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FDC37C78-HT Datasheet(PDF) 10 Page - Microchip Technology |
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FDC37C78-HT Datasheet(HTML) 10 Page - Microchip Technology |
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10 / 82 page  10 FUNCTIONAL DESCRIPTION FDC37C78 REGISTERS The address map, shown below in Table 1, shows the addresses of the different blocks of the FDC37C78 immediately after power up. Some addresses are used to access more than one register. HOST PROCESSOR INTERFACE The host processor communicates with the FDC37C78 through a series of read/write registers. The port addresses for these registers are shown in Table 1. Register access is accomplished through programmed I/O or DMA transfers. All registers are 8 bits wide. Table 1 - FDC37C78 Block Addresses ADDRESS BLOCK NAME NOTES +0, +1 Configuration Write only; Note 1, 2 Base +0,1 Floppy Disk Read only; Disabled at power up; Note 2 Base +[2:5, 7] Floppy Disk Disabled at power up; Note 2 Note 1: Configuration registers can only be modified in configuration mode, refer to the configuration register description for more information. Access to status registers A and B of the floppy disk is disabled in configuration mode. Note 2: The fdc must be enabled in the configuration registers before accessing the registers. |
Similar Part No. - FDC37C78-HT |
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Similar Description - FDC37C78-HT |
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