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PC87366 数据表(PDF) 38 Page - National Semiconductor (TI) |
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PC87366 数据表(HTML) 38 Page - National Semiconductor (TI) |
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38 / 240 page  2.0 Device Architecture and Configuration (Continued) 38 www.national.com Table 10. Interrupt Configuration Registers Table 11. DMA Configuration Registers Table 12. Special Logical Device Configuration Registers Index Register Name Description 70h Interrupt Number and Wake-Up on IRQ Enable Indicates selected interrupt number. Bit 4 - Enables wake-up on the IRQ of the logical device. When enabled, IRQ assertion triggers a wake-up event. 0: Disabled (default) 1: Enabled 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 register. 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 Register Name Description 74h DMA Channel Select 0 Indicates selected DMA channel for DMA 0 of the logical device (0 - The first DMA channel in case of using more than one DMA channel). Bits 2-0 select the DMA channel for DMA 0. The valid choices are 0-3, where a value of 0 selects DMA channel 0, 1 selects channel 1, 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 of the logical device (1 - The second DMA channel in case of using more than one DMA channel). Bits 2-0 select the DMA channel for DMA 1. The valid choices are 0-3, where a value of 0 selects DMA channel 0, 1 selects channel 1, etc. A value of 4 indicates that no DMA channel is active. The values 5-7 are reserved. Index Register Name Description F0h-FEh Logical Device Configuration Special (vendor-defined) configuration options. |
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