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M306V2EEFS Folha de dados(PDF) 76 Page - Renesas Technology Corp

Nome de Peças M306V2EEFS
Descrição Electrónicos  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
PDF  271 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M306V2EEFS Folha de dados(HTML) 76 Page - Renesas Technology Corp

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Rev.1.40
Oct 06, 2004 page 76 of 269
M306V2ME-XXXFP, M306V2EEFP
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
cyclescyclescyclescycles
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 Internal ROM/RAM SFR area
Separate busSeparate bus
Multiplex
/OSD RAM
bus
No wait
With wait
No wait
With wait
1
2
212
3
Coefficient j, k



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