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PC87310 bảng dữ liệu(PDF) 40 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện PC87310
Giải thích chi tiết về linh kiện  PC87310 (SuperI/OTM) Dual UART with Floppy Disk Controller and Parallel Port
PDF  52 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87310 bảng dữ liệu(HTML) 40 Page - National Semiconductor (TI)

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40 Functional Description (Continued)
47 GAME PORT
471 PC87310 Interface to the AT Game Port
To interface with the game port all that is required is the
logic shown in
Figure 8 and the qualification of the read and
write signals Since the PC87310 provides the game port
chip select (GPEN pin 18) the game read and game write
signals can be easily qualified by gating GPEN with IOR and
IOW A typical game port circuit is shown below (The game
port is implemented by using a 74LS244 buffer NE558
Quad Timer and some resistors and capacitors)
472 PC87310 Interface to the XT Game Port
This interface is essentially the same as for the AT except
that the game port read and write signals are qualified on
the PC87310 These qualified read and write signals are
provided from the PC87310 via the GRD and GWR signals
directly This eliminates the need for 2 OR gates in the ex-
ternal game port logic
TLC10591 – 19
FIGURE 8 AT Game Port
40



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