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7733 bảng dữ liệu(PDF) 330 Page - Renesas Technology Corp

tên linh kiện 7733
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 bảng dữ liệu(HTML) 330 Page - Renesas Technology Corp

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CONNECTING EXTERNAL DEVICES
7733 Group User’s Manual
12–5
: External area
00000016
Internal RAM
area
SFR area
Memory expansion mode
02000016
FFFFFF16
Internal RAM
area
SFR area
Microprocessor mode
00100016
00000016
FFFFFF16
00100016
00008016
Internal ROM
area (Note)
00008016
Note: This is applied when the memory allocation selection bits (bits 2 to 0 at address 63 16) = “0002.”
For details, refer to section “2.4 Memory allocation.”
12.1.1 External bus (A0 to A7, A8/D8 to A15/D15, and A16/D0 to A23/D7)
The address is output from pins A0 to A23 and specify the external area. Figure 12.1.2 shows the external
area. Pins A8 to A23 of the external address bus and pins D0 to D15 of the external data bus share the
same pins. When pin BYTE’s level, which is described later, is “L,” in other words, when the external data
bus is 16 bits wide, pins A8/D8 to A15/D15 and A16/D0 to A23/D7 perform address output and data input/
output with the time-sharing method. When pin BYTE’s level is “H,” in other words, when the external data
bus is 8 bits wide, pins A16/D0 to A23/D7 perform address output and data input/output with the time-sharing
method and pins A8 to A15 output the address.
Fig. 12.1.2 External area
12.1 Signals required for accessing external devices



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