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TL16PNP200APH bảng dữ liệu(PDF) 8 Page - Texas Instruments |
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TL16PNP200APH bảng dữ liệu(HTML) 8 Page - Texas Instruments |
8 / 10 page TL16PNP200A STANDALONE PLUG-AND-PLAY (PnP) CONTROLLER SLLS274A– APRIL1997 – REVISED MAY 1997 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 default format (continued) The formats for the coded fields are as follows: Table 2. I/O Block Size CODE BLOCK SIZE ADDRESS BITS DECODED 000 1 byte 15-0 001 2 bytes 15-1 010 4 bytes 15-2 011 8 bytes 15-3 100 16 bytes 15-4 101 32 bytes 15-5 110 64 bytes 15-6 Table 3. OEN0 Configuration - Mode 0 CODE LOGICAL DEVICE 000 LD0 001 LD1 010 LD0 or LD1 Table 4. OEN0 and OEN1 Configuration - Mode 1 CODE LOGICAL DEVICE 000 LD0 001 LD1 010 LD2 011 LD3 100 LD4 The IRQ level field is the IRQ level number (for example 0011 for IRQ3, 0100 for IRQ4, etc.), and the DMA channel field is the DMA channel number (for example 000 for DMA channel 0, 001 for DMA channel 1, etc.). The LDn Active bits must be set to 1 when device n is required to be active on power up or after reset, otherwise it is cleared to 0. The mode bit must be 0 for mode 0 operation and 1 for mode 1 operation. The DMA mapping fields tell the TL16PNP200A which ISA DMA channels are connected to the device. For example, in Mode 0 any three ISA DMA channels can be connected to the device. When DMA channels 0, 3, and 5 are connected to CDRQ0/CDACK0, CDRQ1/CDACK1, and CDRQ2/CDACK2, respectively, then DMA 0 mapping field will be 000, DMA 1 mapping field will be 011, and DMA 2 mapping field will be 101. |
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