects DMA channel 0; a
value of 7 selects DMA channel 7.
Selecting DMA channel 4, the cascade channel, indicates that no DMA channel is
active.
TABLE 2-8. PnP Interrupt Configuration Registers
0 - Edge
1 - Level
0 - Low polarity (implies open-drain output with strong pull-up for a short time, followed
1 - High polarity (implies push-pull output).
TABLE 2-9. PnP DMA Configuration Registers
by weak pull-up).
Vendor defined.
Configuration
29
Definition
Definition
Definition
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