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6V7 bảng dữ liệu(PDF) 77 Page - Renesas Technology Corp

tên linh kiện 6V7
Giải thích chi tiết về linh kiện  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
PDF  298 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

6V7 bảng dữ liệu(HTML) 77 Page - Renesas Technology Corp

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Rev.1.00
May 18, 2004
page 77 of 296
M306V7MG/MH/MJ/MJA-XXXFP, M306V7FG/FH/FJ/FJAFP
Single-chip mode
Memory expansion mode
Transfer unit
Bus width
Access address
Microprocessor mode
No. of read
No. of write
No. of read No. of write
cycles
cycles
cycles
cycles
16-bit
Even
1
1
1
1
8-bit transfers
(BYTE= “L”)
Odd
1
1
1
1
(DMBIT= “1”)
8-bit
Even
—
—
1
1
(BYTE = “H”)
Odd
—
—
1
1
16-bit
Even
1
1
1
1
16-bit transfers
(BYTE = “L”)
Odd
2
2
2
2
(DMBIT= “0”)
8-bit
Even
—
—
2
2
(BYTE = “H”)
Odd
—
—
2
2
Table 2.9.2 No. of DMAC transfer cycles
2.9.2 DMAC Transfer Cycles
Any combination of even or odd transfer read and write addresses is possible. Table 2.9.2 shows the
number of DMAC transfer cycles.
The number of DMAC transfer cycles can be calculated as follows:
No. of transfer cycles per transfer unit = No. of read cycles ✕ j + No. of write cycles ✕ k
Internal memory
External memory
Internal ROM/RAM
SFR area
Separate bus Separate bus
/OSD RAM
No wait
With wait
12
1
2
Coefficient j, k



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