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FDC37C78 bảng dữ liệu(PDF) 10 Page - Microchip Technology

tên linh kiện FDC37C78
Giải thích chi tiết về linh kiện  Floppy Disk Controller
PDF  82 Pages
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

FDC37C78 bảng dữ liệu(HTML) 10 Page - Microchip Technology

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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.



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